Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/OutputStateBase.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents cc4ec127d666
children dec4257ad570
rev   line source
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f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.state;
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10
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11 import java.io.OutputStream;
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12 import java.util.ArrayList;
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13 import java.util.Collection;
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14 import java.util.HashMap;
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15 import java.util.Iterator;
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16 import java.util.List;
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17 import java.util.Locale;
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18
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19 import javax.xml.xpath.XPathConstants;
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20
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21 import net.sf.ehcache.Cache;
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22
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23 import org.apache.log4j.Logger;
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24 import org.w3c.dom.Document;
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25 import org.w3c.dom.Element;
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26 import org.w3c.dom.Node;
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27 import org.w3c.dom.NodeList;
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28
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29 import de.intevation.artifactdatabase.Config;
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30 import de.intevation.artifactdatabase.XMLUtils;
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31 import de.intevation.artifacts.CallContext;
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32 import de.intevation.artifacts.CallMeta;
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33 import de.intevation.gnv.artifacts.cache.CacheFactory;
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34 import de.intevation.gnv.artifacts.ressource.RessourceFactory;
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35 import de.intevation.gnv.geobackend.base.Result;
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36 import de.intevation.gnv.geobackend.base.query.QueryExecutor;
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37 import de.intevation.gnv.geobackend.base.query.QueryExecutorFactory;
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38 import de.intevation.gnv.geobackend.base.query.exception.QueryException;
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39 import de.intevation.gnv.state.describedata.MinMaxDescribeData;
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40 import de.intevation.gnv.state.exception.StateException;
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41 import de.intevation.gnv.utils.InputValidator;
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42
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43 /**
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44 * This is the default implementation of <code>OutputState</code>. Artifacts
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45 * having reached this state or a subclass of this state are able to produce
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46 * some output (e.g. chart, histograms, statistic, etc).
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47 *
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48 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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49 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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50 *
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51 */
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52 public abstract class OutputStateBase
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53 extends StateBase
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54 implements OutputState
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55 {
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56 public static final String XPATH_OUTPUT_MODE =
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57 "/art:action/art:out/@name";
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58
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59 public static final String XPATH_EXPORT_MODE =
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60 "/art:action/art:out/art:export/@name";
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61
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62 public static final String XPATH_MIME_TYPE =
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63 "/art:action/art:out/art:mime-type/@value";
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64
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65 public static final String XPATH_EXPORTS =
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66 "exportModes/export";
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67
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68 /**
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69 * The UID of this Class
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70 */
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71 private static final long serialVersionUID = -1718732895737303823L;
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72
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73 /**
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74 * the logger, used to log exceptions and additonaly information
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75 */
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76 private static Logger log = Logger.getLogger(OutputStateBase.class);
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77
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78 /**
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79 * The different Outputmodes which are provided by an OutputState
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80 */
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81 protected Collection<OutputMode> outputModes = null;
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82
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83 protected String queryODVID = null;
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84
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85 /**
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86 * Constructor
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87 */
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88 public OutputStateBase() {
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89 super();
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90 }
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91
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92 public Collection<OutputMode> getOutputModes() {
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93 log.debug("OutputStateBase.getOutputModes");
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94 return this.outputModes;
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95 }
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96
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97
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98 @Override
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99 public void setup(Node configuration) {
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100 log.debug("OutputStateBase.setup");
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101 super.setup(configuration);
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102
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103 this.queryODVID = Config.getStringXPath(configuration,"queryID-odv");
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104
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105 NodeList outputModeList = Config.getNodeSetXPath(configuration,
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106 "outputsModes/outputsMode");
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107 if (outputModeList != null) {
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108 log.debug(outputModeList.getLength() + " were found.");
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109 this.outputModes = new ArrayList<OutputMode>(outputModeList
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110 .getLength());
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111 for (int i = 0; i < outputModeList.getLength(); i++) {
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112 Element currentNode = (Element)outputModeList.item(i);
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113 String name = currentNode.getAttribute("name");
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114 String description =currentNode.getAttribute("description");
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115 String mimeType = currentNode.getAttribute("mime-type");
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116 NodeList inputValuesList = Config.getNodeSetXPath(currentNode,
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117 "parameters/inputvalue");
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118 Collection<InputValue> inputParameters = null;
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119 if (inputValuesList != null) {
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120 inputParameters = new ArrayList<InputValue>(inputValuesList
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121 .getLength());
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122 for (int j = 0; j < inputValuesList.getLength(); j++) {
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123 Element currentInputValuesNode = (Element)inputValuesList.item(j);
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124 String inputValueName = currentInputValuesNode.getAttribute("name");
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125 String inputValueType = currentInputValuesNode.getAttribute("type");
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126 String defaultValue =currentInputValuesNode.getAttribute("value");
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127 boolean isMultiselect = false;
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128 InputValue inputValue = new DefaultInputValue(
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129 inputValueName, inputValueType, defaultValue,
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130 isMultiselect);
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131 inputParameters.add(inputValue);
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132 }
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133 }
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134
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135 // parse export modes
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136 List<ExportMode> exportList = null;
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137 NodeList exports = (NodeList) XMLUtils.xpath(
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138 currentNode, XPATH_EXPORTS, XPathConstants.NODESET);
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139
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140 if (exports != null) {
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141 int exportSize = exports.getLength();
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142
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143 exportList = new ArrayList<ExportMode>(exportSize);
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144 for (int k = 0; k < exportSize; k++) {
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145 Element exp = (Element) exports.item(k);
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146 String expName = exp.getAttribute("name");
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147 String expDesc = exp.getAttribute("description");
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148 String expMime = exp.getAttribute("mime-type");
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149
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150 exportList.add(
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151 new DefaultExportMode(expName, expDesc, expMime));
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152 }
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153 }
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154
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155 OutputMode outputMode = new DefaultOutputMode(name,
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156 description, mimeType, inputParameters, exportList);
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157 log.debug(outputMode.toString());
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158 this.outputModes.add(outputMode);
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159
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160 }
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161 }
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162 }
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163
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164
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165 @Override
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166 public void advance(String uuid, CallContext context)
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167 throws StateException
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168 {
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169 }
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170
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171
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172 @Override
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173 public void initialize(String uuid, CallContext context)
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174 throws StateException
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175 {
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176 }
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177
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178 /**
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179 * This method needs to be defined by concrete subclasses. Nothing is done
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180 * here.
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181 */
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182 public void out(
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183 Document format,
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184 Collection<InputData> inputData,
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185 OutputStream outputStream,
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186 String uuid,
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187 CallMeta callMeta
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188 )
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189 throws StateException
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190 {
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191 }
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192
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193 /**
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194 * This method needs to be defined by concrete subclasses. Nothing is done
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195 * here.
335
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196 */
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197 public void out(String outputMode, Collection<InputData> inputData,
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198 OutputStream outputStream) throws StateException {
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199 }
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200
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201 /**
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202 * Returns the data used to create charts. If a cache is configured, try to
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203 * fetch the data from cache. The database is queried if the data is not in
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204 * cache yet, or if no cache is configured. If the cache is configured, but
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205 * the data is not in cache yet, put it into cache for a faster access
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206 * in a later time.
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207 *
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208 * @param uuid The uuid of an artifact.
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209 * @param callContext The CallContext.
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210 * @return the chart data.
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211 */
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212 protected Object getChartResult(String uuid, CallContext callContext) {
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213 log.debug("OutputStateBase.getChartResult");
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214 CacheFactory factory = CacheFactory.getInstance();
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215
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216 if (factory.isInitialized()) {
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217 // we use a cache
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218 log.info("Using cache.");
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219 Cache cache = factory.getCache();
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220 String key = "chart_" + getHash();
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221
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222 net.sf.ehcache.Element value = cache.get(key);
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223 if (value != null) {
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224 log.debug("Found element in cache.");
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225 return value.getObjectValue();
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226 }
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227 else {
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228 log.debug("Element not in cache, we need to ask the database");
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229 Object result = getData(queryID);
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230 cache.put(new net.sf.ehcache.Element(key, result));
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231
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232 return result;
335
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233 }
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234 }
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235 else {
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236 // we don't use a cache, so we have to query the database every
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237 // single time
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238 log.info("Not using a cache.");
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239 return getData(queryID);
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240 }
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241 }
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242
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243 /**
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244 * This method should no longer be used, because it is not good to put a
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245 * chart into cache. Parameter changes done by the user wouldn't be detected
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246 * proper.
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247 * @deprecated
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248 */
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249 protected Object getChartFromCache(String uuid, CallContext callContext) {
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250 log.debug("Fetch chart [" + uuid + "] from cache");
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251 CacheFactory cacheFactory = CacheFactory.getInstance();
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252 if (cacheFactory.isInitialized()) {
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253 String key = "chart_" + getHash();
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254 net.sf.ehcache.Element object = cacheFactory.getCache().get(key);
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255
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256 if (object != null) {
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257 return object.getObjectValue();
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258 }
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259 }
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260 return null;
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261 }
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262
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263 /**
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264 * Retrieves the data used to create an ODV export.
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265 *
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266 * @param uuid
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267 * @return odv data.
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268 */
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269 protected Collection<Result> getODVResult(String uuid) {
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270 log.debug("OutputStateBase.getODVResult");
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271 // TODO add Caching? I think it's not nessessary
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272 Collection<Result> returnValue = null;
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273 if (this.queryODVID != null){
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274 returnValue = this.getData(this.queryODVID);
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275 }else{
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276 log.warn("No Query for ODV Data is defined.");
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277 }
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278 return returnValue;
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279 }
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280
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281 /**
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282 * Retrieve data from database with help of queryID.
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283 *
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284 * @param queryID A query id defined in sql statements properties file.
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285 * @return some data.
335
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286 */
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287 protected Collection<Result> getData(String queryID) {
335
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288 log.debug("OutputStateBase.getData");
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289 Collection<Result> returnValue = null;
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290 try {
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291 String[] filterValues = this.generateFilterValuesFromInputData();
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292 try {
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293 QueryExecutor queryExecutor = QueryExecutorFactory
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294 .getInstance()
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295 .getQueryExecutor();
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296 returnValue = queryExecutor.executeQuery(queryID,filterValues);
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297 } catch (RuntimeException e) {
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298 log.error(e, e);
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299 }
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300 } catch (QueryException e) {
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301 log.error(e, e);
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302 }
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303 return returnValue;
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304 }
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305
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306 /**
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307 * This method removes the data used for creating charts from cache.
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308 *
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309 */
335
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310 protected void removeChartResult(String uuid) {
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311 log.debug("OutputStateBase.getChartResult");
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312 if (CacheFactory.getInstance().isInitialized()) {
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313 String key = "chart_" + getHash();
335
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314 log.debug("Hash for Queryelements: " + key);
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315 net.sf.ehcache.Element value = CacheFactory.getInstance().getCache().get(key);
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316 if (value != null) {
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317 CacheFactory.getInstance().getCache().remove(key);
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318 }
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319 }
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320 }
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321
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322 /**
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323 * This method should no longer be used. It removes a chart from cache.
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324 *
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325 * @deprecated
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326 */
335
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327 protected void removeChart(String uuid) {
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328 log.debug("OutputStateBase.removeChart from cache");
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329
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330 CacheFactory cacheFactory = CacheFactory.getInstance();
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331 if (cacheFactory.isInitialized()) {
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332 String key = "chart_" + getHash();
335
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333 net.sf.ehcache.Element object = cacheFactory.getCache().get(key);
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334 if (object != null)
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335 cacheFactory.getCache().remove(key);
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336 }
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337 }
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338
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339 /**
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340 * This is an internal method used while database query.
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341 */
335
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342 protected void purifyChart(Object chart, String uuid) {
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343 log.debug("Prufify chart [" + uuid + "]");
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344 CacheFactory cacheFactory = CacheFactory.getInstance();
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345 if (cacheFactory.isInitialized()) {
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346 String key = "chart_" + getHash();
335
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347 cacheFactory.getCache().put(new net.sf.ehcache.Element(key, chart));
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348 }
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349 }
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350
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351
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352 /**
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353 * Use this method to feed a state with new data.
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354 */
610
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355 @Override
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356 public Document feed(
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357 CallContext context,
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358 Collection<InputData> inputData,
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359 String uuid)
610
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360 throws StateException
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361 {
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362 putInputData(inputData, uuid);
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363
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364 return feedSuccess();
610
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365 }
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366
335
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367 /**
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368 * This method is used to put new data into a next state. The difference
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369 * between this method and feed is, that this method should be used to
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370 * transfer some old input data required by this state. New data need to be
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371 * inserted via feed!
335
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372 */
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373 @Override
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374 public void putInputData(Collection<InputData> inputData,
335
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375 String uuid)
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376 throws StateException {
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377 log.debug("OutputStateBase.putInputData");
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378 this.removeChartResult(uuid);
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379 this.removeChart(uuid);
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380
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381 if (inputData != null) {
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382 Iterator<InputData> it = inputData.iterator();
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383 InputValidator iv = new InputValidator();
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384 while (it.hasNext()) {
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385 InputData tmpItem = it.next();
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386 Object tmpObj = tmpItem.getObject();
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387 InputValue inputValue = this.inputValues.get(tmpItem.getName());
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388 if (inputValue != null) {
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389 if (this.inputData == null) {
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390 this.inputData = new HashMap<String, InputData>(
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391 inputData.size());
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392 }
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393
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394 boolean valid = InputValidator.isInputValid(tmpItem.getValue(),
610
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diff changeset
395 inputValue.getType());
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396 if (valid) {
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397 if (tmpItem.getName().equals(MINVALUEFIELDNAME)){
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398 String minValue = tmpItem.getValue();
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399 String maxValue = getInputValue4ID(inputData, MAXVALUEFIELDNAME);
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diff changeset
400 valid = InputValidator.isInputValid(maxValue,inputValue.getType());
610
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401 if (!valid){
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diff changeset
402 String errMsg = "Wrong input for " + tmpItem.getValue()
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403 + " is not an " + inputValue.getType()
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404 + " Value.";
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405 log.warn(errMsg);
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406 throw new StateException(errMsg);
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diff changeset
407 }
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diff changeset
408
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diff changeset
409 valid = InputValidator.isInputValid(minValue,
610
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diff changeset
410 maxValue,
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diff changeset
411 inputValue.getType());
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412 if (!valid){
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413 String errMsg = "MaxValue-Input is less than MinValue-Input ";
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414 log.warn(errMsg);
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415 throw new StateException(errMsg);
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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416 }
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417 }else if (tmpItem.getName().equals(MAXVALUEFIELDNAME)){
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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418 String minValue = getInputValue4ID(inputData, MINVALUEFIELDNAME);
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419 String maxValue = tmpItem.getValue();
796
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420 valid = InputValidator.isInputValid(minValue,inputValue.getType());
610
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421 if (!valid){
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422 String errMsg = "Wrong input for " + tmpItem.getValue()
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423 + " is not an " + inputValue.getType()
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424 + " Value.";
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425 log.warn(errMsg);
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426 throw new StateException(errMsg);
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parents: 493
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427 }
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428
796
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429 valid = InputValidator.isInputValid(minValue,
610
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430 maxValue,
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431 inputValue.getType());
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432 if (!valid){
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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433 String errMsg = "MaxValue-Input is less than MinValue-Input ";
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parents: 493
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434 log.warn(errMsg);
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parents: 493
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435 throw new StateException(errMsg);
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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parents: 493
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436 }
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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437 }
6484464d2059 Changed the mechanism for searching for specific parameter collections.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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438 this.inputData.put(tmpItem.getName(), tmpItem);
6484464d2059 Changed the mechanism for searching for specific parameter collections.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 493
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439 } else {
6484464d2059 Changed the mechanism for searching for specific parameter collections.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 493
diff changeset
440 String errMsg = "Wrong input for " + tmpItem.getValue()
6484464d2059 Changed the mechanism for searching for specific parameter collections.
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parents: 493
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441 + " is not an " + inputValue.getType()
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parents: 493
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442 + " Value.";
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443 log.warn(errMsg);
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444 throw new StateException(errMsg);
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445 }
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parents: 493
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446
778
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447 }
610
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448 else if (tmpObj != null && tmpObj instanceof MinMaxDescribeData) {
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449 MinMaxDescribeData data = (MinMaxDescribeData) tmpObj;
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450 if (this.inputData == null) {
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451 this.inputData = new HashMap<String, InputData>(inputData.size());
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452 }
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453 this.inputData.put(tmpItem.getName(), tmpItem);
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454 this.inputData.put("minvalue", new DefaultInputData("minvalue", (String) data.getMinValue()));
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455 this.inputData.put("maxvalue", new DefaultInputData("maxvalue", (String) data.getMaxValue()));
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456 }
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457 else {
778
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parents: 725
diff changeset
458
610
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diff changeset
459 String errMsg = "No Inputvalue given for Inputdata "
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460 + tmpItem.getName();
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461 log.warn(errMsg + "Value will be ignored");
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parents: 493
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462
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463 }
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parents: 493
diff changeset
464 }
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465 } else {
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466 log.warn("No Inputdata given");
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parents: 493
diff changeset
467 }
818
8dc820099306 BUGFIX: Chartresults where stored in Cache using null-Value as Key.
Tim Englich <tim.englich@intevation.de>
parents: 815
diff changeset
468 setHash(uuid);
335
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parents:
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469 }
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parents:
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470
815
22c18083225e Removed compiler warnings while JavaDoc generation.
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parents: 803
diff changeset
471
796
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472 public void out(
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parents: 780
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473 String outputMode,
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parents: 780
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474 Collection<InputData> inputData,
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parents: 780
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475 OutputStream outputStream,
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parents: 780
diff changeset
476 String uuid,
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
477 CallMeta callMeta)
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parents: 780
diff changeset
478 throws StateException { }
335
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parents:
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479
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parents:
diff changeset
480
796
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parents: 780
diff changeset
481 /**
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
482 * Retrieves a message from resource bundle specified by locale.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
483 *
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
484 * @param locale Locale to use.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
485 * @param key The key of the message.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
486 * @param value The default value.
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 780
diff changeset
487 * @return The value.
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parents: 780
diff changeset
488 */
335
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parents:
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489 protected String getMessage(Locale locale, String key, String value) {
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parents:
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490 return RessourceFactory.getInstance().getRessource(
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491 locale,
e964a3d8f7bc Some Refactoring work done.
Tim Englich <tim.englich@intevation.de>
parents:
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492 key,
e964a3d8f7bc Some Refactoring work done.
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parents:
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493 value
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parents:
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494 );
e964a3d8f7bc Some Refactoring work done.
Tim Englich <tim.englich@intevation.de>
parents:
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495 }
e964a3d8f7bc Some Refactoring work done.
Tim Englich <tim.englich@intevation.de>
parents:
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496 }
796
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parents: 780
diff changeset
497 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org