Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java @ 5442:9575264f801d
Only create one FunctionResolver per BuildHelper. Creatin new ones over and over again is excessive.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Tue, 26 Mar 2013 21:55:23 +0100 |
parents | 2970046fcdca |
children | 4d1e2a0c283a 142ed3c62765 |
rev | line source |
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Datacage: Moved templating in a better suited package.
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1 package de.intevation.flys.artifacts.datacage.templating; |
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2 |
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3 import java.util.ArrayList; |
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4 import java.util.Map; |
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5 import java.util.List; |
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6 import java.util.HashMap; |
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7 import java.util.HashSet; |
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8 import java.util.Set; |
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9 |
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10 import javax.xml.xpath.XPathVariableResolver; |
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11 |
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12 import javax.xml.namespace.QName; |
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13 |
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14 import org.apache.log4j.Logger; |
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15 |
4594 | 16 |
17 /** | |
18 * Maintains stack of 'frames' which are maps from string to object. | |
19 * Used for variables in datacage/meta-data system. | |
20 */ | |
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21 public class StackFrames |
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22 implements XPathVariableResolver |
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23 { |
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24 private static Logger log = Logger.getLogger(StackFrames.class); |
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25 |
4594 | 26 /** The frames (used like a stack). */ |
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27 protected List<Map<String, Object>> frames; |
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28 |
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29 public StackFrames() { |
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30 frames = new ArrayList<Map<String, Object>>(); |
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31 } |
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32 |
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33 public StackFrames(Map<String, Object> initialFrame) { |
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34 this(); |
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35 if (initialFrame != null) { |
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36 frames.add(new HashMap<String, Object>(initialFrame)); |
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37 } |
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38 } |
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39 |
4594 | 40 /** Push a new String->Object map. */ |
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41 public void enter() { |
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42 frames.add(new HashMap<String, Object>()); |
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43 } |
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44 |
4594 | 45 /** Pop/Remove last String->Object map. */ |
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46 public void leave() { |
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47 frames.remove(frames.size()-1); |
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48 } |
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49 |
4594 | 50 /** Put Key/Value in last String->Object map. */ |
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51 public void put(String key, Object value) { |
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52 int N = frames.size(); |
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53 if (N > 0) { |
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54 frames.get(N-1).put(key, value); |
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55 } |
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56 } |
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57 |
4594 | 58 /** Put multiple Key/Values in last String->Object map. */ |
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59 public void put(String [] keys, Object [] values) { |
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60 Map<String, Object> top = frames.get(frames.size()-1); |
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61 for (int i = 0; i < keys.length; ++i) { |
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62 top.put(keys[i], values[i]); |
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63 } |
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64 } |
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65 |
4594 | 66 /** Check last frame (string->object map) for key. */ |
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67 public boolean containsKey(String key) { |
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68 key = key.toUpperCase(); |
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69 for (int i = frames.size()-1; i >= 0; --i) { |
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70 if (frames.get(i).containsKey(key)) { |
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71 return true; |
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72 } |
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73 } |
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74 return false; |
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75 } |
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76 |
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77 /** |
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78 * Get element (variable) key. |
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79 * Returns null if not found. |
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80 * @param key name to resolve |
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81 * @return resolution, null if not found. |
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82 */ |
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83 public Object get(String key) { |
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84 return get(key, null); |
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85 } |
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86 |
4594 | 87 /** result[0] is modified with value when true returned. |
88 * @return false if key not found in any frame. */ | |
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89 public boolean getStore(String key, Object [] result) { |
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90 |
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91 key = key.toUpperCase(); |
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92 |
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93 for (int i = frames.size()-1; i >= 0; --i) { |
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94 Map<String, Object> frame = frames.get(i); |
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95 if (frame.containsKey(key)) { |
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96 result[0] = frame.get(key); |
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97 return true; |
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98 } |
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99 } |
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100 |
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101 return false; |
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102 } |
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103 |
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104 public Object get(String key, Object def) { |
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105 |
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106 key = key.toUpperCase(); |
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107 |
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108 for (int i = frames.size()-1; i >= 0; --i) { |
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109 Map<String, Object> frame = frames.get(i); |
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110 if (frame.containsKey(key)) { |
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111 return frame.get(key); |
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112 } |
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113 } |
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114 |
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115 return def; |
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116 } |
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117 |
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Datacage: Moved templating in a better suited package.
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118 @Override |
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119 public Object resolveVariable(QName variableName) { |
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120 if (log.isDebugEnabled()) { |
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121 log.debug("resolve var: " + variableName); |
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122 } |
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123 return get(variableName.getLocalPart()); |
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124 } |
1023
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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context>
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125 |
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126 public String dump() { |
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127 StringBuilder sb = new StringBuilder("["); |
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128 Set<String> already = new HashSet<String>(); |
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129 |
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130 boolean first = true; |
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131 |
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132 for (int i = frames.size()-1; i >= 0; --i) { |
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133 Map<String, Object> frame = frames.get(i); |
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134 for (Map.Entry<String, Object> entry: frame.entrySet()) { |
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135 if (already.add(entry.getKey())) { |
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136 if (first) { first = false; } |
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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context>
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137 else { sb.append(", "); } |
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138 sb.append('\'').append(entry.getKey()) |
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139 .append("'='").append(entry.getValue()).append('\''); |
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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context>
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parents:
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140 } |
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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context>
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parents:
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141 } |
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142 } |
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143 return sb.append(']').toString(); |
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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context>
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144 } |
998
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Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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145 } |
b81626b10cb7
Datacage: Moved templating in a better suited package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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146 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |