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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java @ 1023:5cb84ceee2a0

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Datacage: Templates now can nest <dc:elements> into other elements in the body of <dc:context> flys-artifacts/trunk@2481 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 10 Aug 2011 10:08:01 +0000
parents b81626b10cb7
children 3ca999f507b7
rev   line source
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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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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
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16 public class StackFrames
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17 implements XPathVariableResolver
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18 {
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19 private static Logger log = Logger.getLogger(StackFrames.class);
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20
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21 protected List<Map<String, Object>> frames;
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22
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23 public StackFrames() {
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24 frames = new ArrayList<Map<String, Object>>();
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25 }
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26
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27 public StackFrames(Map<String, Object> initialFrame) {
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28 this();
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29 if (initialFrame != null) {
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30 frames.add(new HashMap<String, Object>(initialFrame));
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31 }
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32 }
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33
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34 public void enter() {
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35 frames.add(new HashMap<String, Object>());
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36 }
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37
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38 public void leave() {
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39 frames.remove(frames.size()-1);
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40 }
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41
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42 public void put(String key, Object value) {
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43 int N = frames.size();
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44 if (N > 0) {
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45 frames.get(N-1).put(key, value);
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46 }
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47 }
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48
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49 public void put(String [] keys, Object [] values) {
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50 Map<String, Object> top = frames.get(frames.size()-1);
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51 for (int i = 0; i < keys.length; ++i) {
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52 top.put(keys[i], values[i]);
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53 }
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54 }
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55
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56 public boolean containsKey(String key) {
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57 for (int i = frames.size()-1; i >= 0; --i) {
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58 if (frames.get(i).containsKey(key)) {
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59 return true;
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60 }
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61 }
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62 return false;
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63 }
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64
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65 public Object get(String key) {
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66 return get(key, null);
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67 }
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68
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69 public Object get(String key, Object def) {
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70
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71 for (int i = frames.size()-1; i >= 0; --i) {
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72 Map<String, Object> frame = frames.get(i);
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73 if (frame.containsKey(key)) {
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74 return frame.get(key);
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75 }
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76 }
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77
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78 return def;
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79 }
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80
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81 @Override
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82 public Object resolveVariable(QName variableName) {
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83 if (log.isDebugEnabled()) {
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84 log.debug("resolve var: " + variableName);
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85 }
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86 return get(variableName.getLocalPart());
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87 }
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88
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89 public String dump() {
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90 StringBuilder sb = new StringBuilder("[");
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91 Set<String> already = new HashSet<String>();
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92
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93 boolean first = true;
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94
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95 for (int i = frames.size()-1; i >= 0; --i) {
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96 Map<String, Object> frame = frames.get(i);
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97 for (Map.Entry<String, Object> entry: frame.entrySet()) {
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98 if (already.add(entry.getKey())) {
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99 if (first) { first = false; }
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100 else { sb.append(", "); }
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101 sb.append('\'').append(entry.getKey())
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102 .append("'='").append(entry.getValue()).append('\'');
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103 }
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104 }
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105 }
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106 return sb.append(']').toString();
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107 }
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108 }
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109 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org