Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/StackFrames.java @ 970:e456aca4eb7b
meta data service: Adjusted to use the DataCage recommendations.
flys-artifacts/trunk@2395 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 22 Jul 2011 10:41:30 +0000 |
parents | e91996b46e3c |
children | d830c398c8f4 |
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1 package de.intevation.flys.artifacts.services.meta; |
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2 |
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3 import java.util.Map; |
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4 import java.util.List; |
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5 import java.util.HashMap; |
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6 import java.util.ArrayList; |
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7 |
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8 import javax.xml.xpath.XPathVariableResolver; |
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9 |
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10 import javax.xml.namespace.QName; |
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11 |
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12 public class StackFrames |
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13 implements XPathVariableResolver |
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14 { |
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15 protected List<Map<String, Object>> frames; |
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16 |
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17 public StackFrames() { |
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18 frames = new ArrayList<Map<String, Object>>(); |
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19 } |
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20 |
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21 public StackFrames(Map<String, Object> initialFrame) { |
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22 this(); |
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23 if (initialFrame != null) { |
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24 frames.add(new HashMap<String, Object>(initialFrame)); |
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25 } |
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26 } |
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27 |
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28 public void enter() { |
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29 frames.add(new HashMap<String, Object>()); |
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30 } |
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31 |
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32 public void leave() { |
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33 frames.remove(frames.size()-1); |
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34 } |
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35 |
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36 public void put(String key, Object value) { |
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37 int N = frames.size(); |
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38 if (N > 0) { |
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39 frames.get(N-1).put(key, value); |
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40 } |
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41 } |
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42 |
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43 public void put(String [] keys, Object [] values) { |
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44 Map<String, Object> top = frames.get(frames.size()-1); |
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45 for (int i = 0; i < keys.length; ++i) { |
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46 top.put(keys[i], values[i]); |
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47 } |
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48 } |
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49 |
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50 public boolean containsKey(String key) { |
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51 for (int i = frames.size()-1; i >= 0; --i) { |
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52 if (frames.get(i).containsKey(key)) { |
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53 return true; |
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54 } |
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55 } |
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56 return false; |
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57 } |
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58 |
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59 public Object get(String key) { |
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60 return get(key, null); |
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61 } |
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62 |
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63 public Object get(String key, Object def) { |
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64 |
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65 for (int i = frames.size()-1; i >= 0; --i) { |
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66 Map<String, Object> frame = frames.get(i); |
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67 if (frame.containsKey(key)) { |
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68 return frame.get(key); |
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69 } |
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70 } |
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71 |
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72 return def; |
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73 } |
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74 |
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75 @Override |
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76 public Object resolveVariable(QName variableName) { |
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77 return get(variableName.getLocalPart()); |
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78 } |
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79 } |
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80 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |