Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/StackFrames.java @ 625:c0c60a611fca
Introduce model to store q values of WST columns efficiently.
flys-artifacts/trunk@1983 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 23 May 2011 22:33:37 +0000 |
parents | 7c018f466d6d |
children | e91996b46e3c |
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Added meta data service.
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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 public class StackFrames |
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9 { |
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10 protected List<Map<String, Object>> frames; |
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11 |
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12 public StackFrames() { |
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13 frames = new ArrayList<Map<String, Object>>(); |
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14 } |
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15 |
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16 public StackFrames(Map<String, Object> initialFrame) { |
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17 this(); |
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18 if (initialFrame != null) { |
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19 frames.add(new HashMap<String, Object>(initialFrame)); |
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20 } |
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21 } |
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22 |
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23 public void enter() { |
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24 frames.add(new HashMap<String, Object>()); |
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25 } |
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26 |
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27 public void leave() { |
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28 frames.remove(frames.size()-1); |
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29 } |
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30 |
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31 public void put(String key, Object value) { |
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32 int N = frames.size(); |
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33 if (N > 0) { |
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34 frames.get(N-1).put(key, value); |
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35 } |
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36 } |
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37 |
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38 public void put(String [] keys, Object [] values) { |
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39 Map<String, Object> top = frames.get(frames.size()-1); |
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40 for (int i = 0; i < keys.length; ++i) { |
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41 top.put(keys[i], values[i]); |
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42 } |
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43 } |
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44 |
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45 public boolean containsKey(String key) { |
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46 for (int i = frames.size()-1; i >= 0; --i) { |
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47 if (frames.get(i).containsKey(key)) { |
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48 return true; |
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49 } |
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50 } |
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51 return false; |
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52 } |
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53 |
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54 public Object get(String key) { |
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55 return get(key, null); |
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56 } |
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57 |
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58 public Object get(String key, Object def) { |
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59 |
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60 for (int i = frames.size()-1; i >= 0; --i) { |
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61 Map<String, Object> frame = frames.get(i); |
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62 if (frame.containsKey(key)) { |
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63 return frame.get(key); |
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64 } |
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65 } |
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66 |
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67 return def; |
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68 } |
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69 } |
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70 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |