Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java @ 998:b81626b10cb7
Datacage: Moved templating in a better suited package.
flys-artifacts/trunk@2434 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 01 Aug 2011 08:31:09 +0000 |
parents | |
children | 5cb84ceee2a0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/StackFrames.java Mon Aug 01 08:31:09 2011 +0000 @@ -0,0 +1,87 @@ +package de.intevation.flys.artifacts.datacage.templating; + +import java.util.Map; +import java.util.List; +import java.util.HashMap; +import java.util.ArrayList; + +import javax.xml.xpath.XPathVariableResolver; + +import javax.xml.namespace.QName; + +import org.apache.log4j.Logger; + +public class StackFrames +implements XPathVariableResolver +{ + private static Logger log = Logger.getLogger(StackFrames.class); + + protected List<Map<String, Object>> frames; + + public StackFrames() { + frames = new ArrayList<Map<String, Object>>(); + } + + public StackFrames(Map<String, Object> initialFrame) { + this(); + if (initialFrame != null) { + frames.add(new HashMap<String, Object>(initialFrame)); + } + } + + public void enter() { + frames.add(new HashMap<String, Object>()); + } + + public void leave() { + frames.remove(frames.size()-1); + } + + public void put(String key, Object value) { + int N = frames.size(); + if (N > 0) { + frames.get(N-1).put(key, value); + } + } + + public void put(String [] keys, Object [] values) { + Map<String, Object> top = frames.get(frames.size()-1); + for (int i = 0; i < keys.length; ++i) { + top.put(keys[i], values[i]); + } + } + + public boolean containsKey(String key) { + for (int i = frames.size()-1; i >= 0; --i) { + if (frames.get(i).containsKey(key)) { + return true; + } + } + return false; + } + + public Object get(String key) { + return get(key, null); + } + + public Object get(String key, Object def) { + + for (int i = frames.size()-1; i >= 0; --i) { + Map<String, Object> frame = frames.get(i); + if (frame.containsKey(key)) { + return frame.get(key); + } + } + + return def; + } + + @Override + public Object resolveVariable(QName variableName) { + if (log.isDebugEnabled()) { + log.debug("resolve var: " + variableName); + } + return get(variableName.getLocalPart()); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :