--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/transition/OutputTransitionBase.java	Fri Sep 28 12:13:41 2012 +0200
@@ -0,0 +1,155 @@
+/**
+ *
+ */
+package de.intevation.gnv.transition;
+
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import net.sf.ehcache.Element;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import de.intevation.artifactdatabase.Config;
+import de.intevation.artifacts.CallMeta;
+import de.intevation.gnv.artifacts.cache.CacheFactory;
+import de.intevation.gnv.geobackend.base.Result;
+import de.intevation.gnv.transition.exception.TransitionException;
+
+/**
+ * @author Tim Englich <tim.englich@intevation.de>
+ *
+ */
+public abstract class OutputTransitionBase extends TransitionBase implements
+        OutputTransition {
+    
+    
+    /**
+     * The UID of this Class
+     */
+    private static final long serialVersionUID = -1718732895737303823L;
+   
+    /**
+     * the logger, used to log exceptions and additonaly information
+     */
+    private static Logger log = Logger.getLogger(OutputTransitionBase.class);
+    
+    
+    /**
+     * The different Outputmodes which are provided by an OutputTransition
+     */
+    protected Collection<OutputMode> outputModes = null;
+    
+    /**
+     * Constructor
+     */
+    public OutputTransitionBase() {
+        super();
+    }
+
+    /**
+     * @see de.intevation.gnv.transition.OutputTransition#getOutputModes()
+     */
+    public Collection<OutputMode> getOutputModes() {
+        log.debug("OutputTransitionBase.getOutputModes");
+        return this.outputModes;
+    }
+    /**
+     * @see de.intevation.gnv.transition.Transition#validate()
+     */
+    public boolean validate() {
+        log.debug("OutputTransitionBase.validate");
+        return true;
+    }
+
+    /**
+     * @see de.intevation.gnv.transition.TransitionBase#setup(org.w3c.dom.Node)
+     */
+    @Override
+    public void setup(Node configuration) {
+        log.debug("OutputTransitionBase.setup");
+        super.setup(configuration);
+        NodeList outputModeList = Config.getNodeSetXPath(configuration, "outputsModes/outputsMode");
+        if (outputModeList != null){
+            log.debug(outputModeList.getLength()+ " were found.");
+            this.outputModes = new ArrayList<OutputMode>(outputModeList.getLength());
+            for (int i = 0; i < outputModeList.getLength(); i++){
+                Node currentNode = outputModeList.item(i);
+                String name  = Config.getStringXPath(currentNode, "@name");
+                String description  = Config.getStringXPath(currentNode, "@description");
+                String mimeType = Config.getStringXPath(currentNode, "@mime-type");
+                
+                NodeList inputValuesList = Config.getNodeSetXPath(currentNode, "parameters/inputvalue");
+                Collection<InputValue> inputParameters = null;
+                if (inputValuesList != null){
+                    inputParameters = new ArrayList<InputValue>(inputValuesList.getLength());
+                    for (int j = 0 ; j < inputValuesList.getLength(); j++){
+                        Node currentInputValuesNode = inputValuesList.item(j);
+                        String inputValueName = Config.getStringXPath(currentInputValuesNode, "@name");
+                        String inputValueType = Config.getStringXPath(currentInputValuesNode, "@type");
+                        String defaultValue = Config.getStringXPath(currentInputValuesNode, "@value");
+                        boolean isMultiselect = false;
+                        InputValue inputValue = new DefaultInputValue(inputValueName, inputValueType, defaultValue, isMultiselect);
+                        inputParameters.add(inputValue);
+                    }
+                }
+                
+                OutputMode outputMode = new DefaultOutputMode(name, description, mimeType,inputParameters);
+                log.debug(outputMode.toString());
+                this.outputModes.add(outputMode);
+                
+            }
+        }
+    }
+    
+    /**
+     * @see de.intevation.gnv.transition.TransitionBase#advance()
+     */
+    @Override
+    public void advance(String uuid, CallMeta callMeta) throws TransitionException {
+        log.debug("OutputTransitionBase.advance");
+        if (this.getChartResult(uuid) == null){
+            super.advance(uuid, callMeta);
+        }
+    }
+
+    /**
+     * @see de.intevation.gnv.transition.OutputTransition#out(java.lang.String, java.util.Collection, java.io.OutputStream)
+     */
+    public void out(String outputMode, Collection<InputData> inputData,
+            OutputStream outputStream) throws TransitionException {
+    }
+
+    /**
+     * @return
+     */
+    protected Collection<Result> getChartResult(String uuid) {
+        log.debug("OutputTransitionBase.getChartResult");
+        if (CacheFactory.getInstance().isInitialized()){
+            String key = uuid+super.getID();
+            log.debug("Hash for Queryelements: "+key);
+            Element value = CacheFactory.getInstance().getCache().get(key);
+            if (value != null){
+                return (Collection<Result>)(value.getObjectValue());
+            }
+        }
+        return null;
+    }
+    
+    /**
+     * @see de.intevation.gnv.transition.TransitionBase#purifyResult(java.util.Collection, java.lang.String)
+     */
+    @Override
+    protected void purifyResult(Collection<Result> result, String uuid) {
+        log.debug("OutputTransitionBase.purifyResult");
+        if (CacheFactory.getInstance().isInitialized()){
+            String key = uuid+super.getID();
+            log.debug("Hash for Queryelements: "+key);
+            CacheFactory.getInstance().getCache().put(new Element(key, result));
+        }
+    }
+
+}