Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-after / ui / org / eclipse / jdt / internal / ui / javadocexport / JavadocReader.java

diff --git a/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocReader.java b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocReader.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2009 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.javadocexport;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import org.eclipse.core.runtime.Assert;
+
+
+/**
+ * Reads data from an InputStream and returns a JarPackage
+ */
+public class JavadocReader extends Object {
+
+       private InputStream fInputStream;
+
+       /**
+        * Reads a Javadoc Ant Script from the underlying stream. It is the client's responsibility to
+        * close the stream.
+        * 
+        * @param inputStream the input stream to read from
+        */
+       public JavadocReader(InputStream inputStream) {
+               Assert.isNotNull(inputStream);
+               fInputStream= new BufferedInputStream(inputStream);
+       }
+
+       /**
+        * Closes this stream. It is the clients responsibility to close the stream.
+        * 
+        * @exception IOException if the stream cannot be closed
+        */
+       public void close() throws IOException {
+               if (fInputStream != null)
+                       fInputStream.close();
+       }
+
+       public Element readXML() throws IOException, SAXException {
+
+               DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance();
+               factory.setValidating(false);
+               DocumentBuilder parser= null;
+               try {
+                       parser= factory.newDocumentBuilder();
+               } catch (ParserConfigurationException ex) {
+                       throw new IOException(ex.getMessage());
+               } finally {
+                       // Note: Above code is OK since clients are responsible to close the stream
+               }
+
+               //find the project associated with the ant script
+               parser.setErrorHandler(new DefaultHandler());
+               Element xmlJavadocDesc= parser.parse(new InputSource(fInputStream)).getDocumentElement();
+
+               NodeList targets= xmlJavadocDesc.getChildNodes();
+
+               for (int i= 0; i < targets.getLength(); i++) {
+                       Node target= targets.item(i);
+
+                       //look through the XML file for the javadoc task
+                       if (target.getNodeName().equals("target")) { //$NON-NLS-1$
+                               NodeList children= target.getChildNodes();
+                               for (int j= 0; j < children.getLength(); j++) {
+                                       Node child= children.item(j);
+                                       if (child.getNodeName().equals("javadoc") && (child.getNodeType() == Node.ELEMENT_NODE)) { //$NON-NLS-1$
+                                               return (Element) child;
+                                       }
+                               }
+                       }
+
+               }
+               return null;
+       }
+
+}