| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.corext.util; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.StringTokenizer; |
| |
| import javax.xml.parsers.DocumentBuilder; |
| import javax.xml.parsers.DocumentBuilderFactory; |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.transform.OutputKeys; |
| import javax.xml.transform.Transformer; |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.search.IJavaSearchScope; |
| import org.eclipse.jdt.core.search.SearchEngine; |
| |
| import org.eclipse.jdt.internal.corext.CorextMessages; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.JavaUIException; |
| import org.eclipse.jdt.internal.ui.JavaUIStatus; |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| |
| public class TypeInfoHistory { |
| |
| private static final String NODE_ROOT= "typeInfoHistroy"; //$NON-NLS-1$ |
| private static final String NODE_TYPE_INFO= "typeInfo"; //$NON-NLS-1$ |
| private static final String NODE_NAME= "name"; //$NON-NLS-1$ |
| private static final String NODE_PACKAGE= "package"; //$NON-NLS-1$ |
| private static final String NODE_ENCLOSING_NAMES= "enclosingTypes"; //$NON-NLS-1$ |
| private static final String NODE_PATH= "path"; //$NON-NLS-1$ |
| private static final String NODE_MODIFIERS= "modifiers"; //$NON-NLS-1$ |
| |
| private static final char[][] EMPTY_ENCLOSING_NAMES= new char[0][0]; |
| |
| private Map fHistroy= new LinkedHashMap(80, 0.75f, true) { |
| private static final long serialVersionUID= 1L; |
| protected boolean removeEldestEntry(Map.Entry eldest) { |
| return size() > 60; |
| } |
| }; |
| |
| private static final String FILENAME= "TypeInfoHistory.xml"; //$NON-NLS-1$ |
| private static TypeInfoHistory fgInstance; |
| |
| public static TypeInfoHistory getInstance() { |
| if (fgInstance == null) |
| fgInstance= new TypeInfoHistory(); |
| return fgInstance; |
| } |
| |
| public TypeInfoHistory() { |
| load(); |
| } |
| |
| public boolean isEmpty() { |
| return fHistroy.isEmpty(); |
| } |
| |
| public void checkConsistency(IProgressMonitor monitor) { |
| IJavaSearchScope scope= SearchEngine.createWorkspaceScope(); |
| List keys= new ArrayList(fHistroy.keySet()); |
| monitor.beginTask(CorextMessages.TypeInfoHistory_consistency_check, keys.size()); |
| for (Iterator iter= keys.iterator(); iter.hasNext();) { |
| TypeInfo type= (TypeInfo)iter.next(); |
| try { |
| IJavaElement element= type.getJavaElement(scope); |
| if (element == null || !element.exists()) |
| fHistroy.remove(type); |
| } catch (JavaModelException e) { |
| fHistroy.remove(type); |
| } |
| monitor.worked(1); |
| } |
| monitor.done(); |
| } |
| |
| public void accessed(TypeInfo info) { |
| fHistroy.put(info, info); |
| } |
| |
| public TypeInfo remove(TypeInfo info) { |
| return (TypeInfo)fHistroy.remove(info); |
| } |
| |
| public TypeInfo[] getTypeInfos() { |
| Collection values= fHistroy.values(); |
| int size= values.size(); |
| TypeInfo[] result= new TypeInfo[size]; |
| int i= size - 1; |
| for (Iterator iter= values.iterator(); iter.hasNext();) { |
| result[i]= (TypeInfo)iter.next(); |
| i--; |
| } |
| return result; |
| } |
| |
| public TypeInfo[] getFilteredTypeInfos(TypeInfoFilter filter) { |
| Collection values= fHistroy.values(); |
| List result= new ArrayList(); |
| for (Iterator iter= values.iterator(); iter.hasNext();) { |
| TypeInfo type= (TypeInfo)iter.next(); |
| if ((filter == null || filter.matchesHistoryElement(type)) && !TypeFilter.isFiltered(type.getFullyQualifiedName())) |
| result.add(type); |
| } |
| Collections.reverse(result); |
| return (TypeInfo[])result.toArray(new TypeInfo[result.size()]); |
| |
| } |
| |
| private void load() { |
| IPath stateLocation= JavaPlugin.getDefault().getStateLocation().append(FILENAME); |
| File file= new File(stateLocation.toOSString()); |
| if (file.exists()) { |
| InputStreamReader reader= null; |
| try { |
| reader = new InputStreamReader(new FileInputStream(file), "utf-8");//$NON-NLS-1$ |
| load(new InputSource(reader)); |
| } catch (IOException e) { |
| JavaPlugin.log(e); |
| } catch (CoreException e) { |
| JavaPlugin.log(e); |
| } finally { |
| try { |
| if (reader != null) |
| reader.close(); |
| } catch (IOException e) { |
| JavaPlugin.log(e); |
| } |
| } |
| } |
| } |
| |
| private void load(InputSource inputSource) throws CoreException { |
| TypeInfoFactory factory= new TypeInfoFactory(); |
| Element root; |
| try { |
| DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder(); |
| root = parser.parse(inputSource).getDocumentElement(); |
| } catch (SAXException e) { |
| throw createException(e, CorextMessages.TypeInfoHistory_error_read); |
| } catch (ParserConfigurationException e) { |
| throw createException(e, CorextMessages.TypeInfoHistory_error_read); |
| } catch (IOException e) { |
| throw createException(e, CorextMessages.TypeInfoHistory_error_read); |
| } |
| |
| if (root == null) return; |
| if (!root.getNodeName().equalsIgnoreCase(NODE_ROOT)) { |
| return; |
| } |
| NodeList list= root.getChildNodes(); |
| int length= list.getLength(); |
| for (int i= 0; i < length; ++i) { |
| Node node= list.item(i); |
| if (node.getNodeType() == Node.ELEMENT_NODE) { |
| Element type= (Element) node; |
| if (type.getNodeName().equalsIgnoreCase(NODE_TYPE_INFO)) { |
| String name= type.getAttribute(NODE_NAME); |
| String pack= type.getAttribute(NODE_PACKAGE); |
| char[][] enclosingNames= getEnclosingNames(type); |
| String path= type.getAttribute(NODE_PATH); |
| int modifiers= 0; |
| try { |
| modifiers= Integer.parseInt(type.getAttribute(NODE_MODIFIERS)); |
| } catch (NumberFormatException e) { |
| // take zero |
| } |
| TypeInfo info= factory.create( |
| pack.toCharArray(), name.toCharArray(), enclosingNames, modifiers, path); |
| fHistroy.put(info, info); |
| } |
| } |
| } |
| } |
| |
| public void save() { |
| IPath stateLocation= JavaPlugin.getDefault().getStateLocation().append(FILENAME); |
| File file= new File(stateLocation.toOSString()); |
| OutputStream out= null; |
| try { |
| out= new FileOutputStream(file); |
| save(out); |
| } catch (IOException e) { |
| JavaPlugin.log(e); |
| } catch (CoreException e) { |
| JavaPlugin.log(e); |
| } finally { |
| try { |
| if (out != null) { |
| out.close(); |
| } |
| } catch (IOException e) { |
| JavaPlugin.log(e); |
| } |
| } |
| } |
| |
| private void save(OutputStream stream) throws CoreException { |
| try { |
| DocumentBuilderFactory factory= DocumentBuilderFactory.newInstance(); |
| DocumentBuilder builder= factory.newDocumentBuilder(); |
| Document document= builder.newDocument(); |
| |
| Element rootElement = document.createElement(NODE_ROOT); |
| document.appendChild(rootElement); |
| |
| Iterator values= fHistroy.values().iterator(); |
| while (values.hasNext()) { |
| TypeInfo type= (TypeInfo)values.next(); |
| Element typeElement= document.createElement(NODE_TYPE_INFO); |
| typeElement.setAttribute(NODE_NAME, type.getTypeName()); |
| typeElement.setAttribute(NODE_PACKAGE, type.getPackageName()); |
| typeElement.setAttribute(NODE_ENCLOSING_NAMES, type.getEnclosingName()); |
| typeElement.setAttribute(NODE_PATH, type.getPath()); |
| typeElement.setAttribute(NODE_MODIFIERS, Integer.toString(type.getModifiers())); |
| rootElement.appendChild(typeElement); |
| } |
| |
| Transformer transformer=TransformerFactory.newInstance().newTransformer(); |
| transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$ |
| transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //$NON-NLS-1$ |
| transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$ |
| DOMSource source = new DOMSource(document); |
| StreamResult result = new StreamResult(stream); |
| |
| transformer.transform(source, result); |
| } catch (TransformerException e) { |
| throw createException(e, CorextMessages.TypeInfoHistory_error_serialize); |
| } catch (ParserConfigurationException e) { |
| throw createException(e, CorextMessages.TypeInfoHistory_error_serialize); |
| } |
| } |
| |
| private char[][] getEnclosingNames(Element type) { |
| String enclosingNames= type.getAttribute(NODE_ENCLOSING_NAMES); |
| if (enclosingNames.length() == 0) |
| return EMPTY_ENCLOSING_NAMES; |
| StringTokenizer tokenizer= new StringTokenizer(enclosingNames, "."); //$NON-NLS-1$ |
| List names= new ArrayList(); |
| while(tokenizer.hasMoreTokens()) { |
| String name= tokenizer.nextToken(); |
| names.add(name.toCharArray()); |
| } |
| return (char[][])names.toArray(new char[names.size()][]); |
| } |
| |
| private static JavaUIException createException(Throwable t, String message) { |
| return new JavaUIException(JavaUIStatus.createError(IStatus.ERROR, message, t)); |
| } |
| } |