| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.netbeans.modules.debugger.jpda.projects; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import org.openide.filesystems.FileAttributeEvent; |
| import org.openide.filesystems.FileChangeListener; |
| import org.openide.filesystems.FileEvent; |
| import org.openide.filesystems.FileObject; |
| import org.openide.filesystems.FileRenameEvent; |
| import org.openide.util.BaseUtilities; |
| import org.openide.util.WeakSet; |
| |
| /** |
| * Field line number cache. |
| * @author martin |
| */ |
| final class FieldLNCache { |
| |
| private final Set<FileObject> knownFiles = Collections.synchronizedSet(new WeakSet<>()); |
| private final Set<FileKey> knownFileRefs = Collections.synchronizedSet(new HashSet<>()); |
| private final Map<FieldKey, Integer> fieldLines = new LinkedHashMap<>(); |
| |
| void putLine(String url, String className, String fieldName, FileObject fo, |
| int lineNumber) { |
| if (!knownFiles.contains(fo)) { |
| fo.addFileChangeListener(new FileChangeListenerImpl(url)); |
| knownFileRefs.add(new FileKey(fo, url)); |
| } |
| synchronized (fieldLines) { |
| fieldLines.put(new FieldKey(url, className, fieldName), lineNumber); |
| } |
| } |
| |
| Integer getLine(String url, String className, String fieldName) { |
| synchronized (fieldLines) { |
| return fieldLines.get(new FieldKey(url, className, fieldName)); |
| } |
| } |
| |
| private void removeFieldLines(String url) { |
| synchronized (fieldLines) { |
| Iterator<FieldKey> fieldIt = fieldLines.keySet().iterator(); |
| while (fieldIt.hasNext()) { |
| FieldKey field = fieldIt.next(); |
| if (field.url.equals(url)) { |
| fieldIt.remove(); |
| } |
| } |
| } |
| } |
| |
| private static class FieldKey { |
| private final String url; |
| private final String className; |
| private final String fieldName; |
| private final int hash; |
| |
| public FieldKey(String url, String className, String fieldName) { |
| this.url = url; |
| this.className = className; |
| this.fieldName = fieldName; |
| this.hash = Objects.hash(url, className, fieldName); |
| } |
| |
| @Override |
| public int hashCode() { |
| return hash; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| final FieldKey other = (FieldKey) obj; |
| if (!Objects.equals(this.url, other.url)) { |
| return false; |
| } |
| if (!Objects.equals(this.className, other.className)) { |
| return false; |
| } |
| if (!Objects.equals(this.fieldName, other.fieldName)) { |
| return false; |
| } |
| return true; |
| } |
| } |
| |
| private class FileKey extends WeakReference<FileObject> implements Runnable { |
| |
| private final String url; |
| |
| FileKey(FileObject fo, String url) { |
| super(fo, BaseUtilities.activeReferenceQueue()); |
| this.url = url; |
| } |
| |
| @Override |
| public void run() { |
| removeFieldLines(url); |
| knownFileRefs.remove(this); |
| } |
| |
| } |
| |
| private class FileChangeListenerImpl implements FileChangeListener { |
| |
| private final String url; |
| |
| FileChangeListenerImpl(String url) { |
| this.url = url; |
| } |
| |
| @Override |
| public void fileFolderCreated(FileEvent fe) {} |
| |
| @Override |
| public void fileDataCreated(FileEvent fe) {} |
| |
| @Override |
| public void fileChanged(FileEvent fe) { |
| removeFieldLines(url); |
| } |
| |
| @Override |
| public void fileDeleted(FileEvent fe) { |
| removeFieldLines(url); |
| knownFiles.remove(fe.getFile()); |
| } |
| |
| @Override |
| public void fileRenamed(FileRenameEvent fe) { |
| removeFieldLines(url); |
| knownFiles.remove(fe.getFile()); // url changes |
| } |
| |
| @Override |
| public void fileAttributeChanged(FileAttributeEvent fe) {} |
| |
| } |
| |
| } |