| /* |
| * 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.api.debugger; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| import org.openide.filesystems.FileObject; |
| import org.openide.filesystems.FileUtil; |
| |
| import org.openide.util.Lookup.Item; |
| import org.openide.util.Lookup.Result; |
| import org.openide.util.LookupEvent; |
| import org.openide.util.LookupListener; |
| import org.openide.util.WeakListeners; |
| import org.openide.util.lookup.Lookups; |
| |
| /** |
| * |
| * @author Martin Entlicher |
| */ |
| class PathLookup extends org.openide.util.Lookup { |
| |
| private final org.openide.util.Lookup delegate; |
| private final String path; |
| |
| PathLookup(String path) { |
| this.delegate = Lookups.forPath(path); |
| this.path = path; |
| } |
| |
| @Override |
| public <T> T lookup(Class<T> clazz) { |
| Item<T> item = lookupItem(new Template<T>(clazz)); |
| return (item == null) ? null : item.getInstance(); |
| } |
| |
| @Override |
| public <T> Result<T> lookup(Template<T> template) { |
| return new PathLookupResult<T>(template.getType(), delegate.lookup(template), path); |
| } |
| |
| @Override |
| public <T> Result<T> lookupResult(Class<T> clazz) { |
| return new PathLookupResult<T>(clazz, delegate.lookupResult(clazz), path); |
| } |
| |
| static class PathLookupResult<T> extends Result<T> { |
| |
| private static final List ORIG_ITEMS = new ArrayList(0); |
| |
| private final Class<T> clazz; |
| private final Result<T> orig; |
| private Collection<Item<T>> items; |
| private final String path; |
| private final LookupListener ll = new PathLookupListener(); |
| private final List<LookupListener> listeners = new ArrayList<LookupListener>(); |
| |
| PathLookupResult(Class<T> clazz, Result<T> orig, String path) { |
| this.clazz = clazz; |
| this.orig = orig; |
| this.path = path; |
| orig.addLookupListener(WeakListeners.create(LookupListener.class, ll, orig)); |
| } |
| |
| @Override |
| public void addLookupListener(LookupListener l) { |
| //orig.addLookupListener(l); |
| synchronized (listeners) { |
| if (!listeners.contains(l)) { |
| listeners.add(l); |
| } |
| } |
| } |
| |
| @Override |
| public void removeLookupListener(LookupListener l) { |
| //orig.removeLookupListener(l); |
| synchronized (listeners) { |
| listeners.remove(l); |
| } |
| } |
| |
| private static <T> List<Item<T>> itemsJustForPath(Class<T> clazz, Result<T> result, String path) { |
| int l = path.length() + 1; |
| Collection<? extends Item<T>> allItems = result.allItems(); |
| List<Item<T>> pathItems = new ArrayList<Item<T>>(allItems.size()); |
| for (Item<T> it : allItems) { |
| String filePath = it.getId(); |
| assert filePath.startsWith(path) : "File path '"+filePath+"' does not start with searched path '"+path+"'"; |
| if (filePath.indexOf('/', l) < l) { |
| // This item is from current folder |
| if (clazz.isInterface()) { |
| // Check whether the lookup item is really declared as an instance of the class we search for: |
| FileObject fo = FileUtil.getConfigFile(filePath+".instance"); |
| if (fo != null) { |
| Object io = fo.getAttribute("instanceOf"); // NOI18N |
| if (io != null) { |
| if (((String) io).indexOf(clazz.getName()) < 0) { |
| continue; |
| } |
| } |
| } |
| } |
| pathItems.add(it); |
| } |
| } |
| if (pathItems.size() == allItems.size()) { |
| return (List<Item<T>>) ORIG_ITEMS; |
| } |
| return pathItems; |
| } |
| |
| private synchronized Collection<Item<T>> getItems() { |
| if (items == null) { |
| items = itemsJustForPath(clazz, orig, path); |
| } |
| return items; |
| } |
| |
| @Override |
| public Collection<? extends T> allInstances() { |
| //return new PathLookupCollection(orig.allInstances(), n); |
| Collection<? extends Item<T>> items = getItems(); |
| if (items == ORIG_ITEMS) { |
| return orig.allInstances(); |
| } |
| ArrayList<T> list = new ArrayList<T>(items.size()); |
| for (Item<T> item : items) { |
| T obj = item.getInstance(); |
| |
| if (clazz.isInstance(obj)) { |
| list.add(obj); |
| } |
| } |
| |
| return Collections.unmodifiableList(list); |
| } |
| |
| @Override |
| public Set<Class<? extends T>> allClasses() { |
| //return new PathLookupSet(orig.allClasses(), n); |
| Collection<? extends Item<T>> items = getItems(); |
| if (items == ORIG_ITEMS) { |
| return orig.allClasses(); |
| } |
| Set<Class<? extends T>> s = new HashSet<Class<? extends T>>(); |
| for (Item<T> item : items) { |
| Class<? extends T> clazz = item.getType(); |
| |
| if (clazz != null) { |
| s.add(clazz); |
| } |
| } |
| s = Collections.unmodifiableSet(s); |
| return s; |
| } |
| |
| @Override |
| public Collection<? extends Item<T>> allItems() { |
| Collection<? extends Item<T>> items = getItems(); |
| if (items == ORIG_ITEMS) { |
| return orig.allItems(); |
| } else { |
| return items; |
| } |
| } |
| |
| private class PathLookupListener implements LookupListener { |
| |
| @Override |
| public void resultChanged(LookupEvent ev) { |
| synchronized (PathLookupResult.this) { |
| items = null; |
| } |
| List<LookupListener> lls; |
| synchronized (listeners) { |
| if (listeners.isEmpty()) { |
| return; |
| } else { |
| lls = new ArrayList<LookupListener>(listeners); |
| } |
| } |
| LookupEvent lev = new LookupEvent(PathLookupResult.this); |
| for (LookupListener ll : lls) { |
| ll.resultChanged(lev); |
| } |
| } |
| |
| } |
| |
| } |
| |
| } |