| /******************************************************************************* |
| * Copyright (c) 2008 Oracle Corporation. |
| * 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: |
| * Cameron Bateman - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jst.jsf.designtime.internal.view.model.jsp; |
| |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Serializable; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.eclipse.jst.jsf.common.runtime.internal.view.model.common.ITagAttributeHandler; |
| import org.eclipse.jst.jsf.core.internal.JSFCorePlugin; |
| import org.eclipse.jst.jsf.designtime.internal.view.model.jsp.IAttributeAdvisor.UnknownAttributeException; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.tld.provisional.TLDElementDeclaration; |
| import org.eclipse.wst.xml.core.internal.contentmodel.CMAttributeDeclaration; |
| |
| /** |
| * Adapts TLDDocument attributes to a simple map of ITagAttributeHandler. Map is |
| * unmodifiable. |
| * |
| * @author cbateman |
| * |
| */ |
| public class CMNodeNamedMapAdapter implements |
| Map<String, ITagAttributeHandler>, Serializable |
| { |
| /** |
| * serializable id |
| */ |
| private static final long serialVersionUID = -4188412823197830484L; |
| private transient final TLDElementDeclaration _tldElement; |
| private transient final IAttributeAdvisor _advisor; |
| private transient AtomicBoolean _isInitialized = new AtomicBoolean(false); |
| private final Map<String, ITagAttributeHandler> _cache; |
| |
| /** |
| * @param tldDoc |
| * @param advisor |
| */ |
| public CMNodeNamedMapAdapter(final TLDElementDeclaration tldDoc, |
| final IAttributeAdvisor advisor) |
| { |
| _tldElement = tldDoc; |
| _advisor = advisor; |
| _cache = new HashMap<String, ITagAttributeHandler>(); |
| } |
| |
| public boolean containsKey(Object key) |
| { |
| ensureAllAttributes(); |
| return _cache.containsKey(key); |
| } |
| |
| public boolean containsValue(Object value) |
| { |
| ensureAllAttributes(); |
| return _cache.containsValue(value); |
| } |
| |
| public Set<java.util.Map.Entry<String, ITagAttributeHandler>> entrySet() |
| { |
| ensureAllAttributes(); |
| return _cache.entrySet(); |
| } |
| |
| |
| public ITagAttributeHandler get(Object key) |
| { |
| if (key instanceof String) |
| { |
| return getOrCreateAttribute((String) key); |
| } |
| return null; |
| } |
| |
| public boolean isEmpty() |
| { |
| return size() == 0; |
| } |
| |
| public Set<String> keySet() |
| { |
| ensureAllAttributes(); |
| return Collections.unmodifiableSet(_cache.keySet()); |
| } |
| |
| public int size() |
| { |
| if (_tldElement != null) |
| { |
| return _tldElement.getAttributes().getLength(); |
| } |
| return _cache.size(); |
| } |
| |
| public Collection<ITagAttributeHandler> values() |
| { |
| ensureAllAttributes(); |
| return Collections.unmodifiableCollection(_cache.values()); |
| } |
| |
| private synchronized ITagAttributeHandler getOrCreateAttribute(final String name) |
| { |
| ITagAttributeHandler tagAttr = _cache.get(name); |
| |
| if (tagAttr == null) |
| { |
| try |
| { |
| tagAttr = _advisor.createAttributeHandler(name); |
| _cache.put(name, tagAttr); |
| } |
| catch (UnknownAttributeException e) |
| { |
| JSFCorePlugin.log(e, "Trying to get attribute for "+name); |
| } |
| } |
| |
| return tagAttr; |
| } |
| |
| private void ensureAllAttributes() |
| { |
| if (_isInitialized.compareAndSet(false, true)) |
| { |
| for (final Iterator it = _tldElement.getAttributes().iterator(); it.hasNext();) |
| { |
| final CMAttributeDeclaration attrDecl = (CMAttributeDeclaration) it.next(); |
| getOrCreateAttribute(attrDecl.getAttrName()); |
| } |
| } |
| } |
| |
| public void clear() |
| { |
| throw new UnsupportedOperationException("Cannot modify map"); |
| } |
| |
| public ITagAttributeHandler put(String key, ITagAttributeHandler value) |
| { |
| throw new UnsupportedOperationException("Cannot modify map"); |
| } |
| |
| public void putAll(Map<? extends String, ? extends ITagAttributeHandler> t) |
| { |
| throw new UnsupportedOperationException("Cannot modify map"); |
| } |
| |
| public ITagAttributeHandler remove(Object key) |
| { |
| throw new UnsupportedOperationException("Cannot modify map"); |
| } |
| |
| private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException |
| { |
| in.defaultReadObject(); |
| _isInitialized = new AtomicBoolean(true); |
| } |
| |
| private void writeObject(final ObjectOutputStream out) throws IOException |
| { |
| ensureAllAttributes(); |
| out.defaultWriteObject(); |
| } |
| } |