| /****************************************************************************** |
| * Copyright (c) 2006 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.gmf.runtime.emf.type.core; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.Set; |
| import java.util.regex.Pattern; |
| |
| import org.eclipse.gmf.runtime.emf.type.core.internal.descriptors.IEditHelperAdviceDescriptor; |
| |
| /** |
| * The implementation of the client context interface. |
| * <p> |
| * This class may be instantiated or subclassed by clients. |
| * |
| * @author ldamus |
| */ |
| public class ClientContext implements IClientContext { |
| |
| private final String id; |
| |
| private final IElementMatcher matcher; |
| |
| // set of String type and advice IDs that are bound to me |
| private final Set typeIdBindings = new java.util.HashSet(); |
| |
| // set of regex patterns that are bound to me |
| private final Set patternBindings = new java.util.HashSet(); |
| |
| /** |
| * Initializes me with my ID and my element matcher. |
| * |
| * @param id |
| * my unique identifier |
| * @param matcher |
| * my element matcher |
| */ |
| public ClientContext(String id, IElementMatcher matcher) { |
| this.id = id; |
| this.matcher = matcher; |
| } |
| |
| public final String getId() { |
| return id; |
| } |
| |
| public final IElementMatcher getMatcher() { |
| return matcher; |
| } |
| |
| public boolean includes(IEditHelperAdviceDescriptor adviceDescriptor) { |
| return includes(adviceDescriptor.getId()); |
| } |
| |
| public boolean includes(IElementTypeDescriptor elementTypeDescriptor) { |
| return includes(elementTypeDescriptor.getId()); |
| } |
| |
| public boolean includes(IElementType elementType) { |
| return includes(elementType.getId()); |
| } |
| |
| private boolean includes(String _id) { |
| boolean result = false; |
| |
| result = typeIdBindings.contains(_id); |
| |
| if (!result && !patternBindings.isEmpty()) { |
| // look for a bound pattern |
| result = hasPatternBindingFor(_id); |
| |
| if (result) { |
| // cache the result for this type |
| bindId(_id); |
| } |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Determines whether any of my pattern bindings matches the |
| * <code>toMatch</code> string. |
| * |
| * @param toMatch |
| * the string to be matched |
| * @return <code>true</code> if any of my pattern bindings matches the |
| * <code>toMatch</code> string; <code>false</code>, otherwise |
| */ |
| private boolean hasPatternBindingFor(String toMatch) { |
| |
| for (Iterator iter = patternBindings.iterator(); iter.hasNext();) { |
| Pattern pattern = (Pattern) iter.next(); |
| |
| if (pattern.matcher(toMatch).matches()) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| public void bindId(String typeId) { |
| typeIdBindings.add(typeId); |
| } |
| |
| public void bindPattern(Pattern pattern) { |
| patternBindings.add(pattern); |
| } |
| |
| /** |
| * Has no children. |
| */ |
| public Collection getChildren() { |
| return Collections.EMPTY_LIST; |
| } |
| |
| /** |
| * Not a multi-context. |
| */ |
| public boolean isMultiClientContext() { |
| return false; |
| } |
| |
| /** |
| * The context ID fully determines equality. |
| */ |
| public boolean equals(Object obj) { |
| return (obj instanceof ClientContext) |
| && ((ClientContext) obj).getId().equals(getId()); |
| } |
| |
| /** |
| * The context ID fully determines equality. |
| */ |
| public int hashCode() { |
| return getId().hashCode(); |
| } |
| |
| public String toString() { |
| return "ClientContext[" + getId() + ']'; //$NON-NLS-1$ |
| } |
| } |