| /******************************************************************************* |
| * Copyright (c) 2004, 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.ui.internal.preferences; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.eclipse.ui.internal.util.Util; |
| |
| /** |
| * @since 3.1 |
| */ |
| public class PropertyMapUnion implements IPropertyMap { |
| |
| private Map values; |
| |
| private final static class PropertyInfo { |
| Object value; |
| boolean commonAttribute; |
| |
| PropertyInfo(Object value, boolean commonAttribute) { |
| this.value = value; |
| this.commonAttribute = commonAttribute; |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.preferences.IPropertyMap#keySet() |
| */ |
| public Set keySet() { |
| return values.keySet(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.preferences.IPropertyMap#getValue(java.lang.String, java.lang.Class) |
| */ |
| public Object getValue(String propertyId, Class propertyType) { |
| PropertyInfo info = (PropertyInfo)values.get(propertyId); |
| |
| if (info == null) { |
| return null; |
| } |
| |
| Object value = info.value; |
| |
| if (propertyType.isInstance(value)) { |
| return value; |
| } |
| |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.preferences.IPropertyMap#isCommonProperty(java.lang.String) |
| */ |
| public boolean isCommonProperty(String propertyId) { |
| PropertyInfo info = (PropertyInfo)values.get(propertyId); |
| |
| if (info == null) { |
| return false; |
| } |
| |
| return info.commonAttribute; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.preferences.IPropertyMap#propertyExists(java.lang.String) |
| */ |
| public boolean propertyExists(String propertyId) { |
| return values.get(propertyId) != null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.internal.preferences.IPropertyMap#setValue(java.lang.String, java.lang.Object) |
| */ |
| public void setValue(String propertyId, Object newValue) { |
| PropertyInfo info = new PropertyInfo(newValue, true); |
| |
| values.put(propertyId, info); |
| } |
| |
| public void addMap(IPropertyMap toAdd) { |
| Set keySet = toAdd.keySet(); |
| |
| // Update any existing attributes |
| for (Iterator iter = keySet().iterator(); iter.hasNext();) { |
| String key = (String) iter.next(); |
| |
| PropertyInfo localInfo = (PropertyInfo)values.get(key); |
| // Shouldn't be null, but just in case... |
| if (localInfo != null) { |
| // If the attribute exists in the new map |
| if (toAdd.propertyExists(key)) { |
| // Determine if the value is common |
| Object value = toAdd.getValue(key, Object.class); |
| |
| if (!Util.equals(value, toAdd.getValue(key, Object.class))) { |
| // Set the value to null if not common |
| localInfo.value = null; |
| } |
| |
| // The attribute must be common in both the receiver and the new map to be common |
| // everywhere |
| localInfo.commonAttribute = localInfo.commonAttribute && toAdd.isCommonProperty(key); |
| } else { |
| // If the attribute doesn't exist in the new map, it cannot be common |
| localInfo.commonAttribute = false; |
| } |
| } |
| } |
| |
| // Add any new attributes that exist in the target |
| for (Iterator iter = keySet.iterator(); iter.hasNext();) { |
| String element = (String) iter.next(); |
| |
| PropertyInfo localInfo = (PropertyInfo)values.get(element); |
| if (localInfo == null) { |
| Object value = toAdd.getValue(element, Object.class); |
| |
| boolean isCommon = toAdd.isCommonProperty(element); |
| |
| localInfo = new PropertyInfo(value, isCommon); |
| values.put(element, localInfo); |
| } |
| } |
| } |
| |
| public void removeValue(String propertyId) { |
| values.remove(propertyId); |
| } |
| } |