| package org.apache.maven.shared.utils.xml; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * |
| */ |
| public class Xpp3DomUtils |
| { |
| /** |
| * @param dominant {@link Xpp3Dom} |
| * @param recessive {@link Xpp3Dom} |
| * @param childMergeOverride true/false. |
| * @return Merged dom. |
| */ |
| public static Xpp3Dom mergeXpp3Dom( Xpp3Dom dominant, Xpp3Dom recessive, Boolean childMergeOverride ) |
| { |
| return dominant != null ? merge( dominant, recessive, childMergeOverride ) : recessive; |
| } |
| |
| /** |
| * @param dominant {@link Xpp3Dom} |
| * @param recessive {@link Xpp3Dom} |
| * @return Merged dom. |
| */ |
| public static Xpp3Dom mergeXpp3Dom( Xpp3Dom dominant, Xpp3Dom recessive ) |
| { |
| return dominant != null ? merge( dominant, recessive, null ) : recessive; |
| } |
| |
| /** |
| * @param dominant {@link Xpp3Dom} |
| * @param recessive {@link Xpp3Dom} |
| * @param childMergeOverride true/false. |
| * @return Merged dom. |
| */ |
| public static Xpp3Dom merge( Xpp3Dom dominant, Xpp3Dom recessive, Boolean childMergeOverride ) |
| { |
| if ( recessive == null || isCombineSelfOverride( dominant ) ) |
| { |
| return dominant; |
| } |
| |
| if ( isEmpty( dominant.getValue() ) ) |
| { |
| dominant.setValue( recessive.getValue() ); |
| } |
| |
| for ( String attr : recessive.getAttributeNames() ) |
| { |
| if ( isEmpty( dominant.getAttribute( attr ) ) ) |
| { |
| dominant.setAttribute( attr, recessive.getAttribute( attr ) ); |
| } |
| } |
| |
| if ( recessive.getChildCount() > 0 ) |
| { |
| boolean mergeChildren = isMergeChildren( dominant, childMergeOverride ); |
| |
| if ( mergeChildren ) |
| { |
| Map<String, Iterator<Xpp3Dom>> commonChildren = getCommonChildren( dominant, recessive ); |
| for ( Xpp3Dom recessiveChild : recessive ) |
| { |
| Iterator<Xpp3Dom> it = commonChildren.get( recessiveChild.getName() ); |
| if ( it == null ) |
| { |
| dominant.addChild( new Xpp3Dom( recessiveChild ) ); |
| } |
| else if ( it.hasNext() ) |
| { |
| Xpp3Dom dominantChild = it.next(); |
| merge( dominantChild, recessiveChild, childMergeOverride ); |
| } |
| } |
| } |
| else |
| { |
| Xpp3Dom[] dominantChildren = dominant.getChildren(); |
| dominant.childList.clear(); |
| for ( Xpp3Dom child : recessive ) |
| { |
| dominant.addChild( new Xpp3Dom( child ) ); |
| } |
| |
| for ( Xpp3Dom aDominantChildren : dominantChildren ) |
| { |
| dominant.addChild( aDominantChildren ); |
| } |
| } |
| } |
| return dominant; |
| } |
| |
| private static Map<String, Iterator<Xpp3Dom>> getCommonChildren( Xpp3Dom dominant, Xpp3Dom recessive ) |
| { |
| Map<String, Iterator<Xpp3Dom>> commonChildren = new HashMap<>(); |
| |
| for ( String childName : recessive.childMap.keySet() ) |
| { |
| List<Xpp3Dom> dominantChildren = dominant.getChildrenList( childName ); |
| if ( dominantChildren.size() > 0 ) |
| { |
| commonChildren.put( childName, dominantChildren.iterator() ); |
| } |
| } |
| return commonChildren; |
| } |
| |
| private static boolean isCombineSelfOverride( Xpp3Dom xpp3Dom ) |
| { |
| String selfMergeMode = xpp3Dom.getAttribute( Xpp3Dom.SELF_COMBINATION_MODE_ATTRIBUTE ); |
| return Xpp3Dom.SELF_COMBINATION_OVERRIDE.equals( selfMergeMode ); |
| } |
| |
| private static boolean isMergeChildren( Xpp3Dom dominant, Boolean override ) |
| { |
| return override != null ? override : !isMergeChildren( dominant ); |
| } |
| |
| private static boolean isMergeChildren( Xpp3Dom dominant ) |
| { |
| return Xpp3Dom.CHILDREN_COMBINATION_APPEND.equals( |
| dominant.getAttribute( Xpp3Dom.CHILDREN_COMBINATION_MODE_ATTRIBUTE ) ); |
| } |
| |
| /** |
| * @param str The string to be checked. |
| * @return <code>true</code> in case string is empty <code>false</code> otherwise. |
| */ |
| public static boolean isEmpty( String str ) |
| { |
| return str == null || str.trim().length() == 0; |
| } |
| |
| |
| |
| |
| } |