| /* |
| * Copyright 2007 Sascha Weinreuter |
| * |
| * Licensed 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.intellij.plugins.relaxNG.model.descriptors; |
| |
| import org.kohsuke.rngom.digested.DAttributePattern; |
| import org.kohsuke.rngom.digested.DElementPattern; |
| import org.kohsuke.rngom.digested.DPattern; |
| import org.kohsuke.rngom.digested.DRefPattern; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| class ChildElementFinder extends RecursionSaveWalker { |
| private final List<DElementPattern> myRoots = new ArrayList<DElementPattern>(); |
| |
| private final int myTargetDepth; |
| private int myDepth; |
| |
| private ChildElementFinder(int targetDepth) { |
| myTargetDepth = targetDepth; |
| } |
| |
| @Override |
| public Void onRef(DRefPattern p) { |
| if (myDepth < myTargetDepth || myTargetDepth == -1) { |
| return super.onRef(p); |
| } |
| return null; |
| } |
| |
| @Override |
| public Void onElement(DElementPattern p) { |
| myDepth++; |
| try { |
| if (myDepth == myTargetDepth || myTargetDepth == -1) { |
| myRoots.add(p); |
| return myTargetDepth != -1 ? null : super.onElement(p); |
| } else { |
| return super.onElement(p); |
| } |
| } finally { |
| myDepth--; |
| } |
| } |
| |
| @Override |
| public Void onAttribute(DAttributePattern p) { |
| return null; |
| } |
| |
| static List<DElementPattern> find(int targetDepth, DPattern p) { |
| final ChildElementFinder finder = new ChildElementFinder(targetDepth); |
| finder.doAccept(p); |
| return finder.myRoots; |
| } |
| |
| static List<DElementPattern> find(DPattern p) { |
| return find(1, p); |
| } |
| } |