001 /* 002 * Copyright 2005 John G. Wilson 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 */ 017 018 package groovy.util.slurpersupport; 019 020 import java.util.Iterator; 021 import java.util.Map; 022 023 import groovy.lang.Closure; 024 025 /** 026 * @author John Wilson 027 * 028 */ 029 030 public class FilteredNodeChildren extends NodeChildren { 031 private final Closure closure; 032 033 public FilteredNodeChildren(final GPathResult parent, final Closure closure, final Map namespaceTagHints) { 034 super(parent, parent.name, namespaceTagHints); 035 this.closure = closure; 036 } 037 038 /* (non-Javadoc) 039 * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeChildren#iterator() 040 */ 041 public Iterator nodeIterator() { 042 return new NodeIterator(this.parent.iterator()) { 043 /* (non-Javadoc) 044 * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeIterator#getNextNode(java.util.Iterator) 045 */ 046 protected Object getNextNode(final Iterator iter) { 047 while (iter.hasNext()) { 048 final Object node = iter.next(); 049 final Boolean result = (Boolean)FilteredNodeChildren.this.closure.call(new Object[]{node}); 050 051 if (result != null && result.booleanValue()) { 052 return node; 053 } 054 } 055 056 return null; 057 } 058 }; 059 } 060 061 }