001 /* 002 /* 003 * Copyright 2005 John G. Wilson 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018 019 package groovy.util.slurpersupport; 020 021 import java.util.Iterator; 022 import java.util.Map; 023 024 import groovy.lang.Closure; 025 026 /** 027 * @author John Wilson 028 * 029 */ 030 031 public class FilteredAttributes extends Attributes { 032 private final Closure closure; 033 034 public FilteredAttributes(final GPathResult parent, final Closure closure, final Map namespaceTagHints) { 035 super(parent, parent.name, namespaceTagHints); 036 this.closure = closure; 037 } 038 039 /* (non-Javadoc) 040 * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeChildren#iterator() 041 */ 042 public Iterator nodeIterator() { 043 return new NodeIterator(this.parent.iterator()) { 044 /* (non-Javadoc) 045 * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeIterator#getNextNode(java.util.Iterator) 046 */ 047 protected Object getNextNode(final Iterator iter) { 048 while (iter.hasNext()) { 049 final Object node = iter.next(); 050 final Boolean result = (Boolean)FilteredAttributes.this.closure.call(new Object[]{node}); 051 052 if (result != null && result.booleanValue()) { 053 return node; 054 } 055 } 056 057 return null; 058 } 059 }; 060 } 061 062 }