| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * 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 groovy.util.slurpersupport; |
| |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation; |
| |
| import groovy.lang.Closure; |
| |
| /** |
| * @author John Wilson |
| */ |
| |
| public class FilteredNodeChildren extends NodeChildren { |
| private final Closure closure; |
| |
| public FilteredNodeChildren(final GPathResult parent, final Closure closure, final Map namespaceTagHints) { |
| super(parent, parent.name, namespaceTagHints); |
| this.closure = closure; |
| } |
| |
| public Iterator iterator() { |
| return new Iterator() { |
| final Iterator iter = FilteredNodeChildren.this.parent.iterator(); |
| Object next = null; |
| |
| public boolean hasNext() { |
| while (this.iter.hasNext()) { |
| final Object childNode = this.iter.next(); |
| if (closureYieldsTrueForNode(childNode)) { |
| this.next = childNode; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public Object next() { |
| return this.next; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| |
| public Iterator nodeIterator() { |
| return new NodeIterator(this.parent.nodeIterator()) { |
| protected Object getNextNode(final Iterator iter) { |
| while (iter.hasNext()) { |
| final Object node = iter.next(); |
| if (closureYieldsTrueForNode(new NodeChild((Node) node, FilteredNodeChildren.this.parent, FilteredNodeChildren.this.namespaceTagHints))) { |
| return node; |
| } |
| } |
| return null; |
| } |
| }; |
| } |
| |
| private boolean closureYieldsTrueForNode(Object childNode) { |
| return DefaultTypeTransformation.castToBoolean(FilteredNodeChildren.this.closure.call(new Object[]{childNode})); |
| } |
| } |