- /*
- * Copyright 1999-2004 The Apache Software Foundation
- *
- * 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.apache.commons.jxpath.ri.axes;
-
- import org.apache.commons.jxpath.Pointer;
- import org.apache.commons.jxpath.ri.EvalContext;
- import org.apache.commons.jxpath.ri.compiler.NodeTest;
- import org.apache.commons.jxpath.ri.model.NodePointer;
-
- /**
- * EvalContext that returns the current node from the parent context if the
- * test succeeds.
- *
- * @author Dmitri Plotnikov
- * @version $Revision: 1.12 $ $Date: 2004/02/29 14:17:37 $
- */
- public class SelfContext extends EvalContext {
- private NodeTest nodeTest;
- private boolean startedSet = false;
- private NodePointer nodePointer;
-
- public SelfContext(EvalContext parentContext, NodeTest nodeTest) {
- super(parentContext);
- this.nodeTest = nodeTest;
- }
-
- public Pointer getSingleNodePointer() {
- return parentContext.getSingleNodePointer();
- }
-
- public NodePointer getCurrentNodePointer() {
- if (position == 0) {
- if (!setPosition(1)) {
- return null;
- }
- }
- return nodePointer;
- }
-
- public boolean nextNode() {
- return setPosition(getCurrentPosition() + 1);
- }
-
- public void reset() {
- super.reset();
- startedSet = false;
- }
-
- public boolean setPosition(int position) {
- if (position != 1) {
- return false;
- }
- super.setPosition(position);
- if (!startedSet) {
- startedSet = true;
- nodePointer = (NodePointer) parentContext.getCurrentNodePointer();
- }
-
- if (nodePointer == null) {
- return false;
- }
-
- return nodeTest == null || nodePointer.testNode(nodeTest);
- }
- }