- /*
- * 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.compiler;
-
- import org.apache.commons.jxpath.ri.Compiler;
-
- /**
- * @author Dmitri Plotnikov
- * @version $Revision: 1.9 $ $Date: 2004/02/29 14:17:39 $
- */
- public class Step {
- private int axis;
- private NodeTest nodeTest;
- private Expression[] predicates;
-
- protected Step(int axis, NodeTest nodeTest, Expression[] predicates) {
- this.axis = axis;
- this.nodeTest = nodeTest;
- this.predicates = predicates;
- }
-
- public int getAxis() {
- return axis;
- }
-
- public NodeTest getNodeTest() {
- return nodeTest;
- }
-
- public Expression[] getPredicates() {
- return predicates;
- }
-
- public boolean isContextDependent() {
- if (predicates != null) {
- for (int i = 0; i < predicates.length; i++) {
- if (predicates[i].isContextDependent()) {
- return true;
- }
- }
- }
- return false;
- }
-
- public String toString() {
- StringBuffer buffer = new StringBuffer();
- int axis = getAxis();
- if (axis == Compiler.AXIS_CHILD) {
- buffer.append(nodeTest);
- }
- else if (axis == Compiler.AXIS_ATTRIBUTE) {
- buffer.append('@');
- buffer.append(nodeTest);
- }
- else if (axis == Compiler.AXIS_SELF
- && nodeTest instanceof NodeTypeTest
- && ((NodeTypeTest) nodeTest).getNodeType()
- == Compiler.NODE_TYPE_NODE) {
- buffer.append(".");
- }
- else if (axis == Compiler.AXIS_PARENT
- && nodeTest instanceof NodeTypeTest
- && ((NodeTypeTest) nodeTest).getNodeType()
- == Compiler.NODE_TYPE_NODE) {
- buffer.append("..");
- }
- else if (axis == Compiler.AXIS_DESCENDANT_OR_SELF
- && nodeTest instanceof NodeTypeTest
- && ((NodeTypeTest) nodeTest).getNodeType()
- == Compiler.NODE_TYPE_NODE
- && (predicates == null || predicates.length == 0)) {
- buffer.append("");
- }
- else {
- buffer.append(axisToString(axis));
- buffer.append("::");
- buffer.append(nodeTest);
- }
- Expression[] predicates = getPredicates();
- if (predicates != null) {
- for (int i = 0; i < predicates.length; i++) {
- buffer.append('[');
- buffer.append(predicates[i]);
- buffer.append(']');
- }
- }
- return buffer.toString();
- }
-
- public static String axisToString(int axis) {
- switch (axis) {
- case Compiler.AXIS_SELF :
- return "self";
- case Compiler.AXIS_CHILD :
- return "child";
- case Compiler.AXIS_PARENT :
- return "parent";
- case Compiler.AXIS_ANCESTOR :
- return "ancestor";
- case Compiler.AXIS_ATTRIBUTE :
- return "attribute";
- case Compiler.AXIS_NAMESPACE :
- return "namespace";
- case Compiler.AXIS_PRECEDING :
- return "preceding";
- case Compiler.AXIS_FOLLOWING :
- return "following";
- case Compiler.AXIS_DESCENDANT :
- return "descendant";
- case Compiler.AXIS_ANCESTOR_OR_SELF :
- return "ancestor-or-self";
- case Compiler.AXIS_FOLLOWING_SIBLING :
- return "following-sibling";
- case Compiler.AXIS_PRECEDING_SIBLING :
- return "preceding-sibling";
- case Compiler.AXIS_DESCENDANT_OR_SELF :
- return "descendant-or-self";
- }
- return "UNKNOWN";
- }
- }