| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| * |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.lenya.xml; |
| |
| import java.util.StringTokenizer; |
| |
| import org.w3c.dom.Node; |
| |
| /** |
| * Helper class for XPath operations |
| */ |
| public class XPath { |
| String xpath = null; |
| String[] parts = null; |
| |
| /** |
| * Constructor |
| * @param _xpath The Xpath |
| */ |
| public XPath(String _xpath) { |
| this.xpath = _xpath; |
| |
| StringTokenizer st = new StringTokenizer(_xpath, "/"); |
| int length = st.countTokens(); |
| this.parts = new String[length]; |
| |
| for (int i = 0; i < length; i++) { |
| this.parts[i] = st.nextToken(); |
| } |
| } |
| |
| /** |
| * Get the parent path |
| * @return The parent path |
| */ |
| public XPath getParent() { |
| StringBuffer buf = new StringBuffer(); |
| |
| for (int i = 0; i < (this.parts.length - 1); i++) { |
| buf.append("/" + this.parts[i]); |
| } |
| |
| return new XPath(buf.toString()); |
| } |
| |
| /** |
| * Get the type of a node. Only supports attribute and element nodes |
| * @return The node type |
| */ |
| public short getType() { |
| if (this.parts[this.parts.length - 1].indexOf("@") == 0) { |
| return Node.ATTRIBUTE_NODE; |
| } |
| return Node.ELEMENT_NODE; |
| } |
| |
| /** |
| * Return a string representation of the XPath |
| * @return The Xpath |
| */ |
| public String toString() { |
| return this.xpath; |
| } |
| |
| /** |
| * Get the name |
| * @return The name |
| */ |
| public String getName() { |
| if (getType() == Node.ATTRIBUTE_NODE) { |
| return this.parts[this.parts.length - 1].substring(1); |
| } |
| return this.parts[this.parts.length - 1]; |
| } |
| |
| /** |
| * Return the name of the element |
| * @return the name of the element |
| */ |
| public String getElementName() { |
| if (getType() == Node.ATTRIBUTE_NODE) { |
| return this.parts[this.parts.length - 2]; |
| } |
| return this.parts[this.parts.length - 1]; |
| } |
| |
| /** |
| * Get the name without predicates |
| * @return The name without predicates |
| */ |
| public String getNameWithoutPredicates() { |
| return removePredicates(getName()); |
| } |
| |
| /** |
| * Remove predicates (square brackets), http://www.w3.org/TR/xpath |
| * @param s The string to remove predicates from |
| * @return The string without predicates |
| */ |
| public String removePredicates(String s) { |
| int index = s.indexOf("["); |
| |
| if (index >= 0) { |
| return s.substring(0, index); |
| } |
| |
| return s; |
| } |
| } |