| /* |
| * 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: XPathFactoryImpl.java 468655 2006-10-28 07:12:06Z minchau $ |
| |
| package org.apache.xpath.jaxp; |
| |
| import org.apache.xpath.res.XPATHErrorResources; |
| import org.apache.xalan.res.XSLMessages; |
| |
| import javax.xml.XMLConstants; |
| import javax.xml.xpath.XPathFactory; |
| import javax.xml.xpath.XPathFactoryConfigurationException; |
| import javax.xml.xpath.XPathFunctionResolver; |
| import javax.xml.xpath.XPathVariableResolver; |
| |
| /** |
| * The XPathFactory builds XPaths. |
| * |
| * @version $Revision: 468655 $ |
| * @author Ramesh Mandava |
| */ |
| public class XPathFactoryImpl extends XPathFactory { |
| |
| /** |
| * <p>Name of class as a constant to use for debugging.</p> |
| */ |
| private static final String CLASS_NAME = "XPathFactoryImpl"; |
| |
| /** |
| *<p>XPathFunctionResolver for this XPathFactory and created XPaths.</p> |
| */ |
| private XPathFunctionResolver xPathFunctionResolver = null; |
| |
| /** |
| * <p>XPathVariableResolver for this XPathFactory and created XPaths</p> |
| */ |
| private XPathVariableResolver xPathVariableResolver = null; |
| |
| /** |
| * <p>State of secure processing feature.</p> |
| */ |
| private boolean featureSecureProcessing = false; |
| |
| /** |
| * <p>Is specified object model supported by this |
| * <code>XPathFactory</code>?</p> |
| * |
| * @param objectModel Specifies the object model which the returned |
| * <code>XPathFactory</code> will understand. |
| * |
| * @return <code>true</code> if <code>XPathFactory</code> supports |
| * <code>objectModel</code>, else <code>false</code>. |
| * |
| * @throws NullPointerException If <code>objectModel</code> is <code>null</code>. |
| * @throws IllegalArgumentException If <code>objectModel.length() == 0</code>. |
| */ |
| public boolean isObjectModelSupported(String objectModel) { |
| |
| if (objectModel == null) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_OBJECT_MODEL_NULL, |
| new Object[] { this.getClass().getName() } ); |
| |
| throw new NullPointerException( fmsg ); |
| } |
| |
| if (objectModel.length() == 0) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_OBJECT_MODEL_EMPTY, |
| new Object[] { this.getClass().getName() } ); |
| throw new IllegalArgumentException( fmsg ); |
| } |
| |
| // know how to support default object model, W3C DOM |
| if (objectModel.equals(XPathFactory.DEFAULT_OBJECT_MODEL_URI)) { |
| return true; |
| } |
| |
| // don't know how to support anything else |
| return false; |
| } |
| |
| /** |
| * <p>Returns a new <code>XPath</code> object using the underlying |
| * object model determined when the factory was instantiated.</p> |
| * |
| * @return New <code>XPath</code> |
| */ |
| public javax.xml.xpath.XPath newXPath() { |
| return new org.apache.xpath.jaxp.XPathImpl( |
| xPathVariableResolver, xPathFunctionResolver, |
| featureSecureProcessing ); |
| } |
| |
| /** |
| * <p>Set a feature for this <code>XPathFactory</code> and |
| * <code>XPath</code>s created by this factory.</p> |
| * |
| * <p> |
| * Feature names are fully qualified {@link java.net.URI}s. |
| * Implementations may define their own features. |
| * An {@link XPathFactoryConfigurationException} is thrown if this |
| * <code>XPathFactory</code> or the <code>XPath</code>s |
| * it creates cannot support the feature. |
| * It is possible for an <code>XPathFactory</code> to expose a feature |
| * value but be unable to change its state. |
| * </p> |
| * |
| * <p>See {@link javax.xml.xpath.XPathFactory} for full documentation |
| * of specific features.</p> |
| * |
| * @param name Feature name. |
| * @param value Is feature state <code>true</code> or <code>false</code>. |
| * |
| * @throws XPathFactoryConfigurationException if this |
| * <code>XPathFactory</code> or the <code>XPath</code>s |
| * it creates cannot support this feature. |
| * @throws NullPointerException if <code>name</code> is |
| * <code>null</code>. |
| */ |
| public void setFeature(String name, boolean value) |
| throws XPathFactoryConfigurationException { |
| |
| // feature name cannot be null |
| if (name == null) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_FEATURE_NAME_NULL, |
| new Object[] { CLASS_NAME, new Boolean( value) } ); |
| throw new NullPointerException( fmsg ); |
| } |
| |
| // secure processing? |
| if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) { |
| |
| featureSecureProcessing = value; |
| |
| // all done processing feature |
| return; |
| } |
| |
| // unknown feature |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_FEATURE_UNKNOWN, |
| new Object[] { name, CLASS_NAME, new Boolean(value) } ); |
| throw new XPathFactoryConfigurationException( fmsg ); |
| } |
| |
| /** |
| * <p>Get the state of the named feature.</p> |
| * |
| * <p> |
| * Feature names are fully qualified {@link java.net.URI}s. |
| * Implementations may define their own features. |
| * An {@link XPathFactoryConfigurationException} is thrown if this |
| * <code>XPathFactory</code> or the <code>XPath</code>s |
| * it creates cannot support the feature. |
| * It is possible for an <code>XPathFactory</code> to expose a feature |
| * value but be unable to change its state. |
| * </p> |
| * |
| * @param name Feature name. |
| * |
| * @return State of the named feature. |
| * |
| * @throws XPathFactoryConfigurationException if this |
| * <code>XPathFactory</code> or the <code>XPath</code>s |
| * it creates cannot support this feature. |
| * @throws NullPointerException if <code>name</code> is |
| * <code>null</code>. |
| */ |
| public boolean getFeature(String name) |
| throws XPathFactoryConfigurationException { |
| |
| // feature name cannot be null |
| if (name == null) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_GETTING_NULL_FEATURE, |
| new Object[] { CLASS_NAME } ); |
| throw new NullPointerException( fmsg ); |
| } |
| |
| // secure processing? |
| if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) { |
| return featureSecureProcessing; |
| } |
| |
| // unknown feature |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_GETTING_UNKNOWN_FEATURE, |
| new Object[] { name, CLASS_NAME } ); |
| |
| throw new XPathFactoryConfigurationException( fmsg ); |
| } |
| |
| /** |
| * <p>Establish a default function resolver.</p> |
| * |
| * <p>Any <code>XPath</code> objects constructed from this factory will use |
| * the specified resolver by default.</p> |
| * |
| * <p>A <code>NullPointerException</code> is thrown if |
| * <code>resolver</code> is <code>null</code>.</p> |
| * |
| * @param resolver XPath function resolver. |
| * |
| * @throws NullPointerException If <code>resolver</code> is |
| * <code>null</code>. |
| */ |
| public void setXPathFunctionResolver(XPathFunctionResolver resolver) { |
| |
| // resolver cannot be null |
| if (resolver == null) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_NULL_XPATH_FUNCTION_RESOLVER, |
| new Object[] { CLASS_NAME } ); |
| throw new NullPointerException( fmsg ); |
| } |
| |
| xPathFunctionResolver = resolver; |
| } |
| |
| /** |
| * <p>Establish a default variable resolver.</p> |
| * |
| * <p>Any <code>XPath</code> objects constructed from this factory will use |
| * the specified resolver by default.</p> |
| * |
| * <p>A <code>NullPointerException</code> is thrown if <code>resolver</code> is <code>null</code>.</p> |
| * |
| * @param resolver Variable resolver. |
| * |
| * @throws NullPointerException If <code>resolver</code> is |
| * <code>null</code>. |
| */ |
| public void setXPathVariableResolver(XPathVariableResolver resolver) { |
| |
| // resolver cannot be null |
| if (resolver == null) { |
| String fmsg = XSLMessages.createXPATHMessage( |
| XPATHErrorResources.ER_NULL_XPATH_VARIABLE_RESOLVER, |
| new Object[] { CLASS_NAME } ); |
| throw new NullPointerException( fmsg ); |
| } |
| |
| xPathVariableResolver = resolver; |
| } |
| } |
| |
| |
| |