org.compass.core.util.DTDEntityResolver Maven / Gradle / Ivy
/*
* Copyright 2004-2009 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 org.compass.core.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.Serializable;
import org.compass.core.config.ConfigurationException;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
public class DTDEntityResolver implements EntityResolver, Serializable {
private static final long serialVersionUID = 3256440291954406962L;
private static final String URL = "http://www.compass-project.org/dtd/";
private transient ClassLoader resourceLoader;
/**
* Default constructor using DTDEntityResolver classloader for resource
* loading.
*/
public DTDEntityResolver() {
}
/**
* Set the class loader used to load resouces
*
* @param resourceLoader class loader to use
*/
public DTDEntityResolver(ClassLoader resourceLoader) {
this.resourceLoader = resourceLoader;
}
public InputSource resolveEntity(String publicId, String systemId) {
if (systemId != null && systemId.startsWith("http://compass.sourceforge.net")) {
throw new IllegalArgumentException("Using old format for DTD, please use the url [" + URL + "]");
}
if (systemId != null && systemId.startsWith("http://static.compassframework")) {
throw new IllegalArgumentException("Using old format for DTD, please use the url [" + URL + "]");
}
if (systemId != null && systemId.startsWith("http://www.opensymphony.com/compass/dtd/")) {
throw new IllegalArgumentException("Using old format for DTD, please use the url [" + URL + "]");
}
if (systemId != null && systemId.startsWith(URL)) {
// Search for DTD
String location = "/org/compass/core/" + systemId.substring(URL.length());
InputStream dtdStream = resourceLoader == null ?
getClass().getResourceAsStream(location) : resourceLoader.getResourceAsStream(location);
if (dtdStream == null) {
throw new ConfigurationException("DTD system id [" + systemId + "] not found at [" + location + "], " +
"please check it has the correct location. Have you included compass in your class path?");
} else {
InputSource source = new InputSource(dtdStream);
source.setPublicId(publicId);
source.setSystemId(systemId);
return source;
}
} else {
throw new ConfigurationException("DTD system id [" + systemId + "] not found, please check it has the " +
"correct location");
}
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
/** to allow serialization of configuration */
ois.defaultReadObject();
this.resourceLoader = this.getClass().getClassLoader();
}
}