/*
* 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.
*
*/
package org.apache.tools.ant.types.resolver;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.XMLCatalog;
import org.apache.tools.ant.types.ResourceLocation;
import org.apache.xml.resolver.Catalog;
import org.apache.xml.resolver.CatalogManager;
import org.apache.xml.resolver.tools.CatalogResolver;
/**
* <p>This class extends the CatalogResolver class provided by Norman
* Walsh's resolver library in xml-commons. It provides the bridge
* between the Ant XMLCatalog datatype and the xml-commons Catalog
* class. XMLCatalog calls methods in this class using Reflection in
* order to avoid requiring the xml-commons resolver library in the
* path.</p>
*
* <p>The {@link org.apache.tools.ant.types.resolver.ApacheCatalog
* ApacheCatalog} class is used to parse external catalog files, which
* can be in either <a
* href="http://oasis-open.org/committees/entity/background/9401.html">
* plain text format</a> or <a
* href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">
* XML format</a>.</p>
*
* <p>For each entry found in an external catalog file, if any, an
* instance of {@link org.apache.tools.ant.types.ResourceLocation
* ResourceLocation} is created and added to the controlling
* XMLCatalog datatype. In this way, these entries will be included
* in XMLCatalog's lookup algorithm. See XMLCatalog.java for more
* details.</p>
*
* @see org.apache.tools.ant.types.XMLCatalog.CatalogResolver
* @see org.apache.xml.resolver.CatalogManager
* @since Ant 1.6
*/
public class ApacheCatalogResolver extends CatalogResolver {
/** The XMLCatalog object to callback. */
private XMLCatalog xmlCatalog = null;
static {
//
// If you don't do this, you get all sorts of annoying
// warnings about a missing properties file. However, it
// seems to work just fine with default values. Ultimately,
// we should probably include a "CatalogManager.properties"
// file in the ant jarfile with some default property
// settings. See CatalogManager.java for more details.
//
CatalogManager.getStaticManager().setIgnoreMissingProperties(true);
//
// Make sure CatalogResolver instantiates ApacheCatalog,
// rather than a plain Catalog
//
System.getProperties().put("xml.catalog.className",
ApacheCatalog.class.getName());
CatalogManager.getStaticManager().setUseStaticCatalog(false);
// debug
// CatalogManager.getStaticManager().setVerbosity(4);
}
/**
* Set the XMLCatalog object to callback.
* @param xmlCatalog the XMLCatalog to use.
*/
public void setXMLCatalog(XMLCatalog xmlCatalog) {
this.xmlCatalog = xmlCatalog;
}
/**
* XMLCatalog calls this to add an external catalog file for each
* file within a <code><catalogfiles></code> fileset.
* @param file the external catalog file.
*/
public void parseCatalog(String file) {
Catalog catalog = getCatalog();
if (!(catalog instanceof ApacheCatalog)) {
throw new BuildException("Wrong catalog type found: " + catalog.getClass().getName());
}
ApacheCatalog apacheCatalog = (ApacheCatalog) catalog;
// Pass in reference to ourselves so we can be called back.
apacheCatalog.setResolver(this);
try {
apacheCatalog.parseCatalog(file);
} catch (MalformedURLException ex) {
throw new BuildException(ex);
} catch (IOException ex) {
throw new BuildException(ex);
}
}
/**
* <p>Add a PUBLIC catalog entry to the controlling XMLCatalog instance.
* ApacheCatalog calls this for each PUBLIC entry found in an external
* catalog file.</p>
*
* @param publicid The public ID of the resource
* @param systemid The system ID (aka location) of the resource
* @param base The base URL of the resource. If the systemid
* specifies a relative URL/pathname, it is resolved using the
* base. The default base for an external catalog file is the
* directory in which the catalog is located.
*
*/
public void addPublicEntry(String publicid,
String systemid,
URL base) {
ResourceLocation dtd = new ResourceLocation();
dtd.setBase(base);
dtd.setPublicId(publicid);
dtd.setLocation(systemid);
xmlCatalog.addDTD(dtd);
}
/**
* <p>Add a URI catalog entry to the controlling XMLCatalog instance.
* ApacheCatalog calls this for each URI entry found in an external
* catalog file.</p>
*
* @param uri The URI of the resource
* @param altURI The URI to which the resource should be mapped
* (aka the location)
* @param base The base URL of the resource. If the altURI
* specifies a relative URL/pathname, it is resolved using the
* base. The default base for an external catalog file is the
* directory in which the catalog is located.
*
*/
public void addURIEntry(String uri,
String altURI,
URL base) {
ResourceLocation entity = new ResourceLocation();
entity.setBase(base);
entity.setPublicId(uri);
entity.setLocation(altURI);
xmlCatalog.addEntity(entity);
}
} //-- ApacheCatalogResolver
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