/*
* Copyright 2010 Alibaba Group Holding Limited.
* All rights reserved.
*
* 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 com.alibaba.citrus.springext.support.resolver;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import com.alibaba.citrus.springext.Schema;
import com.alibaba.citrus.springext.Schemas;
import com.alibaba.citrus.springext.support.SchemaSet;
public class SchemaEntityResolver implements EntityResolver {
private final static Logger log = LoggerFactory.getLogger(SchemaEntityResolver.class);
private final EntityResolver defaultEntityResolver;
private final SchemaSet schemas;
public SchemaEntityResolver(EntityResolver defaultEntityResolver, Schemas... schemasList) {
this.defaultEntityResolver = defaultEntityResolver;
this.schemas = new SchemaSet(schemasList);
}
public EntityResolver getDefaultEntityResolver() {
return defaultEntityResolver;
}
public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
log.trace("Trying to locate XML entity {} as configuration points schema.", systemId);
Schema schema = schemas.findSchema(systemId);
if (schema == null) {
if (defaultEntityResolver != null) {
return defaultEntityResolver.resolveEntity(publicId, systemId);
} else {
return null;
}
}
log.debug("Found XML schema for systemId {}: {}", systemId, schema);
return new InputSource(schema.getInputStream());
}
}