/**
* 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.cxf.jaxrs.provider;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.logging.Logger;
import javax.ws.rs.core.Context;
import javax.ws.rs.ext.ContextResolver;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import org.apache.cxf.aegis.AegisContext;
import org.apache.cxf.common.logging.LogUtils;
public abstract class AbstractAegisProvider
implements MessageBodyReader<Object>, MessageBodyWriter<Object> {
private static final Logger LOG = LogUtils.getL7dLogger(AbstractAegisProvider.class);
private static final String CLASSPATH_PREFIX = "classpath:";
private static Map<Class<?>, AegisContext> classContexts = new WeakHashMap<Class<?>, AegisContext>();
@Context protected ContextResolver<AegisContext> resolver;
private Schema schema;
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] anns) {
return isSupported(type, genericType, anns);
}
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations) {
return isSupported(type, genericType, annotations);
}
public void setSchemas(List<String> locations) {
schema = createSchema(locations);
}
public long getSize(Object o) {
return -1;
}
protected AegisContext getAegisContext(Class<?> type, Type genericType) {
if (resolver != null) {
AegisContext context = resolver.getContext(type);
// it's up to the resolver to keep its contexts in a map
if (context != null) {
return context;
}
}
return getClassContext(type);
}
private AegisContext getClassContext(Class<?> type) {
synchronized (classContexts) {
AegisContext context = classContexts.get(type);
if (context == null) {
context = new AegisContext();
Set<Class<?>> rootClasses = new HashSet<Class<?>>();
context.setRootClasses(rootClasses);
context.initialize();
classContexts.put(type, context);
}
return context;
}
}
/**
* For Aegis, it's not obvious to me how we'd decide that a type was hopeless.
* @param type
* @param genericType
* @param annotations
* @return
*/
protected boolean isSupported(Class<?> type, Type genericType, Annotation[] annotations) {
return true;
}
private Schema createSchema(List<String> locations) {
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema s = null;
try {
List<Source> sources = new ArrayList<Source>();
for (String loc : locations) {
InputStream is = null;
if (loc.startsWith(CLASSPATH_PREFIX)) {
String path = loc.substring(CLASSPATH_PREFIX.length() + 1);
is = getClass().getClassLoader().getResourceAsStream(path);
if (is == null) {
LOG.warning("No schema resource " + loc + " is available on classpath");
return null;
}
} else {
File f = new File(loc);
if (!f.exists()) {
LOG.warning("No schema resource " + loc + " is available on local disk");
return null;
}
is = new FileInputStream(f);
}
Reader r = new BufferedReader(
new InputStreamReader(is, "UTF-8"));
sources.add(new StreamSource(r));
}
s = factory.newSchema(sources.toArray(new Source[]{}));
} catch (Exception ex) {
LOG.warning("Validation will be disabled, failed to create schema : " + ex.getMessage());
}
return s;
}
protected Schema getSchema() {
return schema;
}
}