/**
* 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.json;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Providers;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.jaxrs.provider.AbstractConfigurableProvider;
import org.apache.cxf.jaxrs.provider.PrimitiveTextProvider;
import org.apache.cxf.jaxrs.provider.ProviderFactory;
import org.apache.cxf.jaxrs.utils.InjectionUtils;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
@Produces("application/json")
@Consumes("application/json")
public class SimpleTypeJsonProvider<T> extends AbstractConfigurableProvider
implements MessageBodyWriter<T>, MessageBodyReader<T> {
@Context
private Providers providers;
private boolean supportSimpleTypesOnly;
private PrimitiveTextProvider<T> primitiveHelper = new PrimitiveTextProvider<T>();
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return !supportSimpleTypesOnly || primitiveHelper.isReadable(type, genericType, annotations, mediaType);
}
@Override
public long getSize(T t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return -1;
}
@Override
public void writeTo(T t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, Object> headers, OutputStream os)
throws IOException, WebApplicationException {
if (!supportSimpleTypesOnly && !InjectionUtils.isPrimitive(type)) {
@SuppressWarnings("unchecked")
MessageBodyWriter<T> next =
(MessageBodyWriter<T>)providers.getMessageBodyWriter(type, genericType, annotations, mediaType);
JAXRSUtils.getCurrentMessage().put(ProviderFactory.ACTIVE_JAXRS_PROVIDER_KEY, this);
try {
next.writeTo(t, type, genericType, annotations, mediaType, headers, os);
} finally {
JAXRSUtils.getCurrentMessage().put(ProviderFactory.ACTIVE_JAXRS_PROVIDER_KEY, null);
}
} else {
os.write(StringUtils.toBytesASCII("{\"" + type.getSimpleName().toLowerCase() + "\":"));
writeQuote(os, type);
primitiveHelper.writeTo(t, type, genericType, annotations, mediaType, headers, os);
writeQuote(os, type);
os.write(StringUtils.toBytesASCII("}"));
}
}
private void writeQuote(OutputStream os, Class<?> type) throws IOException {
if (type == String.class) {
os.write(StringUtils.toBytesASCII("\""));
}
}
public void setSupportSimpleTypesOnly(boolean supportSimpleTypesOnly) {
this.supportSimpleTypesOnly = supportSimpleTypesOnly;
}
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return isWriteable(type, genericType, annotations, mediaType);
}
@Override
public T readFrom(Class<T> type, Type genericType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> headers, InputStream is)
throws IOException, WebApplicationException {
if (!supportSimpleTypesOnly && !InjectionUtils.isPrimitive(type)) {
MessageBodyReader<T> next =
(MessageBodyReader<T>)providers.getMessageBodyReader(type, genericType, annotations, mediaType);
JAXRSUtils.getCurrentMessage().put(ProviderFactory.ACTIVE_JAXRS_PROVIDER_KEY, this);
try {
return next.readFrom(type, genericType, annotations, mediaType, headers, is);
} finally {
JAXRSUtils.getCurrentMessage().put(ProviderFactory.ACTIVE_JAXRS_PROVIDER_KEY, null);
}
} else {
String data = IOUtils.toString(is).trim();
int index = data.indexOf(':');
data = data.substring(index + 1, data.length() - 1).trim();
if (data.startsWith("\"")) {
data = data.substring(1, data.length() - 1);
}
return primitiveHelper.readFrom(type, genericType, annotations, mediaType, headers,
new ByteArrayInputStream(StringUtils.toBytesUTF8(data)));
}
}
}