/**
* 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.avro.ipc.specific;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.avro.Schema;
import org.apache.avro.Protocol;
import org.apache.avro.Protocol.Message;
import org.apache.avro.AvroRuntimeException;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.io.Encoder;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.specific.SpecificData;
import org.apache.avro.specific.SpecificDatumReader;
import org.apache.avro.specific.SpecificDatumWriter;
import org.apache.avro.ipc.generic.GenericResponder;
/** {@link org.apache.avro.ipc.Responder Responder} for generated interfaces.*/
public class SpecificResponder extends GenericResponder {
private Object impl;
public SpecificResponder(Class iface, Object impl) {
this(iface, impl, new SpecificData(impl.getClass().getClassLoader()));
}
public SpecificResponder(Protocol protocol, Object impl) {
this(protocol, impl, new SpecificData(impl.getClass().getClassLoader()));
}
public SpecificResponder(Class iface, Object impl, SpecificData data) {
this(data.getProtocol(iface), impl, data);
}
public SpecificResponder(Protocol protocol, Object impl, SpecificData data) {
super(protocol, data);
this.impl = impl;
}
public SpecificData getSpecificData() {return (SpecificData)getGenericData();}
@Override
protected DatumWriter<Object> getDatumWriter(Schema schema) {
return new SpecificDatumWriter<Object>(schema, getSpecificData());
}
@Override
protected DatumReader<Object> getDatumReader(Schema actual, Schema expected) {
return new SpecificDatumReader<Object>(actual, expected, getSpecificData());
}
@Override
public void writeError(Schema schema, Object error,
Encoder out) throws IOException {
getDatumWriter(schema).write(error, out);
}
@Override
public Object respond(Message message, Object request) throws Exception {
int numParams = message.getRequest().getFields().size();
Object[] params = new Object[numParams];
Class[] paramTypes = new Class[numParams];
int i = 0;
try {
for (Schema.Field param: message.getRequest().getFields()) {
params[i] = ((GenericRecord)request).get(param.name());
paramTypes[i] = getSpecificData().getClass(param.schema());
i++;
}
Method method = impl.getClass().getMethod(message.getName(), paramTypes);
method.setAccessible(true);
return method.invoke(impl, params);
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof Exception) {
throw (Exception) e.getTargetException();
} else {
throw new Exception(e.getTargetException());
}
} catch (NoSuchMethodException e) {
throw new AvroRuntimeException(e);
} catch (IllegalAccessException e) {
throw new AvroRuntimeException(e);
}
}
}