org.springframework.batch.core.repository.dao.DefaultExecutionContextSerializer Maven / Gradle / Ivy
/*
* Copyright 2012-2017 the original author or authors.
*
* 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
*
* https://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.springframework.batch.core.repository.dao;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.util.Map;
import org.springframework.batch.core.repository.ExecutionContextSerializer;
import org.springframework.core.serializer.DefaultDeserializer;
import org.springframework.core.serializer.DefaultSerializer;
import org.springframework.core.serializer.Deserializer;
import org.springframework.core.serializer.Serializer;
import org.springframework.util.Assert;
/**
* An implementation of the {@link ExecutionContextSerializer} using the default
* serialization implementations from Spring ({@link DefaultSerializer} and
* {@link DefaultDeserializer}).
*
* @author Michael Minella
* @since 2.2
*/
@SuppressWarnings("rawtypes")
public class DefaultExecutionContextSerializer implements ExecutionContextSerializer {
private Serializer serializer = new DefaultSerializer();
private Deserializer deserializer = new DefaultDeserializer();
/**
* Serializes an execution context to the provided {@link OutputStream}. The
* stream is not closed prior to it's return.
*
* @param context {@link Map} contents of the {@code ExecutionContext}.
* @param out {@link OutputStream} where the serialized context information
* will be written.
*/
@Override
@SuppressWarnings("unchecked")
public void serialize(Map context, OutputStream out) throws IOException {
Assert.notNull(context, "context is required");
Assert.notNull(out, "OutputStream is required");
for(Object value : context.values()) {
Assert.notNull(value, "A null value was found");
if (!(value instanceof Serializable)) {
throw new IllegalArgumentException(
"Value: [" + value + "] must be serializable. "
+ "Object of class: [" + value.getClass().getName()
+ "] must be an instance of " + Serializable.class);
}
}
serializer.serialize(context, out);
}
/**
* Deserializes an execution context from the provided {@link InputStream}.
*
* @param inputStream {@link InputStream} containing the information to be deserialized.
* @return the object serialized in the provided {@link InputStream}
*/
@SuppressWarnings("unchecked")
@Override
public Map deserialize(InputStream inputStream) throws IOException {
return (Map) deserializer.deserialize(inputStream);
}
}