/* 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 org.camunda.bpm.engine.impl.variable;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamClass;
import java.io.Serializable;
import java.util.Map;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.delegate.ProcessEngineVariableType;
import org.camunda.bpm.engine.delegate.SerializedVariableValue;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.core.variable.SerializedVariableValueImpl;
import org.camunda.bpm.engine.impl.persistence.entity.VariableInstanceEntity;
import org.camunda.bpm.engine.impl.util.IoUtil;
import org.camunda.bpm.engine.impl.util.ReflectUtil;
/**
* @author Tom Baeyens
*/
public class SerializableType extends ByteArrayType {
public String getTypeName() {
return ProcessEngineVariableType.SERIALIZABLE.getName();
}
public Object getValue(ValueFields valueFields) {
Object cachedObject = valueFields.getCachedValue();
if (cachedObject!=null) {
return cachedObject;
}
byte[] bytes = (byte[]) super.getValue(valueFields);
if(bytes != null) {
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
Object deserializedObject;
try {
ObjectInputStream ois = new ClassloaderAwareObjectInputStream(bais);
deserializedObject = ois.readObject();
valueFields.setCachedValue(deserializedObject);
if (valueFields instanceof VariableInstanceEntity) {
if (Context.getCommandContext() == null) {
throw new ProcessEngineException("Unable to deserizable variable instance outside of a command context");
}
Context
.getCommandContext()
.getSession(DeserializedObjectsSession.class)
.addDeserializedObject(deserializedObject, bytes, (VariableInstanceEntity) valueFields);
}
} catch (Exception e) {
throw new ProcessEngineException("Couldn't deserialize object in variable '"+valueFields.getName()+"'", e);
} finally {
IoUtil.closeSilently(bais);
}
return deserializedObject;
} else {
return null;
}
}
public void setValue(Object value, ValueFields valueFields) {
byte[] byteArray = serialize(value, valueFields);
valueFields.setCachedValue(value);
if(valueFields.getByteArrayValue() == null) {
if(valueFields instanceof VariableInstanceEntity) {
Context
.getCommandContext()
.getSession(DeserializedObjectsSession.class)
.addDeserializedObject(valueFields.getCachedValue(), byteArray, (VariableInstanceEntity)valueFields);
}
}
super.setValue(byteArray, valueFields);
}
public static byte[] serialize(Object value, ValueFields valueFields) {
if(value == null) {
return null;
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream ois = null;
try {
ois = new ObjectOutputStream(baos);
ois.writeObject(value);
} catch (Exception e) {
throw new ProcessEngineException("Couldn't serialize value '"+value+"' in variable '"+valueFields.getName()+"'", e);
} finally {
IoUtil.closeSilently(ois);
}
return baos.toByteArray();
}
public boolean isAbleToStore(Object value) {
return value instanceof Serializable;
}
public String getTypeNameForValue(ValueFields valueFields) {
return Serializable.class.getSimpleName();
}
public SerializedVariableValue getSerializedValue(ValueFields valueFields) {
SerializedVariableValueImpl result = new SerializedVariableValueImpl();
result.setValue(super.getValue(valueFields));
return result;
}
public void setValueFromSerialized(Object serializedValue, Map<String, Object> configuration, ValueFields valueFields) {
super.setValue(serializedValue, valueFields);
}
public boolean isAbleToStoreSerializedValue(Object value, Map<String, Object> configuration) {
return super.isAbleToStoreSerializedValue(value, configuration);
}
public boolean storesCustomObjects() {
return true;
}
protected static class ClassloaderAwareObjectInputStream extends ObjectInputStream {
public ClassloaderAwareObjectInputStream(InputStream in) throws IOException {
super(in);
}
protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
return ReflectUtil.loadClass(desc.getName());
}
}
}