org.camunda.bpm.engine.impl.variable.serializer.NullValueSerializer Maven / Gradle / Ivy
/*
* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. Camunda licenses this file to you under the Apache License,
* Version 2.0; 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.serializer;
import org.camunda.bpm.engine.variable.impl.value.NullValueImpl;
import org.camunda.bpm.engine.variable.impl.value.UntypedValueImpl;
import org.camunda.bpm.engine.variable.type.ValueType;
import org.camunda.bpm.engine.variable.value.TypedValue;
/**
* Used to serialize untyped null values.
*
* @author Daniel Meyer
* @author Tom Baeyens
*/
public class NullValueSerializer extends AbstractTypedValueSerializer {
public NullValueSerializer() {
super(ValueType.NULL);
}
public String getName() {
return ValueType.NULL.getName().toLowerCase();
}
public NullValueImpl convertToTypedValue(UntypedValueImpl untypedValue) {
return !untypedValue.isTransient() ? NullValueImpl.INSTANCE : NullValueImpl.INSTANCE_TRANSIENT;
}
public void writeValue(NullValueImpl value, ValueFields valueFields) {
// nothing to do
}
public NullValueImpl readValue(ValueFields valueFields, boolean deserialize, boolean asTransientValue) {
return NullValueImpl.INSTANCE;
}
protected boolean canWriteValue(TypedValue value) {
return value.getValue() == null;
}
}