org.camunda.bpm.engine.impl.variable.serializer.StringValueSerializer Maven / Gradle / Ivy

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/*
 * 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.Variables;
import org.camunda.bpm.engine.variable.impl.value.UntypedValueImpl;
import org.camunda.bpm.engine.variable.type.ValueType;
import org.camunda.bpm.engine.variable.value.StringValue;

/**
 *
 * @author Tom Baeyens
 * @author Daniel Meyer
 */
public class StringValueSerializer extends PrimitiveValueSerializer {

  public static final String EMPTY_STRING = "!emptyString!";

  public StringValueSerializer() {
    super(ValueType.STRING);
  }

  public StringValue convertToTypedValue(UntypedValueImpl untypedValue) {
    return Variables.stringValue((String) untypedValue.getValue(), untypedValue.isTransient());
  }

  public StringValue readValue(ValueFields valueFields, boolean asTransientValue) {
    String textValue = valueFields.getTextValue();
    if (textValue == null && EMPTY_STRING.equals(valueFields.getTextValue2())) {
      textValue = "";
    }
    return Variables.stringValue(textValue, asTransientValue);
  }

  public void writeValue(StringValue variableValue, ValueFields valueFields) {
    String value = variableValue.getValue();
    valueFields.setTextValue(value);
    if ("".equals(value)) {
      valueFields.setTextValue2(EMPTY_STRING);
    }
  }

}