org.atemsource.atem.impl.json.attribute.DoubleAttribute.java Source code

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Here is the source code for org.atemsource.atem.impl.json.attribute.DoubleAttribute.java

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/*******************************************************************************
 * Stefan Meyer, 2012 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.atemsource.atem.impl.json.attribute;

import org.atemsource.atem.api.infrastructure.exception.ConversionException;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.node.ObjectNode;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope("prototype")
public class DoubleAttribute extends JsonAttribute<Double> {

    @Override
    public Double getValue(Object entity) {
        ObjectNode node = (ObjectNode) entity;
        if (node.isNull()) {
            throw new NullPointerException("entity is null");
        } else {
            JsonNode jsonNode = node.get(getCode());
            if (jsonNode == null || jsonNode.isNull()) {
                return null;
            } else {
                if (!jsonNode.isNumber()) {
                    throw new ConversionException(jsonNode.getValueAsText(), getTargetType());
                }
                return jsonNode.getDoubleValue();
            }
        }
    }

    @Override
    public boolean isWriteable() {
        return true;
    }

    @Override
    public void setValue(Object entity, Double value) {
        ObjectNode node = (ObjectNode) entity;
        if (node.isNull()) {
            throw new NullPointerException("entity is null");
        } else if (value == null) {
            node.putNull(getCode());
        } else {
            node.put(getCode(), value);
        }
    }

}