com.google.api.ads.common.lib.soap.jaxb.JaxBDeserializer Maven / Gradle / Ivy

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Client library for Java for accessing ads APIs including DFP. If you want to use this library, you must also include another Maven artifact to specify which framework you would like to use it with. For example, to use DFP with Axis, you should include the "dfp-axis" artifact.

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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 com.google.api.ads.common.lib.soap.jaxb;

import org.apache.commons.lang.SerializationException;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.Source;

/**
 * Deserializes XML to an instance of a JAX-WS generated class.
 *
 * @param  Class we are deserializing.
 */
public class JaxBDeserializer {

  private final Class clazz;
  private final JAXBContext jaxbContext;

  /**
   * Constructs a JAX-WS deserializer for the specified class.
   *
   * @param clazz Class to deserialize.
   * @throws SerializationException if unable to construct the deserializer.
   */
  public JaxBDeserializer(Class clazz) {
    this.clazz = clazz;
    try {
      this.jaxbContext = JAXBContext.newInstance(clazz);
    } catch (JAXBException e) {
      throw new SerializationException(
          String.format("Could not construct deserializer for class: %s.", clazz), e);
    }
  }

  /**
   * Deserializes the object.
   *
   * @throws SerializationException if we cannot deserialize the object.
   */
  public T deserialize(Source source) {
    try {
      Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
      JAXBElement jaxbElement = unmarshaller.unmarshal(source, clazz);
      return jaxbElement.getValue();
    } catch (JAXBException e) {
      throw new SerializationException(
          String.format("Could not deserialize %s object from source %s.", clazz, source), e);
    }
  }
}