org.dominokit.jacksonapt.deser.collection.IterableJsonDeserializer Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jackson-apt Show documentation
Apt based jackson
The newest version!
/*
 * Copyright 2013 Nicolas Morel
 *
 * 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.dominokit.jacksonapt.deser.collection;

import java.util.ArrayList;
import java.util.Collection;
import org.dominokit.jacksonapt.JsonDeserializationContext;
import org.dominokit.jacksonapt.JsonDeserializer;
import org.dominokit.jacksonapt.JsonDeserializerParameters;
import org.dominokit.jacksonapt.stream.JsonReader;
import org.dominokit.jacksonapt.stream.JsonToken;

/**
 * Default {@link org.dominokit.jacksonapt.JsonDeserializer} implementation for {@link
 * java.lang.Iterable}. The deserialization process returns an {@link java.util.ArrayList}.
 *
 * @param  Type of the elements inside the {@link java.lang.Iterable}
 */
public class IterableJsonDeserializer extends BaseIterableJsonDeserializer, T> {

  /**
   * newInstance
   *
   * @param deserializer {@link org.dominokit.jacksonapt.JsonDeserializer} used to deserialize the
   *     objects inside the {@link java.lang.Iterable}.
   * @param  Type of the elements inside the {@link java.lang.Iterable}
   * @return a new instance of {@link
   *     org.dominokit.jacksonapt.deser.collection.IterableJsonDeserializer}
   */
  public static  IterableJsonDeserializer newInstance(JsonDeserializer deserializer) {
    return new IterableJsonDeserializer(deserializer);
  }

  /**
   * @param deserializer {@link JsonDeserializer} used to deserialize the objects inside the {@link
   *     Iterable}.
   */
  private IterableJsonDeserializer(JsonDeserializer deserializer) {
    super(deserializer);
  }

  /** {@inheritDoc} */
  @Override
  public Iterable doDeserialize(
      JsonReader reader, JsonDeserializationContext ctx, JsonDeserializerParameters params) {
    if (JsonToken.BEGIN_ARRAY == reader.peek()) {

      Collection result = new ArrayList();

      reader.beginArray();
      while (JsonToken.END_ARRAY != reader.peek()) {
        result.add(deserializer.deserialize(reader, ctx, params));
      }
      reader.endArray();
      return result;

    } else if (ctx.isAcceptSingleValueAsArray()) {

      Collection result = new ArrayList();
      result.add(deserializer.deserialize(reader, ctx, params));
      return result;

    } else {
      throw ctx.traceError(
          "Cannot deserialize a java.lang.Iterable out of " + reader.peek() + " token", reader);
    }
  }
}