org.elasticsearch.hadoop.serialization.json.JsonFactory Maven / Gradle / Ivy
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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.hadoop.serialization.json;
import java.io.IOException;
import java.util.Iterator;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.map.ObjectMapper;
import org.elasticsearch.hadoop.util.ObjectUtils;
public abstract class JsonFactory {
private static final boolean HAS_OBJECT_READER = ObjectUtils.isClassPresent(
"org.codehaus.jackson.map.ObjectReader", JsonFactory.class.getClassLoader());
public static ObjectReader objectReader(ObjectMapper mapper, Class clazz) {
return (HAS_OBJECT_READER ? JacksonObjectReader.reader(mapper, clazz) : BackportedObjectReader.create(mapper, clazz));
}
private static class JacksonObjectReader {
public static ObjectReader reader(final ObjectMapper mapper, final Class clazz) {
return new ObjectReader() {
private final org.codehaus.jackson.map.ObjectReader or = mapper.reader(clazz);
@Override
public Iterator readValues(JsonParser parser) throws IOException {
return or.readValues(parser);
}
};
}
}
}