org.elasticsearch.action.support.ToXContentToBytes 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.action.support;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.client.Requests;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentType;
/**
* Base class for {@link ToXContent} implementation that also support conversion to {@link BytesReference} for serialization purposes
*/
public abstract class ToXContentToBytes implements ToXContent {
private final XContentType defaultType;
protected ToXContentToBytes() {
this.defaultType = Requests.CONTENT_TYPE;
}
protected ToXContentToBytes(XContentType defaultType) {
this.defaultType = defaultType;
}
/**
* Returns a {@link org.elasticsearch.common.bytes.BytesReference}
* containing the {@link ToXContent} output in binary format.
* Builds the request based on the default {@link XContentType}, either {@link Requests#CONTENT_TYPE} or provided as a constructor argument
*/
public final BytesReference buildAsBytes() {
return buildAsBytes(defaultType);
}
/**
* Returns a {@link org.elasticsearch.common.bytes.BytesReference}
* containing the {@link ToXContent} output in binary format.
* Builds the request as the provided contentType
*/
public final BytesReference buildAsBytes(XContentType contentType) {
try {
XContentBuilder builder = XContentFactory.contentBuilder(contentType);
toXContent(builder, ToXContent.EMPTY_PARAMS);
return builder.bytes();
} catch (Exception e) {
throw new ElasticsearchException("Failed to build ToXContent", e);
}
}
@Override
public final String toString() {
try {
XContentBuilder builder = XContentFactory.jsonBuilder();
builder.prettyPrint();
toXContent(builder, EMPTY_PARAMS);
return builder.string();
} catch (Exception e) {
// So we have a stack trace logged somewhere
return "{ \"error\" : \"" + ExceptionsHelper.detailedMessage(e) + "\"}";
}
}
}