org.elasticsearch.rest.action.support.RestXContentBuilder Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* distributed with 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.rest.action.support;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.compress.CompressedStreamInput;
import org.elasticsearch.common.compress.Compressor;
import org.elasticsearch.common.compress.CompressorFactory;
import org.elasticsearch.common.io.Streams;
import org.elasticsearch.common.io.stream.CachedStreamOutput;
import org.elasticsearch.common.xcontent.*;
import org.elasticsearch.rest.RestRequest;
import java.io.IOException;
/**
*
*/
public class RestXContentBuilder {
public static XContentBuilder restContentBuilder(RestRequest request) throws IOException {
// use the request body as the auto detect source (if it exists)
return restContentBuilder(request, request.hasContent() ? request.content() : null);
}
public static XContentBuilder restContentBuilder(RestRequest request, @Nullable BytesReference autoDetectSource) throws IOException {
XContentType contentType = XContentType.fromRestContentType(request.param("format", request.header("Content-Type")));
if (contentType == null) {
// try and guess it from the auto detect source
if (autoDetectSource != null) {
contentType = XContentFactory.xContentType(autoDetectSource);
}
}
if (contentType == null) {
// default to JSON
contentType = XContentType.JSON;
}
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
XContentBuilder builder = new XContentBuilder(XContentFactory.xContent(contentType), cachedEntry.bytes(), cachedEntry);
if (request.paramAsBoolean("pretty", false)) {
builder.prettyPrint();
}
String casing = request.param("case");
if (casing != null && "camelCase".equals(casing)) {
builder.fieldCaseConversion(XContentBuilder.FieldCaseConversion.CAMELCASE);
} else {
// we expect all REST interfaces to write results in underscore casing, so
// no need for double casing
builder.fieldCaseConversion(XContentBuilder.FieldCaseConversion.NONE);
}
return builder;
}
/**
* Directly writes the source to the output builder
*/
public static void directSource(BytesReference source, XContentBuilder rawBuilder, ToXContent.Params params) throws IOException {
Compressor compressor = CompressorFactory.compressor(source);
if (compressor != null) {
CompressedStreamInput compressedStreamInput = compressor.streamInput(source.streamInput());
XContentType contentType = XContentFactory.xContentType(compressedStreamInput);
compressedStreamInput.resetToBufferStart();
if (contentType == rawBuilder.contentType()) {
Streams.copy(compressedStreamInput, rawBuilder.stream());
} else {
XContentParser parser = XContentFactory.xContent(contentType).createParser(compressedStreamInput);
try {
parser.nextToken();
rawBuilder.copyCurrentStructure(parser);
} finally {
parser.close();
}
}
} else {
XContentType contentType = XContentFactory.xContentType(source);
if (contentType == rawBuilder.contentType()) {
source.writeTo(rawBuilder.stream());
} else {
XContentParser parser = XContentFactory.xContent(contentType).createParser(source);
try {
parser.nextToken();
rawBuilder.copyCurrentStructure(parser);
} finally {
parser.close();
}
}
}
}
public static void restDocumentSource(BytesReference source, XContentBuilder builder, ToXContent.Params params) throws IOException {
Compressor compressor = CompressorFactory.compressor(source);
if (compressor != null) {
CompressedStreamInput compressedStreamInput = compressor.streamInput(source.streamInput());
XContentType contentType = XContentFactory.xContentType(compressedStreamInput);
compressedStreamInput.resetToBufferStart();
if (contentType == builder.contentType()) {
builder.rawField("_source", compressedStreamInput);
} else {
XContentParser parser = XContentFactory.xContent(contentType).createParser(compressedStreamInput);
try {
parser.nextToken();
builder.field("_source");
builder.copyCurrentStructure(parser);
} finally {
parser.close();
}
}
} else {
XContentType contentType = XContentFactory.xContentType(source);
if (contentType == builder.contentType()) {
builder.rawField("_source", source);
} else {
XContentParser parser = XContentFactory.xContent(contentType).createParser(source);
try {
parser.nextToken();
builder.field("_source");
builder.copyCurrentStructure(parser);
} finally {
parser.close();
}
}
}
}
}