io.gravitee.policy.xml2json.XmlToJsonTransformationPolicy Maven / Gradle / Ivy

Go to download
/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.policy.xml2json;

import io.gravitee.common.http.MediaType;
import io.gravitee.gateway.api.Response;
import io.gravitee.gateway.api.buffer.Buffer;
import io.gravitee.gateway.api.http.stream.TransformableStreamBuilder;
import io.gravitee.gateway.api.stream.ReadWriteStream;
import io.gravitee.gateway.api.stream.exception.TransformationException;
import io.gravitee.policy.api.annotations.OnResponseContent;
import io.gravitee.policy.xml2json.transformer.JSONException;
import io.gravitee.policy.xml2json.transformer.XML;

/**
 * @author David BRASSELY (david at gravitee.io)
 * @author GraviteeSource Team
 */
public class XmlToJsonTransformationPolicy {

    @OnResponseContent
    public ReadWriteStream onResponseContent(Response response) {
        return TransformableStreamBuilder
                .on(response)
                .contentType(MediaType.APPLICATION_JSON)
                .transform(input -> {
                    try {
                        return Buffer.buffer(XML.toJSONObject(input.toString()).toString());
                    } catch (JSONException ex) {
                        throw new TransformationException("Unable to transform into JSON: " + ex.getMessage(), ex);
                    }
                })
                .build();
    }
}