com.hortonworks.amstore.view.proxy.ResponseTranslator.java Source code

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Here is the source code for com.hortonworks.amstore.view.proxy.ResponseTranslator.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 com.hortonworks.amstore.view.proxy;

import com.hortonworks.amstore.view.utils.ServiceFormattedException;
import org.apache.commons.io.IOUtils;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;

/**
 * Response translator encapsulates InputStream
 * and able to convert it to different data types
 */
public class ResponseTranslator {
    private static final Logger LOG = LoggerFactory.getLogger(RequestBuilder.class);

    private InputStream inputStream;

    /**
     * Constructor for ResponseTranslator
     * @param inputStream InputStream instance
     */
    public ResponseTranslator(InputStream inputStream) {
        this.inputStream = inputStream;
    }

    /**
     * Get InputStream of response from server for manual processing
     * @return input stream of response
     */
    public InputStream asInputStream() {
        return inputStream;
    }

    /**
     * Retrieve response as String
     * @return response as String
     */
    public String asString() {
        String response;
        try {
            response = IOUtils.toString(inputStream);
        } catch (IOException e) {
            throw new ServiceFormattedException("Can't read from target host", e);
        }
        LOG.debug(String.format("Response: %s", response));

        return response;
    }

    /**
     * Retrieve response as JSON
     * @return response as JSON
     */
    public JSONObject asJSON() {
        String jsonString = asString();
        return (JSONObject) JSONValue.parse(jsonString);
    }

    /**
     * InputStream setter
     * @param inputStream InputStream instance
     */
    public void setInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
    }
}