com.nesscomputing.migratory.loader.UTF8StringContentConverter.java Source code

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Here is the source code for com.nesscomputing.migratory.loader.UTF8StringContentConverter.java

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/**
 * Copyright (C) 2012 Ness Computing, Inc.
 *
 * 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 com.nesscomputing.migratory.loader;

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

import javax.annotation.concurrent.Immutable;

import com.google.common.base.Charsets;
import com.google.common.io.CharStreams;
import com.google.common.io.Closeables;

import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;

import com.nesscomputing.tinyhttp.HttpContentConverter;

/**
 * Load an UTF-8 string from HTTP.
 */
@Immutable
public class UTF8StringContentConverter implements HttpContentConverter<String> {
    public static final HttpContentConverter<String> DEFAULT_CONVERTER = new UTF8StringContentConverter();

    public UTF8StringContentConverter() {
    }

    @Override
    public String convert(HttpRequest httpClientRequest, HttpResponse httpClientResponse, InputStream inputStream)
            throws IOException {
        final int responseCode = httpClientResponse.getStatusLine().getStatusCode();
        switch (responseCode) {
        case 200:
        case 201:
            final InputStreamReader reader = new InputStreamReader(inputStream, Charsets.UTF_8);

            try {
                return CharStreams.toString(reader);
            } finally {
                Closeables.closeQuietly(reader);
            }

        case 204:
            return "";

        default:
            throw new IOException("Could not load file from " + httpClientRequest.getRequestLine().getUri() + " ("
                    + httpClientResponse.getStatusLine().getStatusCode() + ")");
        }
    }

}