at.orz.arangodb.http.JsonSequenceEntity.java Source code

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Here is the source code for at.orz.arangodb.http.JsonSequenceEntity.java

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/*
 * Copyright (C) 2012,2013 tamtam180
 *
 * 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 at.orz.arangodb.http;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.util.Iterator;

import org.apache.http.entity.AbstractHttpEntity;

import com.google.gson.Gson;

/**
 * @author tamtam180 - kirscheless at gmail.com
 *
 */
public class JsonSequenceEntity extends AbstractHttpEntity {

    private Iterator<?> it;
    private Gson gson;

    public JsonSequenceEntity(Iterator<?> it, Gson gson) {
        this.it = it;
        this.gson = gson;
        setChunked(true);
        setContentType("binary/octet-stream");
    }

    public boolean isRepeatable() {
        return false;
    }

    public long getContentLength() {
        return -1;
    }

    public InputStream getContent() throws IOException, IllegalStateException {
        throw new IllegalStateException("cannot support this method.");
    }

    public boolean isStreaming() {
        return true;
    }

    public void writeTo(OutputStream outstream) throws IOException {

        if (outstream == null) {
            throw new IllegalArgumentException("Output stream may not be null");
        }

        BufferedWriter writer = null;
        try {
            writer = new BufferedWriter(new OutputStreamWriter(outstream, "UTF-8"));
            while (it.hasNext()) {
                Object value = it.next();
                gson.toJson(value, writer);
                writer.newLine();
            }
            writer.flush();
        } finally {
        }

    }

}