org.robertburrelldonkin.template4couchdb.rest.DefaultResponseHandler.java Source code

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Here is the source code for org.robertburrelldonkin.template4couchdb.rest.DefaultResponseHandler.java

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/*
*    Copyright 2012 Robert Burrell Donkin robertburrelldonkin.name
* 
*   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 org.robertburrelldonkin.template4couchdb.rest;

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

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.util.EntityUtils;
import org.robertburrelldonkin.template4couchdb.IDocumentUnmarshaller;

public class DefaultResponseHandler<T> implements ResponseHandler<T> {

    private final IDocumentUnmarshaller<T> mapper;

    public DefaultResponseHandler(final IDocumentUnmarshaller<T> mapper) {
        super();
        this.mapper = mapper;
    }

    @Override
    public T handleResponse(final HttpResponse response) throws ClientProtocolException, IOException {
        final HttpEntity entity = response.getEntity();
        final InputStream content = entity.getContent();
        final T result;
        try {
            final StatusLine status = response.getStatusLine();
            if (isSupported(status.getStatusCode())) {
                result = mapper.from(content);
            } else {
                EntityUtils.consume(entity);
                throw new UnsupportedHttpResponseStatusException(status);
            }
        } finally {
            IOUtils.closeQuietly(content);
        }
        return result;
    }

    private boolean isSupported(final int statusCode) {
        final boolean result;
        switch (statusCode) {
        case HttpStatus.SC_OK:
        case HttpStatus.SC_CREATED:
            result = true;
            break;
        default:
            result = false;
            break;
        }
        return result;
    }

    public IDocumentUnmarshaller<T> getUnmarshaller() {
        return mapper;
    }

}