Android Open Source - demo-flickr-feed-android Flickr Converter

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Java Source Code

package uk.org.tomek.flickrfeed.rest;
// w w  w . j a va2 s.  c  o m
import com.google.gson.Gson;

import org.apache.http.protocol.HTTP;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.nio.charset.Charset;

import retrofit.converter.ConversionException;
import retrofit.converter.GsonConverter;
import retrofit.mime.TypedInput;
import uk.org.tomek.flickrfeed.utils.Logger;

/**
 * Custom GSON converter used to remove extra information from the input JSON feed.
 *
 * Created by tomek on 23/11/14.
 */
public class FlickrConverter extends GsonConverter {

    private final Logger mLogger = Logger.getLogger(FlickrConverter.class);

    public FlickrConverter(Gson gson) {
        super(gson);
    }

    public FlickrConverter(Gson gson, String charset) {
        super(gson, charset);
    }

    @Override
    public Object fromBody(TypedInput body, Type type) throws ConversionException {
        String string = RestUtils.typedInputToString(body);
        String replaced = string.replace("jsonFlickrFeed(", "");
        // remove last character (closing bracket)
        String substring = replaced.substring(0, replaced.length() - 1);
        body = new JsonTypedInput(substring.getBytes(Charset.forName(HTTP.UTF_8)));

        return super.fromBody(body, type);
    }

    /**
     *
     */
    private static class JsonTypedInput implements TypedInput {

        private final byte[] mReplaced;

        public JsonTypedInput(byte[] replaced) {
            mReplaced = replaced;
        }

        @Override
        public String mimeType() {
            return "application/json; charset=UTF-8";
        }

        @Override
        public long length() {
            return mReplaced.length;
        }

        @Override
        public InputStream in() throws IOException {
            return new ByteArrayInputStream(mReplaced);
        }
    }

}

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