annis.provider.PlainTextMatchGroupProvider.java Source code

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Here is the source code for annis.provider.PlainTextMatchGroupProvider.java

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/*
 * Copyright 2012 SFB 632.
 *
 * 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 annis.provider;

import annis.service.objects.MatchGroup;
import com.google.common.base.Charsets;
import com.google.common.io.CharStreams;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
@Provider
public class PlainTextMatchGroupProvider implements MessageBodyWriter<MatchGroup>, MessageBodyReader<MatchGroup> {

    private static final org.slf4j.Logger log = LoggerFactory.getLogger(PlainTextMatchGroupProvider.class);

    @Override
    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return (MediaType.TEXT_PLAIN_TYPE.isCompatible(mediaType) && MatchGroup.class.isAssignableFrom(type));
    }

    @Override
    public long getSize(MatchGroup t, Class<?> type, Type genericType, Annotation[] annotations,
            MediaType mediaType) {
        return -1;
    }

    @Override
    public void writeTo(MatchGroup match, Class<?> type, Type genericType, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
            throws IOException, WebApplicationException {

        try (OutputStreamWriter writer = new OutputStreamWriter(entityStream, Charsets.UTF_8)) {
            writer.append(match.toString());
        }
    }

    @Override
    public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return (MediaType.TEXT_PLAIN_TYPE.isCompatible(mediaType) && MatchGroup.class.isAssignableFrom(type));
    }

    @Override
    public MatchGroup readFrom(Class<MatchGroup> type, Type genericType, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
            throws IOException, WebApplicationException {

        String val = CharStreams.toString(new InputStreamReader(entityStream, Charsets.UTF_8));
        MatchGroup result = MatchGroup.parseString(val);
        return result;

    }

}