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package com.sun.jersey.core.impl.provider.entity;

import com.sun.jersey.core.provider.AbstractMessageReaderWriterProvider;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;

/**
 *
 * @author Paul.Sandoz@Sun.Com
 */
@Produces({"application/octet-stream", "*/*"})
@Consumes({"application/octet-stream", "*/*"})
public final class InputStreamProvider extends AbstractMessageReaderWriterProvider<InputStream> {
    
    public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return InputStream.class == type;
    }
    
    public InputStream readFrom(
            Class<InputStream> type, 
            Type genericType, 
            Annotation annotations[],
            MediaType mediaType, 
            MultivaluedMap<String, String> httpHeaders, 
            InputStream entityStream) throws IOException {
        return entityStream;
    }

    public boolean isWriteable(Class<?> type, Type genericType, Annotation annotations[], MediaType mediaType) {
        return InputStream.class.isAssignableFrom(type);        
    }
    
    @Override
    public long getSize(InputStream t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        if (t instanceof ByteArrayInputStream)
            return ((ByteArrayInputStream)t).available();
        else 
            return -1;
    }
    
    public void writeTo(
            InputStream t, 
            Class<?> type, 
            Type genericType, 
            Annotation annotations[], 
            MediaType mediaType, 
            MultivaluedMap<String, Object> httpHeaders,
            OutputStream entityStream) throws IOException {
        try {
            writeTo(t, entityStream);
        } finally {
            t.close();
        }
    }
}