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package org.glassfish.jersey.examples.clipboard;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.nio.charset.Charset;
import java.util.Collection;
import java.util.logging.Logger;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
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.glassfish.jersey.message.MessageUtils;
/**
*
* @author Jakub Podlesak (jakub.podlesak at oracle.com)
*/
public abstract class ClipboardDataProvider implements MessageBodyWriter, MessageBodyReader {
@Provider
@Consumes("text/plain")
@Produces("text/plain")
public static class TextPlain extends ClipboardDataProvider {
@Override
public void writeTo(final Object t, final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType, final MultivaluedMap httpHeaders, final OutputStream entityStream)
throws IOException, WebApplicationException {
entityStream.write(t.toString().getBytes(MessageUtils.getCharset(mediaType)));
}
@Override
public Object readFrom(final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType, final MultivaluedMap httpHeaders, final InputStream entityStream)
throws IOException, WebApplicationException {
return new ClipboardData(readStringFromStream(entityStream, MessageUtils.getCharset(mediaType)));
}
}
@Provider
@Consumes("application/json")
@Produces("application/json")
public static class ApplicationJson extends ClipboardDataProvider {
private static final String JsonOpenning = "{\"content\":\"";
private static final String JsonClosing = "\"}";
@Override
public void writeTo(final Object t, final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType, final MultivaluedMap httpHeaders, final OutputStream entityStream)
throws IOException, WebApplicationException {
entityStream.write(String.format("%s%s%s", JsonOpenning, t.toString(), JsonClosing)
.getBytes(MessageUtils.getCharset(mediaType)));
}
@Override
public Object readFrom(final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType, final MultivaluedMap httpHeaders, final InputStream entityStream)
throws IOException, WebApplicationException {
final String jsonExpression = readStringFromStream(entityStream, MessageUtils.getCharset(mediaType));
return new ClipboardData(jsonExpression.replace(JsonOpenning, "").replace(JsonClosing, ""));
}
}
@Override
public boolean isWriteable(final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType) {
return isKnownType(type, genericType);
}
private boolean isKnownType(final Class<?> type, final Type genericType) {
return type.isAssignableFrom(ClipboardData.class)
|| (Collection.class.isAssignableFrom(type)
&& (((ParameterizedType) genericType).getActualTypeArguments()[0]).equals(String.class));
}
@Override
public long getSize(final Object t, final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType) {
return -1;
}
@Override
public boolean isReadable(final Class type, final Type genericType, final Annotation[] annotations,
final MediaType mediaType) {
return isKnownType(type, genericType);
}
private static String readStringFromStream(final InputStream entityStream, Charset charset) throws IOException {
final StringBuilder result = new StringBuilder();
final byte[] buf = new byte[2048];
int i;
while ((i = entityStream.read(buf)) != -1) {
result.append(new String(buf, 0, i, charset));
}
return result.toString();
}
}