package org.jboss.resteasy.plugins.providers;

import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;

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.MessageBodyWriter;
import javax.ws.rs.ext.Provider;

import org.jboss.resteasy.resteasy_jaxrs.i18n.Messages;

Author:Ron Sigal
Version:$Revision: 1 $
/** * @author <a href="mailto:rsigal@redhat.com">Ron Sigal</a> * @version $Revision: 1 $ */
@Provider @Produces("text/plain") public class DefaultNumberWriter implements MessageBodyWriter<Number> { public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) { // StringTextStar should pick up strings return !String.class.equals(type) && !type.isArray(); } @Override public long getSize(Number n, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) { return convertToBytes(n, mediaType).length; } @Override public void writeTo(Number n, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException { byte[] bytes = convertToBytes(n, mediaType); entityStream.write(bytes); } private byte[] convertToBytes(Number n, MediaType mediaType) { String charset = mediaType.getParameters().get("charset"); if (charset == null) { charset = StandardCharsets.UTF_8.name(); } if (n instanceof Byte) { try { return Byte.toString(n.byteValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { // Use default encoding. return Byte.toString(n.byteValue()).getBytes(); } } if (n instanceof Double) { try { return Double.toString(n.doubleValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { return Double.toString(n.doubleValue()).getBytes(); } } if (n instanceof Float) { try { return Float.toString(n.floatValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { return Float.toString(n.floatValue()).getBytes(); } } if (n instanceof Integer) { try { return Integer.toString(n.intValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { return Integer.toString(n.intValue()).getBytes(); } } if (n instanceof Long) { try { return Long.toString(n.longValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { return Long.toString(n.longValue()).getBytes(); } } if (n instanceof Short) { try { return Short.toString(n.shortValue()).getBytes(charset); } catch (UnsupportedEncodingException e) { return Short.toString(n.shortValue()).getBytes(); } } if (n instanceof BigDecimal) { try { return BigDecimal.class.cast(n).toString().getBytes(charset); } catch (UnsupportedEncodingException e) { return BigDecimal.class.cast(n).toString().getBytes(); } } if (n instanceof BigInteger) { try { return BigInteger.class.cast(n).toString().getBytes(charset); } catch (UnsupportedEncodingException e) { return BigInteger.class.cast(n).toString().getBytes(); } } throw new RuntimeException(Messages.MESSAGES.unexpectedNumberSubclass(n.getClass().getName())); } }