/*******************************************************************************
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.wink.common.internal.providers.entity;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

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.apache.wink.common.utils.ProviderUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Provider
@Consumes
@Produces
public class StringProvider implements MessageBodyReader<String>, MessageBodyWriter<String> {

    private static final Logger logger = LoggerFactory.getLogger(StringProvider.class);

    public boolean isReadable(Class<?> type,
                              Type genericType,
                              Annotation[] annotations,
                              MediaType mediaType) {
        return type.isAssignableFrom(String.class);
    }

    public String readFrom(Class<String> type,
                           Type genericType,
                           Annotation[] annotations,
                           MediaType mediaType,
                           MultivaluedMap<String, String> httpHeaders,
                           InputStream entityStream) throws IOException, WebApplicationException {
        byte[] bytes = ProviderUtils.readFromStreamAsBytes(entityStream);
        return new String(bytes, ProviderUtils.getCharset(mediaType));
    }

    public long getSize(String t,
                        Class<?> type,
                        Type genericType,
                        Annotation[] annotations,
                        MediaType mediaType) {
        String charSet = ProviderUtils.getCharset(mediaType);
        if (charSet != null && !"UTF-8".equals(charSet)) { //$NON-NLS-1$
            try {
                return t.getBytes(charSet).length;
            } catch (UnsupportedEncodingException e) {
                logger.debug("Unsupported character encoding exception: {}", e); //$NON-NLS-1$
                throw new WebApplicationException(e, 500);
            }
        }
        return t.length();
    }

    public boolean isWriteable(Class<?> type,
                               Type genericType,
                               Annotation[] annotations,
                               MediaType mediaType) {
        return type == String.class;
    }

    public void writeTo(String t,
                        Class<?> type,
                        Type genericType,
                        Annotation[] annotations,
                        MediaType mediaType,
                        MultivaluedMap<String, Object> httpHeaders,
                        OutputStream entityStream) throws IOException, WebApplicationException {
        
        ProviderUtils.setDefaultCharsetOnMediaTypeHeader(httpHeaders, mediaType);

        logger.debug("Writing {} to stream using {}", t, getClass().getName()); //$NON-NLS-1$

        entityStream.write(t.getBytes(ProviderUtils.getCharset(mediaType)));
    }

}

@@ -1031,16 +1031,47 @@
 ntity;%0A%0A
+import java.io.BufferedWriter;%0A
 import j
@@ -1082,32 +1082,32 @@
 io.IOException;%0A
-
 import java.io.I
@@ -1139,32 +1139,67 @@
 o.OutputStream;%0A
+import java.io.OutputStreamWriter;%0A
 import java.io.U
@@ -1263,24 +1263,24 @@
 Annotation;%0A
-
 import java.
@@ -1297,16 +1297,49 @@
 ct.Type;
+%0Aimport java.nio.charset.Charset;
 %0A%0Aimport
@@ -4038,17 +4038,9 @@
 n %7B%0A
-        
 %0A
+
     
@@ -4225,37 +4225,41 @@
     
-entityStream.write(t.getBytes
+Charset charset = Charset.forName
 (Pro
@@ -4291,16 +4291,210 @@
 iaType))
+;%0A        OutputStreamWriter writer = new OutputStreamWriter(entityStream, charset);%0A        BufferedWriter bw = new BufferedWriter(writer);%0A        bw.write(t, 0, t.length());%0A        bw.flush(
 );%0A    %7D

Update StringProvider to increase performance