/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.teeda.core.render;

 import java.io.ByteArrayInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.InputStream;

 import java.io.ObjectInputStream;

 import java.io.ObjectOutputStream;

 import java.util.zip.GZIPOutputStream;

 import javax.faces.internal.FacesConfigOptions;

 import org.seasar.framework.util.Base64Util;

 import org.seasar.framework.util.InputStreamUtil;

 import org.seasar.framework.util.OutputStreamUtil;

 import org.seasar.teeda.core.util.GZIPInputStreamUtil;

 import org.seasar.teeda.core.util.GZIPOutputStreamUtil;

 import org.seasar.teeda.core.util.ObjectInputStreamUtil;

 import org.seasar.teeda.core.util.ObjectOutputStreamUtil;

 /**

  * @author shot

  */

 public class Base64EncodeConverter implements EncodeConverter {

     public String getAsEncodeString(Object target) {

         final ByteArrayOutputStream bos = new ByteArrayOutputStream();

         GZIPOutputStream gzipOut = null;

         ObjectOutputStream oos = null;

         try {

             if (isCompressRequested()) {

                 gzipOut = GZIPOutputStreamUtil.getOutputStream(bos);

                 oos = ObjectOutputStreamUtil.getOutputStream(gzipOut);

                 ObjectOutputStreamUtil.writeObject(oos, target);

                 GZIPOutputStreamUtil.finish(gzipOut);

             } else {

                 oos = ObjectOutputStreamUtil.getOutputStream(bos);

                 ObjectOutputStreamUtil.writeObject(oos, target);

             }

             return Base64Util.encode(bos.toByteArray());

         } finally {

             OutputStreamUtil.close(oos);

             OutputStreamUtil.close(gzipOut);

             OutputStreamUtil.close(bos);

         }

     }

     public Object getAsDecodeObject(String state) {

         final byte[] bytes = Base64Util.decode(state);

         final InputStream bis = new ByteArrayInputStream(bytes);

         InputStream is = null;

         ObjectInputStream ois = null;

         try {

             if (isCompressRequested()) {

                 is = GZIPInputStreamUtil.getInputStream(bis);

                 ois = ObjectInputStreamUtil.getInputStream(is);

             } else {

                 ois = ObjectInputStreamUtil.getInputStream(bis);

             }

             return ObjectInputStreamUtil.readObject(ois);

         } finally {

             InputStreamUtil.close(ois);

             InputStreamUtil.close(is);

             InputStreamUtil.close(bis);

         }

     }

     protected boolean isCompressRequested() {

         return FacesConfigOptions.getCompressState();

     }

 }