/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.impossibl.postgres.system.procs;
import com.impossibl.postgres.system.Context;
import com.impossibl.postgres.types.Type;
import java.io.IOException;
import io.netty.buffer.ByteBuf;
public abstract class TextEncoder implements Type.Codec.Encoder {
abstract void encode(Type type, StringBuilder buffer, Object val, Context context) throws IOException;
@Override
public void encode(Type type, Object buffer, Object value, Context context) throws IOException {
if (buffer instanceof ByteBuf) {
ByteBuf channelBuffer = (ByteBuf) buffer;
if (value == null) {
channelBuffer.writeInt(-1);
}
else {
StringBuilder tmp = new StringBuilder();
encode(type, tmp, value, context);
byte[] bytes = tmp.toString().getBytes(context.getCharset());
channelBuffer.writeInt(bytes.length);
channelBuffer.writeBytes(bytes);
}
}
else {
encode(type, (StringBuilder)buffer, value, context);
}
}
@Override
public int length(Type type, Object val, Context context) throws IOException {
StringBuilder computer = new StringBuilder();
encode(type, computer, val, context);
return computer.length() + 4;
}
}