/*

  * 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.commons.flatfile;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 /**

  * Stores string representations of objects in a (fixed-length) byte array.

  * @version $Revision: 757266 $ $Date: 2009-03-22 17:12:27 -0500 (Sun, 22 Mar 2009) $

  */

 public class Field extends PadJustifyFieldSupport {

     private static final long serialVersionUID = 3939293448043882440L;

     private Overflow overflow;

     private byte[] buffer;

     /**

      * Create a new Field.

      * @param size of field

      */

     public Field(int size) {

         this(new byte[size]);

     }

     /**

      * Create and initialize a new Field.

      * @param buffer byte[] which is not copied, but used directly.

      */

     public Field(byte[] buffer) {

         this.buffer = buffer;

     }

     /**

      * {@inheritDoc}

      */

     public int length() {

         return buffer.length;

     }

     /**

      * {@inheritDoc}

      */

     public synchronized void readFrom(InputStream is) throws IOException {

         is.read(buffer);

     }

     /**

      * {@inheritDoc}

      */

     public synchronized void writeTo(OutputStream os) throws IOException {

         os.write(buffer);

     }

     /**

      * {@inheritDoc}

      */

     public void setValue(byte[] b) {

         getOverflow().check(b, buffer.length);

         super.setValue(b);

     }

     /**

      * {@inheritDoc}

      */

     public byte[] getValue() {

         return buffer;

     }

     /**

      * {@inheritDoc}

      */

     public Field clone() {

         Field result = (Field) super.clone();

         result.buffer = new byte[buffer.length];

         System.arraycopy(buffer, 0, result.buffer, 0, buffer.length);

         return result;

     }

     /**

      * Get the overflow.

      * @return Overflow

      */

     public Overflow getOverflow() {

         return overflow == null ? Overflow.ERROR : overflow;

     }

     /**

      * Set the overflow.

      * @param overflow Overflow

      */

     public void setOverflow(Overflow overflow) {

         this.overflow = overflow;

     }

     /**

      * {@inheritDoc}

      */

     protected int getPadJustifyLength() {

         return length();

     }

 }