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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/* ====================================================================
   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.poi.hdgf.pointers;

/**
 * Base class of pointers, which hold metadata and offsets about
 *  blocks elsewhere in the file
 */
public abstract class Pointer {
    private int type;
    private int address;
    private int offset;
    private int length;
    private short format;

    public int getAddress() {
        return address;
    }
    public short getFormat() {
        return format;
    }
    public int getLength() {
        return length;
    }
    public int getOffset() {
        return offset;
    }
    public int getType() {
        return type;
    }

    public abstract int getSizeInBytes();
    public abstract int getNumPointersOffset(byte[] data);
    public abstract int getNumPointers(int offset, byte[] data);
    public abstract int getPostNumPointersSkip();

    public abstract boolean destinationHasStrings();
    public abstract boolean destinationHasPointers();
    public abstract boolean destinationHasChunks();
    public abstract boolean destinationCompressed();

    protected void setType(int type) {
        this.type = type;
    }
    protected void setAddress(int address) {
        this.address = address;
    }
    protected void setOffset(int offset) {
        this.offset = offset;
    }
    protected void setLength(int length) {
        this.length = length;
    }
    protected void setFormat(short format) {
        this.format = format;
    }
    
    protected boolean isFormatBetween(int min, int max) {
        return (min <= format && format < max);
    }

}