eu.pursuit.core.ScopeID.java Source code

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Here is the source code for eu.pursuit.core.ScopeID.java

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/*
 * Copyright (C) 2011  Christos Tsilopoulos, Mobile Multimedia Laboratory, 
 * Athens University of Economics and Business 
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 3 as published by the Free Software Foundation.
 *
 * See LICENSE and COPYING for more details.
 */

package eu.pursuit.core;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.codec.binary.Hex;

public class ScopeID {

    public static int SEGMENT_SIZE = 8;

    private final List<ByteIdentifier> list = new ArrayList<ByteIdentifier>();;
    private String str = "";

    public ScopeID() {
    }

    public ScopeID(List<ByteIdentifier> ids) {
        Util.checkNull(ids);
        for (ByteIdentifier byteIdentifier : ids) {
            addSegment(byteIdentifier);
        }
    }

    public ScopeID(ByteIdentifier id) {
        addSegment(id);
    }

    public ScopeID addSegment(ByteIdentifier identifier) {
        Util.checkNull(identifier);
        if (identifier.length() != SEGMENT_SIZE) {
            throw new IllegalArgumentException("invalid segment size: " + identifier.length());
        }

        if (!this.list.add(identifier)) {
            throw new RuntimeException("failed to add to list");
        }

        String hex = Hex.encodeHexString(identifier.getId());
        str += "/" + hex;
        return this;
    }

    public ByteIdentifier get(int index) {
        return this.list.get(index);
    }

    public int getLength() {
        int totalLength = 0;
        for (ByteIdentifier id : list) {
            totalLength += id.getId().length;
        }
        return totalLength;
    }

    public byte[] toByteArray() {
        ByteBuffer buffer = ByteBuffer.allocate(getLength());
        fill(buffer);
        return buffer.array();
    }

    public void fill(ByteBuffer buffer) {
        for (ByteIdentifier id : list) {
            buffer.put(id.getId());
        }
    }

    @Override
    public int hashCode() {
        return list.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        ScopeID otherScope = (ScopeID) obj;
        return list.equals(otherScope.list);
    }

    @Override
    public String toString() {
        return str;
    }
}