es.uji.crypto.xades.jxades.util.ObjectId Maven / Gradle / Ivy

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package es.uji.crypto.xades.jxades.util;

import java.io.IOException;

/**
 *
 * @author miro
 */
public class ObjectId
    implements Comparable
{
    protected final int[] components;
    private final int hashCode;
    private String toString;

    public ObjectId(int[] components)
    {
        if(components == null || components.length <= 0)
            throw new IllegalArgumentException("Components[] parameter can not be NULL or empty.");

        this.components = components.clone();

        int componentLen = components.length;
        int hc = componentLen;
        for(int i = 0; i < componentLen; i++)
            hc += components[i] * 37;
        hashCode = hc;
    }

    public ObjectId(String componentsString)
        throws IOException
    {
        this(parseObjectIdentifierString(componentsString));
    }

    public boolean equals(Object other)
    {
        if(this == other)
            return true;

        if(!(other instanceof ObjectId))
            return false;

        return compareTo((ObjectId)other) == 0;
    }

    public int compareTo(ObjectId other)
    {
        int size;
        if(components.length < other.components.length)
            size = components.length;
        else
            size = other.components.length;

        int i = 0;
        while(i < size)
        {
            int result = components[i] - other.components[i];
            if(result != 0)
                return result;
            i++;
        }

        return components.length - other.components.length;
    }

    public int[] getComponents()
    {
        return components.clone();
    }

    public String toString()
    {
        if(toString == null)
        {
            StringBuilder sb = new StringBuilder();
            for(int i = 0; i < components.length; i++)
            {
                if(i > 0)
                    sb.append('.');
                sb.append(components[i]);
            }

            toString = sb.toString();
        }

        return toString;
    }

    public int hashCode()
    {
        return hashCode;
    }

    private static int[] parseObjectIdentifierString(String objId)
        throws IOException
    {
        try
        {
            String[] strValues = objId.split("\\.");
            int[] intValues = new int[strValues.length];
            for(int i = 0; i < strValues.length; i++)
            {
                intValues[i] = Integer.parseInt(strValues[i].trim());
            }

            return intValues;
        }
        catch(Exception ex)
        {
            throw new IOException("Invalid ObjectId format: " + objId + " - " + ex.toString());
        }
    }
}