class COSBoolean extends COSBase
{
    /**
     * The true boolean token.
     */
    private static final byte[] TRUE_BYTES = { 116, 114, 117, 101 }; // "true".getBytes("ISO-8859-1")
    /**
     * The false boolean token.
     */
    private static final byte[] FALSE_BYTES = { 102, 97, 108, 115, 101 }; // "false".getBytes("ISO-8859-1")

    /**
     * The PDF true value.
     */
    public static final COSBoolean TRUE = new COSBoolean( true );

    /**
     * The PDF false value.
     */
    public static final COSBoolean FALSE = new COSBoolean( false );

    private final boolean value;

    /**
     * Constructor.
     *
     * @param aValue The boolean value.
     */
    private COSBoolean(boolean aValue)
    {
        value = aValue;
    }

    /**
     * This will get the value that this object wraps.
     *
     * @return The boolean value of this object.
     */
    public boolean getValue()
    {
        return value;
    }

    /**
     * This will get the value that this object wraps.
     *
     * @return The boolean value of this object.
     */
    public Boolean getValueAsObject()
    {
        return value ? Boolean.TRUE : Boolean.FALSE;
    }

    /**
     * This will get the boolean value.
     *
     * @param value Parameter telling which boolean value to get.
     *
     * @return The single boolean instance that matches the parameter.
     */
    public static COSBoolean getBoolean( boolean value )
    {
        return value ? TRUE : FALSE;
    }

    /**
     * This will get the boolean value.
     *
     * @param value Parameter telling which boolean value to get.
     *
     * @return The single boolean instance that matches the parameter.
     */
    public static COSBoolean getBoolean( Boolean value )
    {
        return getBoolean( value.booleanValue() );
    }

    /**
     * visitor pattern double dispatch method.
     *
     * @param visitor The object to notify when visiting this object.
     * @throws IOException If an error occurs while visiting this object.
     */
    @Override
    public void accept(ICOSVisitor visitor) throws IOException
    {
        visitor.visitFromBoolean(this);
    }

    /**
     * Return a string representation of this object.
     *
     * @return The string value of this object.
     */
    @Override
    public String toString()
    {
        return String.valueOf( value );
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int hashCode() {<FILL_FUNCTION_BODY>}
    
    /**
     * {@inheritDoc}
     */
    public boolean equals(Object obj)
    {
        return this == obj; // this is correct because there are only two COSBoolean objects.
    }

    /**
     * This will write this object out to a PDF stream.
     *
     * @param output The stream to write this object out to.
     *
     * @throws IOException If an error occurs while writing out this object.
     */
    public void writePDF( OutputStream output ) throws IOException
    {
        if( value )
        {
            output.write( TRUE_BYTES );
        }
        else
        {
            output.write( FALSE_BYTES );
        }
    }
}

        //taken from java.lang.Boolean
        return value ? 1231 : 1237;
    
<methods>public void <init>() ,public abstract void accept(org.apache.pdfbox.cos.ICOSVisitor) throws java.io.IOException,public org.apache.pdfbox.cos.COSBase getCOSObject() ,public org.apache.pdfbox.cos.COSObjectKey getKey() ,public boolean isDirect() ,public void setDirect(boolean) ,public void setKey(org.apache.pdfbox.cos.COSObjectKey) <variables>private boolean direct,private org.apache.pdfbox.cos.COSObjectKey key