package org.apache.poi.ddf;

import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.HexDump;

/**
 * A simple property is of fixed length and as a property number in addition
 * to a 32-bit value.  Properties that can't be stored in only 32-bits are
 * stored as EscherComplexProperty objects.
 *
 * @author Glen Stampoultzis (glens at apache.org)
 */
public class EscherSimpleProperty extends EscherProperty
{
    protected int propertyValue;

    /**
     * The id is distinct from the actual property number.  The id includes the property number the blip id
     * flag and an indicator whether the property is complex or not.
     */
    public EscherSimpleProperty( short id, int propertyValue )
    {
        super( id );
        this.propertyValue = propertyValue;
    }

    /**
     * Constructs a new escher property.  The three parameters are combined to form a property
     * id.
     */
    public EscherSimpleProperty( short propertyNumber, boolean isComplex, boolean isBlipId, int propertyValue )
    {
        super( propertyNumber, isComplex, isBlipId );
        this.propertyValue = propertyValue;
    }

    /**
     * Serialize the simple part of the escher record.
     *
     * @return the number of bytes serialized.
     */
    public int serializeSimplePart( byte[] data, int offset )
    {
        LittleEndian.putShort(data, offset, getId());
        LittleEndian.putInt(data, offset + 2, propertyValue);
        return 6;
    }

    /**
     * Escher properties consist of a simple fixed length part and a complex variable length part.
     * The fixed length part is serialized first.
     */
    public int serializeComplexPart( byte[] data, int pos )
    {
        return 0;
    }

    /**
     * @return  Return the 32 bit value of this property.
     */
    public int getPropertyValue()
    {
        return propertyValue;
    }

    /**
     * Returns true if one escher property is equal to another.
     */
    public boolean equals( Object o )
    {
        if ( this == o ) return true;
        if ( !( o instanceof EscherSimpleProperty ) ) return false;

        final EscherSimpleProperty escherSimpleProperty = (EscherSimpleProperty) o;

        if ( propertyValue != escherSimpleProperty.propertyValue ) return false;
        if ( getId() != escherSimpleProperty.getId() ) return false;

        return true;
    }

    /**
     * Returns a hashcode so that this object can be stored in collections that
     * require the use of such things.
     */
    public int hashCode()
    {
        return propertyValue;
    }

    /**
     * @return the string representation of this property.
     */
    public String toString()
    {
        return "propNum: " + getPropertyNumber()
                + ", propName: " + EscherProperties.getPropertyName( getPropertyNumber() )
                + ", complex: " + isComplex()
                + ", blipId: " + isBlipId()
                + ", value: " + propertyValue + " (0x" + HexDump.toHex(propertyValue) + ")";
    }

}