package edu.stanford.rt.datatype;

/**
 * @author Ninghui Li, Sandra Qiu<br>
 * 
 * Implementation of <code>StringType</code> element
 * 
 */
public class StringType extends OrderedType
{
	private boolean ignoreCase;
	private boolean ordered;

    /**
     * Constructor for StringType.
     */
	public StringType(
		String name,
		boolean ignoreCase,
		boolean ordered)
	{
		super(name);
		this.ignoreCase = ignoreCase;
		this.ordered = ordered;
	}


	/* (non-Javadoc)
	 * @see edu.stanford.rt.datatype.SimpleType#isValidValue(DataValue)
	 */
	public boolean isValidValue(DataValue value)
	{
		if (!(value instanceof StringValue))
			return false;
		return true;
	}

	/* (non-Javadoc)
	 * @see edu.stanford.rt.datatype.OrderedType#compares(DataValue, DataValue)
	 */
	public int compares(DataValue value1, DataValue value2)
	{
		if (!(value1 instanceof StringValue)
			|| !(value2 instanceof StringValue))
			throw new IllegalArgumentException("Wrong argument type");

		String val1 = ((StringValue) value1).getValue();
		String val2 = ((StringValue) value2).getValue();

		if (ignoreCase)
			return val1.toLowerCase().compareTo(val2.toLowerCase());
		else
			return val1.compareTo(val2);
	}

	/**
	 * Method isIgnoreCase.
	 * @return boolean
	 */
	public boolean isIgnoreCase()
	{
		return ignoreCase;
	}
	/**
	 * Method isOrdered.
	 * @return boolean
	 */
	public boolean isOrdered()
	{
		return ordered;
	}

	/* (non-Javadoc)
	 * @see edu.stanford.rt.datatype.DataType#toString(String)
	 */
	public String toString(String indent)
	{
		String thisIndent = indent + "  ";
		StringBuffer sb = new StringBuffer();

		sb
			.append(thisIndent)
			.append("StringType: ")
			.append(getName())
			.append("  ")
			.append("ignoreCase = ")
			.append(ignoreCase)
			.append("  ")
			.append("ordered = ")
			.append(ordered)
			.append("\n");

		return sb.toString();
	}

}