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X-definition 4.2 (Open Source Software)
There is a newer version: 42.2.13
package org.xdef.impl.code;

import java.net.URI;
import java.net.URISyntaxException;
import org.xdef.XDValue;
import org.xdef.XDValueAbstract;
import org.xdef.XDValueType;
import static org.xdef.XDValueType.ANYURI;
import org.xdef.msg.SYS;
import org.xdef.sys.SIllegalArgumentException;

/** Implements the internal object with URI value.
 * @author Vaclav Trojan
 */
public final class DefURI extends XDValueAbstract {

	/** The file value. */
	private final URI _value;

	/** Creates a new instance of DefURI as null.*/
	public DefURI() {_value = null;}

	/** Creates a new instance of DefURI
	 * @param value The initial value of object.
	 */
	public DefURI(final URI value) {_value = value;}

	/** Creates a new instance of DefURI
	 * @param value The string with initial value of object ("true" or "false").
	 */
	public DefURI(final String value) {
		try {
			_value = new URI(value);
		} catch (URISyntaxException ex) {
			throw new RuntimeException(ex);
		}
	}

////////////////////////////////////////////////////////////////////////////////
// Implementation of XDValue interface
////////////////////////////////////////////////////////////////////////////////

	@Override
	/** Get associated object.
	 * @return the associated object or null.
	 */
	public Object getObject() {return _value;}

	@Override
	/** Get type of value.
	 * @return The id of item type.
	 */
	public short getItemId() {return XD_ANYURI;}

	@Override
	/** Get ID of the type of value
	 * @return enumeration item of this type.
	 */
	public XDValueType getItemType() {return ANYURI;}

	@Override
	/** Get value as String.
	 * @return The string from value.
	 */
	public String toString() {return stringValue();}

	@Override
	/** Get string value of this object.
	 * @return string value of this object.
	 */
	public String stringValue() {return _value==null ? "" : _value.toString();}

	@Override
	/** Clone the item.
	 * @return the object with the copy of this one.
	 */
	public XDValue cloneItem() {return new DefURI(_value);}

	@Override
	public int hashCode() {return _value == null ? 1 : _value.hashCode();}

	@Override
	public boolean equals(final Object arg) {
		return arg instanceof XDValue ?  equals((XDValue) arg) : false;
	}

	@Override
	/** Check whether some other XDValue object is "equal to" this one.
	 * @param arg other XDValue object to which is to be compared.
	 * @return true if argument is same type as this XDValue and the value
	 * of the object is comparable and equals to this one.
	 */
	public boolean equals(final XDValue arg) {
		if (isNull()) {
			return arg == null || arg.isNull();
		}
		if (arg == null || arg.isNull()) {
			return false;
		}
		return _value.equals(arg.getObject());
	}

	@Override
	/** Compares this object with the other DefURI object.
	 * @param arg other DefURI object to which is to be compared.
	 * @return returns 0 if this object is equal to the specified object.
	 * @throws SIllegalArgumentException if arguments are not comparable.
	 */
	public int compareTo(final XDValue arg) throws SIllegalArgumentException {
		if (arg.getItemId() == XD_BOOLEAN) {
			if (equals(arg)) return 0;
		}
		throw new SIllegalArgumentException(SYS.SYS085);//Incomparable arguments
	}

	@Override
	/** Check if the object is null.
	 * @return true if the object is null otherwise returns
	 * false.
	 */
	public boolean isNull() {return _value == null;}
}