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package com.wutka.dtd;
import java.io.*;
/** Represents the various cardinality values for a DTD item.
* <bl>
* <li>NONE indicates no cardinality</li>
* <li>OPTIONAL indicates an optional value (specified by ?)</li>
* <li>ZEROMANY indicates zero-to-many values (specified by *)</li>
* <li>ONEMANY indicates an one-to-many values (specified by +)</li>
* </bl>
*
* @author Mark Wutka
* @version $Revision: 1.16 $ $Date: 2002/07/19 01:20:11 $ by $Author: wutka $
*/
public class DTDCardinal implements DTDOutput
{
/** Indicates no cardinality (implies a single object) */
public static final DTDCardinal NONE = new DTDCardinal(0, "NONE");
/** Indicates that an item is optional (zero-to-one) */
public static final DTDCardinal OPTIONAL = new DTDCardinal(1, "OPTIONAL");
/** Indicates that there can be zero-to-many occurrances of an item */
public static final DTDCardinal ZEROMANY = new DTDCardinal(2, "ZEROMANY");
/** Indicates that there can be one-to-many occurrances of an item */
public static final DTDCardinal ONEMANY = new DTDCardinal(3, "ONEMANY");
public int type;
public String name;
public DTDCardinal(int aType, String aName)
{
type = aType;
name = aName;
}
public boolean equals(Object ob)
{
if (ob == this) return true;
if (!(ob instanceof DTDCardinal)) return false;
DTDCardinal other = (DTDCardinal) ob;
if (other.type == type) return true;
return false;
}
/** Writes the notation for this cardinality value */
public void write(PrintWriter out)
throws IOException
{
if (this == NONE) return;
if (this == OPTIONAL)
{
out.print("?");
}
else if (this == ZEROMANY)
{
out.print("*");
}
else if (this == ONEMANY)
{
out.print("+");
}
}
}
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