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package com.wutka.dtd;
import java.util.*;
import java.io.*;
/** Represents an enumeration of attribute values
*
* @author Mark Wutka
* @version $Revision: 1.16 $ $Date: 2002/07/19 01:20:11 $ by $Author: wutka $
*/
public class DTDEnumeration implements DTDOutput
{
protected Vector items;
/** Creates a new enumeration */
public DTDEnumeration()
{
items = new Vector();
}
/** Adds a new value to the list of values */
public void add(String item)
{
items.addElement(item);
}
/** Removes a value from the list of values */
public void remove(String item)
{
items.removeElement(item);
}
/** Returns the values as an array */
public String[] getItems()
{
String[] retval = new String[items.size()];
items.copyInto(retval);
return retval;
}
/** Returns the values as a vector (not a clone!) */
public Vector getItemsVec()
{
return items;
}
/** Writes out a declaration for this enumeration */
public void write(PrintWriter out)
throws IOException
{
out.print("( ");
Enumeration e = getItemsVec().elements();
boolean isFirst = true;
while (e.hasMoreElements())
{
if (!isFirst) out.print(" | ");
isFirst = false;
out.print(e.nextElement());
}
out.print(")");
}
public boolean equals(Object ob)
{
if (ob == this) return true;
if (!(ob instanceof DTDEnumeration)) return false;
DTDEnumeration other = (DTDEnumeration) ob;
return items.equals(other.items);
}
/** Returns the items in the enumeration */
public String[] getItem() { return getItems(); }
/** Sets the items in the enumeration */
public void setItem(String[] newItems)
{
items = new Vector(newItems.length);
for (int i=0; i < newItems.length; i++)
{
items.addElement(newItems[i]);
}
}
/** Stores an item in the enumeration */
public void setItem(String item, int i)
{
items.setElementAt(item, i);
}
/** Retrieves an item from the enumeration */
public String getItem(int i)
{
return (String) items.elementAt(i);
}
}
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