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-/* AccessibleStateSet.java -- the combined state of an accessible object
- Copyright (C) 2002 Free Software Foundation
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-package javax.accessibility;
-
-import java.util.Vector;
-
-/**
- * Describes all elements of an accessible object's state. For example, an
- * object may be enabled and have focus.
- *
- * @author Eric Blake <ebb9@email.byu.edu>
- * @see AccessibleState
- * @since 1.2
- * @status updated to 1.4
- */
-public class AccessibleStateSet
-{
- /**
- * The list of states, should be instances of AccessibleState. Don't set
- * this to null.
- *
- * @see #add(AccessibleState)
- * @see #addAll(AccessibleState[])
- * @see #remove(AccessibleState)
- * @see #contains(AccessibleState)
- * @see #toArray()
- * @see #clear()
- */
- protected Vector states = new Vector();
-
- /**
- * Create an empty state set.
- */
- public AccessibleStateSet()
- {
- }
-
- /**
- * Create a state set initialized with the given states, duplicates are
- * ignored.
- *
- * @param states the states to insert
- * @throws NullPointerException if states is null
- */
- public AccessibleStateSet(AccessibleState[] states)
- {
- addAll(states);
- }
-
- /**
- * Add a new state to the current set. Return true if the state was added,
- * as duplicates are ignored. Entering a null state will cause problems
- * later, so don't do it.
- *
- * @param state the state to add
- * @return true if the state was added
- */
- public boolean add(AccessibleState state)
- {
- return states.contains(state) ? false : states.add(state);
- }
-
- /**
- * Add all of the states to the current set. Duplicates are ignored.
- * Entering a null state will cause problems later, so don't do it.
- *
- * @param array the array of states to add
- * @throws NullPointerException if array is null
- */
- public void addAll(AccessibleState[] array)
- {
- int i = array.length;
- while (--i >= 0)
- add(array[i]);
- }
-
- /**
- * Remove a state from the set. If a state was removed, return true.
- *
- * @param state the state to remove
- * @return true if the set changed
- */
- public boolean remove(AccessibleState state)
- {
- return states.remove(state);
- }
-
- /**
- * Clear all states in the set.
- */
- public void clear()
- {
- states.clear();
- }
-
- /**
- * Check if the current state is in the set.
- *
- * @param state the state to locate
- * @return true if it is in the set
- */
- public boolean contains(AccessibleState state)
- {
- return states.contains(state);
- }
-
- /**
- * Return the state set as an array.
- *
- * @return an array of the current states
- */
- public AccessibleState[] toArray()
- {
- AccessibleState[] result = new AccessibleState[states.size()];
- states.toArray(result);
- return result;
- }
-
- /**
- * Return a localized, comma-separated string representing all states
- * in the set. This is in arbitrary order.
- *
- * @return the string representation
- * @see AccessibleBundle#toDisplayString(String, Locale)
- */
- public String toString()
- {
- int i = states.size();
- if (i == 0)
- return "";
- // Pre-allocate an average of 10 chars per state.
- StringBuffer b = new StringBuffer(i * 10);
- while (--i >= 0)
- b.append(states.get(i)).append(',');
- return b.substring(0, b.length() - 1);
- }
-} // class AccessibleStateSet