org.exolab.javasource.JNamedMap Maven / Gradle / Ivy
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* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Intalio, Inc. For written permission,
* please contact [email protected].
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
* trademark of Intalio, Inc.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* INTALIO, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 1999 (C) Intalio, Inc. All Rights Reserved.
*/
package org.exolab.javasource;
import java.util.Vector;
/**
* A simple String to Object mapping which preserves order.
*
* Note: This class is not synchronized. So be careful. :-)
*
* @author Keith Visco
* @version $Revision: 6669 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
*/
public final class JNamedMap {
//--------------------------------------------------------------------------
/** Names as mapped to objects. */
private Vector _names;
/** Objects that the names are mapped to. */
private Vector _objects;
//--------------------------------------------------------------------------
/**
* Creates a new JNamedMap.
*/
public JNamedMap() {
_names = new Vector();
_objects = new Vector();
}
/**
* Creates a new JNamedMap with the given size.
*
* @param size The initial size for this NamedMap.
*/
public JNamedMap(final int size) {
_names = new Vector(size);
_objects = new Vector(size);
}
//--------------------------------------------------------------------------
/**
* Returns the Object associated with the given name.
*
* @param name The name to search for.
* @return The Object associated with the given name.
*/
public Object get(final String name) {
int i = indexOf(name);
if (i >= 0) { return _objects.elementAt(i); }
return null;
}
/**
* Returns the Object at the given index.
*
* @param index The index of the Object to return.
* @return The Object at the given index.
*/
public Object get(final int index) {
return _objects.elementAt(index);
}
/**
* Returns the name associated with the given Object.
*
* @param obj The Object to search for.
* @return The name of the given Object.
*/
public String getNameByObject(final Object obj) {
int i = _objects.indexOf(obj);
if (i >= 0) { return (String) _names.elementAt(i); }
return null;
}
/**
* Returns a Vector of names.
*
* @return A Vector of names.
*/
public Vector getNames() {
return (Vector) _names.clone();
}
/**
* Returns a Vector of Objects.
*
* @return A Vector of Objects.
*/
public Vector getObjects() {
return (Vector) _objects.clone();
}
/**
* Returns the index of the Object which has been mapped (associated) with
* the given name.
*
* @param name The name to get the index of.
* @return The index of the Object which has been mapped (associated) to the
* given name.
*/
public int indexOf(final String name) {
for (int i = 0; i < _names.size(); i++) {
String iName = (String) _names.elementAt(i);
if (iName.equals(name)) { return i; }
}
return -1;
}
/**
* Maps (associates) an Object with a name.
*
* @param name The name to associate with the given Object.
* @param obj The Object to be mapped.
*/
public void put(final String name, final Object obj) {
int idx = indexOf(name);
if (idx >= 0) {
_objects.setElementAt(obj, idx);
} else {
//-- we may need synchronization here if we're in a multithreaded environment
_names.addElement(name);
_objects.addElement(obj);
}
}
/**
* Removes and returns the Object located at the given index.
*
* @param index The index of the Object to remove.
* @return The object removed from the map.
*/
public Object remove(final int index) {
Object obj = _objects.elementAt(index);
_objects.removeElementAt(index);
_names.removeElementAt(index);
return obj;
}
/**
* Removes and returns the Object associated with the given name.
*
* @param name The name of the Object to remove.
* @return The object removed from the map.
*/
public Object remove(final String name) {
Object obj = null;
int idx = indexOf(name);
if (idx >= 0) {
obj = _objects.elementAt(idx);
_objects.removeElementAt(idx);
_names.removeElementAt(idx);
}
return obj;
}
/**
* Returns the number of Object associations currently in this named map.
*
* @return The number of Object associations currently in this named map.
*/
public int size() {
return _names.size();
}
//--------------------------------------------------------------------------
}
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