//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 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.
// Neither the name of the Drew Davidson nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS 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 THE
// COPYRIGHT OWNER OR 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.
//--------------------------------------------------------------------------
package ognl;
import java.util.*;
/**
* Implementation of PropertyAccessor that provides "property" reference to
* "nextElement" (aliases to "next" also) and "hasMoreElements" (also aliased
* to "hasNext").
* @author Luke Blanshard (blanshlu@netscape.net)
* @author Drew Davidson (drew@ognl.org)
*/
public class
EnumerationPropertyAccessor extends
ObjectPropertyAccessor
implements
PropertyAccessor // This is here to make javadoc show this class as an implementor
{
public
Object getProperty(
Map context,
Object target,
Object name ) throws
OgnlException
{
Object result;
Enumeration e = (
Enumeration)
target;
if (
name instanceof
String ) {
if (
name.
equals("next") ||
name.
equals("nextElement")) {
result =
e.
nextElement();
} else {
if (
name.
equals("hasNext") ||
name.
equals("hasMoreElements")) {
result =
e.
hasMoreElements() ?
Boolean.
TRUE :
Boolean.
FALSE;
} else {
result = super.getProperty(
context,
target,
name );
}
}
} else {
result = super.getProperty(
context,
target,
name);
}
return
result;
}
public void
setProperty(
Map context,
Object target,
Object name,
Object value ) throws
OgnlException
{
throw new
IllegalArgumentException( "can't set property " +
name + " on Enumeration" );
}
}