//--------------------------------------------------------------------------
// 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 ognl.enhance.UnsupportedCompilationException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
/**
* @author Luke Blanshard (blanshlu@netscape.net)
* @author Drew Davidson (drew@ognl.org)
*/
class ASTSelectFirst extends SimpleNode
{
public ASTSelectFirst(int id) {
super(id);
}
public ASTSelectFirst(OgnlParser p, int id) {
super(p, id);
}
protected Object getValueBody( OgnlContext context, Object source ) throws OgnlException
{
Node expr = _children[0];
List answer = new ArrayList();
ElementsAccessor elementsAccessor = OgnlRuntime.getElementsAccessor( OgnlRuntime.getTargetClass(source) );
for (Enumeration e = elementsAccessor.getElements(source); e.hasMoreElements(); ) {
Object next = e.nextElement();
if (OgnlOps.booleanValue(expr.getValue(context, next))) {
answer.add(next);
break;
}
}
return answer;
}
public String toString()
{
return "{^ " + _children[0] + " }";
}
public String toGetSourceString(OgnlContext context, Object target)
{
throw new UnsupportedCompilationException("Eval expressions not supported as native java yet.");
}
public String toSetSourceString(OgnlContext context, Object target)
{
throw new UnsupportedCompilationException("Eval expressions not supported as native java yet.");
}
}