ognl.ASTProject Maven / Gradle / Ivy

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// --------------------------------------------------------------------------
// 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 ([email protected])
 * @author Drew Davidson ([email protected])
 */
public class ASTProject extends SimpleNode
{

    public ASTProject(int id)
    {
        super(id);
    }

    public ASTProject(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();) {

            answer.add(expr.getValue(context, e.nextElement()));
        }

        return answer;
    }

    public String toString()
    {
        return "{ " + _children[0] + " }";
    }

    public String toGetSourceString(OgnlContext context, Object target)
    {
        throw new UnsupportedCompilationException("Projection expressions not supported as native java yet.");
    }

    public String toSetSourceString(OgnlContext context, Object target)
    {
        throw new UnsupportedCompilationException("Projection expressions not supported as native java yet.");
    }
}