src/main/java/org/apache/commons/ognl/ASTInstanceof.java

package org.apache.commons.ognl;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * $Id$
 */
public class ASTInstanceof
    extends SimpleNode
    implements NodeType
{
    private String targetType;

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

    public ASTInstanceof( OgnlParser p, int id )
    {
        super( p, id );
    }

    void setTargetType( String targetType )
    {
        this.targetType = targetType;
    }

    String getTargetType()
    {
        return targetType;
    }

    protected Object getValueBody( OgnlContext context, Object source )
        throws OgnlException
    {
        Object value = children[0].getValue( context, source );
        return OgnlRuntime.isInstance( context, value, targetType ) ? Boolean.TRUE : Boolean.FALSE;
    }

    public Class getGetterClass()
    {
        return boolean.class;
    }

    public Class getSetterClass()
    {
        return null;
    }

    public String toGetSourceString( OgnlContext context, Object target )
    {
        try
        {

            String ret = "";

            if ( ASTConst.class.isInstance( children[0] ) )
            {
                ret = ( (Boolean) getValueBody( context, target ) ).toString();
            }
            else
            {
                ret = children[0].toGetSourceString( context, target ) + " instanceof " + targetType;
            }
            context.setCurrentType( Boolean.TYPE );

            return ret;

        }
        catch ( Throwable t )
        {
            throw OgnlOps.castToRuntime( t );
        }
    }

    public String toSetSourceString( OgnlContext context, Object target )
    {
        return toGetSourceString( context, target );
    }

    public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data )
        throws OgnlException
    {
        return visitor.visit( this, data );
    }
}