zkoss/zk

/* InterpretContext.java

    Purpose:
        
    Description:
        
    History:
        Sat Sep 17 16:59:44     2005, Created by tomyeh

Copyright (C) 2004 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
    This program is distributed under LGPL Version 2.1 in the hope that
    it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/
package org.zkoss.web.servlet.dsp.impl;

import org.zkoss.web.servlet.dsp.DspContext;
import org.zkoss.web.servlet.dsp.Interpretation;
import org.zkoss.web.servlet.dsp.action.Action;
import org.zkoss.xel.FunctionMapper;
import org.zkoss.xel.XelContext;
import org.zkoss.xel.util.SimpleXelContext;

/**
 * Holds the context for interpreting an {@link Interpretation}.
 *
 * @author tomyeh
 */
class InterpretContext {
    final DspContext dc;
    final InterpretResolver resolver;
    XelContext xelc;
    /** The action being processing, or null if no such action. */
    Action action;

    /** Constructs an interpret context.
     */
    InterpretContext(DspContext dc) {
        this.dc = dc;
        this.resolver = new InterpretResolver(dc.getVariableResolver());
    }

    void init(FunctionMapper mapper) {
        if (this.xelc != null)
            throw new IllegalArgumentException();
        this.xelc = new SimpleXelContext(this.resolver, mapper);
    }
}