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/*******************************************************************************
 * Copyright (c) 2011 Michael Doberenz.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Michael Doberenz - initial API and implementation
 ******************************************************************************/
package org.fuwjin.chessur.expression;

import org.fuwjin.grin.env.Trace;

/**
 * An expression representing redirected script input.
 */
public class ScriptInput implements Expression {
   private final Expression spec;
   private final Expression value;

   /**
    * Creates a new instance.
    * @param script the script
    * @param value the redirected input
    */
   public ScriptInput(final Expression script, final Expression value) {
      spec = script;
      this.value = value;
   }

   @Override
   public Object resolve(final Trace trace) throws AbortedException, ResolveException {
      final Object val = value.resolve(trace);
      final Trace input = trace.newInput(String.valueOf(val));
      return spec.resolve(input);
   }

   /**
    * Returns the script.
    * @return the script
    */
   public Expression spec() {
      return spec;
   }

   /**
    * Returns the input value.
    * @return the value
    */
   public Expression value() {
      return value;
   }
}