EReduce.java

/***************************************************************************
   Copyright 2012 Emily Estes

   Licensed 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.
***************************************************************************/
package net.metanotion.simpletemplate.interpreter;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import net.metanotion.functor.Block;
import net.metanotion.scripting.ObjectServer;

final class EReduce implements Element {
	private static final Logger logger = LoggerFactory.getLogger(EReduce.class);

	private final Element left;
	private final Element right;

	public EReduce(Element left, Element right) {
		this.left = left;
		this.right = right;
	}

	@Override public Object eval(ObjectServer os, Object env) {
		logger.debug("LEFT: " + left.getClass() + " RIGHT " + right.getClass());
		final Block b = (Block) left.eval(os, env);
		logger.debug("** LEFT is " + b.getClass());
		try {
			return b.eval(right.eval(os, env));
		} catch (Exception e) { throw new RuntimeException(e); }
	}
}