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java symbolic computing library and mathematical editor

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package jscl.engine;

import java.io.Reader;
import javax.script.AbstractScriptEngine;
import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptException;
import javax.script.SimpleBindings;
import jscl.math.Expression;
import jscl.math.Generic;
import jscl.math.NotFunctionException;
import jscl.text.ParseException;

public class Engine extends AbstractScriptEngine {
	private final ScriptEngineFactory factory;

	public Engine(final ScriptEngineFactory factory) {
		this.factory = factory;
	}

	public ScriptEngineFactory getFactory() {
		return factory;
	}

	public Bindings createBindings() {
		return new SimpleBindings();
	}

	public Object eval(final String script, final ScriptContext context) throws ScriptException {
		try {
			Generic expr = Expression.valueOf(script).eval();
			try {
				return Graph.apply(expr);
			} catch (NotFunctionException e) {}
			return expr;
		} catch (final ParseException e) {
			throw new ScriptException(e);
		}
	}

	public Object eval(final Reader reader, final ScriptContext context) {
		throw new UnsupportedOperationException();
	}
}