org.scijava.parse.Main Maven / Gradle / Ivy
/*
* #%L
* Parsington: the SciJava mathematical expression parser.
* %%
* Copyright (C) 2015 - 2019 Board of Regents of the University of
* Wisconsin-Madison.
* %%
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* #L%
*/
package org.scijava.parse;
import java.io.IOException;
import org.scijava.parse.eval.DefaultEvaluator;
import org.scijava.parse.eval.EvaluatorConsole;
/**
* Launches the console-driven expression evaluator.
*
* @author Curtis Rueden
* @see EvaluatorConsole
*/
public final class Main {
private Main() {
// Prevent instantiation of utility class.
}
// -- Main method --
public static void main(final String[] args) throws IOException {
final DefaultEvaluator evaluator = new DefaultEvaluator();
if (args.length > 0) {
// Evaluate the given expressions.
for (final String expression : args) {
Object result = evaluator.evaluate(expression);
if (result instanceof Variable) {
// Unwrap the variable.
result = evaluator.get((Variable) result);
}
System.out.println(result);
}
}
else {
// Show the REPL.
new EvaluatorConsole(evaluator).showConsole();
}
}
}