net.sandius.rembulan.env.RuntimeEnvironments Maven / Gradle / Ivy
/*
* Copyright 2016 Miroslav Janíček
*
* 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.sandius.rembulan.env;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Common implementations of runtime environments.
*/
public final class RuntimeEnvironments {
private RuntimeEnvironments() {
// not to be instantiated
}
/**
* Returns the system runtime environment.
*
* Methods in this environment methods delegate to the system environment accessible
* by the Java Virtual Machine.
*
* @return the system runtime environment
*/
public static RuntimeEnvironment system() {
return SystemRuntimeEnvironment.getInstance();
}
/**
* Returns the system runtime environment that uses the specified standard input,
* output and error streams.
*
* @param in the standard input stream, may be {@code null}
* @param out the standard output stream, may be {@code null}
* @param err the standard error stream, may be {@code null}
* @return a system runtime environment that uses the specified streams for its I/O
*/
public static RuntimeEnvironment system(InputStream in, OutputStream out, OutputStream err) {
return new SystemRuntimeEnvironment(in, out, err);
}
}