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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.

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/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2016 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, and Max Planck
 * Institute of Molecular Cell Biology and Genetics.
 * %%
 * 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.script;

import java.io.Reader;
import java.io.Writer;
import java.util.List;

import javax.script.Bindings;
import javax.script.ScriptContext;

/**
 * A minimal implementation of {@link javax.script.ScriptContext} for use in the
 * {@link AbstractScriptEngine}.
 * 
 * @author Johannes Schindelin
 */
public class AbstractScriptContext implements ScriptContext {

	protected Reader reader;
	protected Writer writer, errorWriter;

	@Override
	public Reader getReader() {
		return reader;
	}

	@Override
	public Writer getWriter() {
		return writer;
	}

	@Override
	public Writer getErrorWriter() {
		return errorWriter;
	}

	@Override
	public void setReader(final Reader reader) {
		this.reader = reader;
	}

	@Override
	public void setWriter(final Writer writer) {
		this.writer = writer;
	}

	@Override
	public void setErrorWriter(final Writer errorWriter) {
		this.errorWriter = errorWriter;
	}

	// (Possibly) unsupported operations
	// The SciJava scripting framework does not require them to work properly.

	@Override
	public Object getAttribute(final String key) {
		throw new UnsupportedOperationException();
	}

	@Override
	public Object getAttribute(final String key, final int value) {
		throw new UnsupportedOperationException();
	}

	@Override
	public int getAttributesScope(final String scope) {
		throw new UnsupportedOperationException();
	}

	@Override
	public Bindings getBindings(final int scope) {
		throw new UnsupportedOperationException();
	}

	@Override
	public List getScopes() {
		throw new UnsupportedOperationException();
	}

	@Override
	public Object removeAttribute(final String key, final int scope) {
		throw new UnsupportedOperationException();
	}

	@Override
	public void
		setAttribute(final String key, final Object value, final int scope)
	{
		throw new UnsupportedOperationException();
	}

	@Override
	public void setBindings(final Bindings bindings, final int scope) {
		throw new UnsupportedOperationException();
	}

}