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/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2017 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, Max Planck
 * Institute of Molecular Cell Biology and Genetics, University of
 * Konstanz, and KNIME GmbH.
 * %%
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 * 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.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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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();
	}

}