Compilable.java

/*
 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.script;

import java.util.Map;
import java.io.Reader;

/**
 * The optional interface implemented by ScriptEngines whose methods compile scripts
 * to a form that can be executed repeatedly without recompilation.
 *
 * @author Mike Grogan
 * @since 1.6
 */
public interface Compilable {
    /**
     * Compiles the script (source represented as a <code>String</code>) for
     * later execution.
     *
     * @param script The source of the script, represented as a <code>String</code>.
     *
     * @return An instance of a subclass of <code>CompiledScript</code> to be executed later using one
     * of the <code>eval</code> methods of <code>CompiledScript</code>.
     *
     * @throws ScriptException if compilation fails.
     * @throws NullPointerException if the argument is null.
     *
     */

    public CompiledScript compile(String script) throws
            ScriptException;

    /**
     * Compiles the script (source read from <code>Reader</code>) for
     * later execution.  Functionality is identical to
     * <code>compile(String)</code> other than the way in which the source is
     * passed.
     *
     * @param script The reader from which the script source is obtained.
     *
     * @return An instance of a subclass of <code>CompiledScript</code> to be executed
     * later using one of its <code>eval</code> methods of <code>CompiledScript</code>.
     *
     * @throws ScriptException if compilation fails.
     * @throws NullPointerException if argument is null.
     */
    public CompiledScript compile(Reader script) throws
            ScriptException;
}