001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.commons.jexl2;
018    
019    /**
020     * <p>A JEXL Script.</p>
021     * <p>A script is some valid JEXL syntax to be executed with
022     * a given set of {@link JexlContext} variabless.</p>
023     * <p>A script is a group of statements, separated by semicolons.</p>
024     * <p>The statements can be <code>blocks</code> (curly braces containing code),
025     * Control statements such as <code>if</code> and <code>while</code>
026     * as well as expressions and assignment statements.</p>
027     *  
028     * @since 1.1
029     */
030    public interface Script {
031        /**
032         * Executes the script with the variables contained in the
033         * supplied {@link JexlContext}. 
034         * 
035         * @param context A JexlContext containing variables.
036         * @return The result of this script, usually the result of 
037         *      the last statement.
038         */
039        Object execute(JexlContext context);
040    
041        /**
042         * Returns the text of this Script.
043         * @return The script to be executed.
044         */
045        String getText();
046    
047    }