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Groovy: A powerful, dynamic language for the JVM
/*
* The initial contribution was derived from the reference implementation
* developed by Sun in consultation with the Groovy community. The reference
* implementation had the following license header:
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met: Redistributions of source code
* must retain the above copyright notice, this list of conditions and the following disclaimer.
* 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. Neither the name of the Sun Microsystems nor the names of
* is contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 OWNER
* 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.
*
* Subsequent modifications by the Groovy community have been done under the Apache License v2:
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.codehaus.groovy.jsr223;
import groovy.lang.GroovySystem;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* A factory class conforming to JSR-223 which is used to instantiate
* Groovy ScriptEngines and also exposes metadata describing
* Groovy's engine class.
*
* @author Adapted from original by Mike Grogan
* @author Adapted from original by A. Sundararajan
* @author Jim White
* @author Guillaume Laforge
*/
public class GroovyScriptEngineFactory implements ScriptEngineFactory {
private static final String VERSION = "2.0";
private static final String SHORT_NAME = "groovy";
private static final String LANGUAGE_NAME = "Groovy";
public String getEngineName() {
return "Groovy Scripting Engine";
}
/**
* Note that the scripting.dev.java.net engine had this backwards.
* The engine version refers to this engine implementation.
* Whereas language version refers to the groovy implementation
* (which is obtained from the runtime).
*/
public String getEngineVersion() {
return VERSION;
}
/**
* This is also different than scripting.dev.java.net which used an
* initial lowercase. But these are proper names and should be capitalized.
*/
public String getLanguageName() {
return LANGUAGE_NAME;
}
public String getLanguageVersion() {
return GroovySystem.getVersion();
}
public List getExtensions() {
return EXTENSIONS;
}
public List getMimeTypes() {
return MIME_TYPES;
}
public List getNames() {
return NAMES;
}
public Object getParameter(String key) {
if (ScriptEngine.NAME.equals(key)) {
return SHORT_NAME;
} else if (ScriptEngine.ENGINE.equals(key)) {
return getEngineName();
} else if (ScriptEngine.ENGINE_VERSION.equals(key)) {
return VERSION;
} else if (ScriptEngine.LANGUAGE.equals(key)) {
return LANGUAGE_NAME;
} else if (ScriptEngine.LANGUAGE_VERSION.equals(key)) {
return GroovySystem.getVersion();
} else if ("THREADING".equals(key)) {
return "MULTITHREADED";
} else {
throw new IllegalArgumentException("Invalid key");
}
}
public ScriptEngine getScriptEngine() {
return new GroovyScriptEngineImpl();
}
public String getMethodCallSyntax(String obj, String method,
String... args) {
String ret = obj + "." + method + "(";
int len = args.length;
if (len == 0) {
ret += ")";
return ret;
}
for (int i = 0; i < len; i++) {
ret += args[i];
if (i != len - 1) {
ret += ",";
} else {
ret += ")";
}
}
return ret;
}
public String getOutputStatement(String toDisplay) {
StringBuilder buf = new StringBuilder();
buf.append("println(\"");
int len = toDisplay.length();
for (int i = 0; i < len; i++) {
char ch = toDisplay.charAt(i);
switch (ch) {
case '"':
buf.append("\\\"");
break;
case '\\':
buf.append("\\\\");
break;
default:
buf.append(ch);
break;
}
}
buf.append("\")");
return buf.toString();
}
public String getProgram(String... statements) {
StringBuilder ret = new StringBuilder();
int len = statements.length;
for (int i = 0; i < len; i++) {
ret.append(statements[i]);
ret.append('\n');
}
return ret.toString();
}
private static final List NAMES;
private static final List EXTENSIONS;
private static final List MIME_TYPES;
static {
List n = new ArrayList(2);
n.add(SHORT_NAME);
n.add(LANGUAGE_NAME);
NAMES = Collections.unmodifiableList(n);
n = new ArrayList(1);
n.add("groovy");
EXTENSIONS = Collections.unmodifiableList(n);
n = new ArrayList(1);
n.add("application/x-groovy");
MIME_TYPES = Collections.unmodifiableList(n);
}
}