package org.apache.maven.plugins.scripting; | |
/* | |
* 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. | |
*/ | |
import javax.script.ScriptContext; | |
import javax.script.ScriptEngine; | |
import javax.script.ScriptEngineManager; | |
import javax.script.ScriptException; | |
/** | |
* Execute a script held in a string | |
* @author Rusi Popov | |
*/ | |
public class ExecuteString extends Execute | |
{ | |
/** | |
* Not null name of the engine to execute the script | |
*/ | |
private final String engineName; | |
/** | |
* The non-null script itself | |
*/ | |
private final String script; | |
/** | |
* @param engineName | |
* @param script | |
* @throws IllegalArgumentException | |
*/ | |
public ExecuteString( String engineName, String script ) throws IllegalArgumentException | |
{ | |
if ( engineName == null || engineName.trim().isEmpty() ) | |
{ | |
throw new IllegalArgumentException( "Expected a non-empty engine name provided" ); | |
} | |
this.engineName = engineName; | |
if ( script == null || script.trim().isEmpty() ) | |
{ | |
throw new IllegalArgumentException( "Expected a non-empty script provided" ); | |
} | |
this.script = script; | |
} | |
/** | |
* @throws IllegalArgumentException | |
* @see org.apache.maven.plugins.scripting.Execute#constructEngine(javax.script.ScriptEngineManager) | |
*/ | |
protected ScriptEngine constructEngine( ScriptEngineManager manager ) throws IllegalArgumentException | |
{ | |
ScriptEngine result; | |
result = manager.getEngineByName( engineName ); | |
if ( result == null ) | |
{ | |
throw new IllegalArgumentException( "Unknown engine specified with name \"" + engineName + "\"" ); | |
} | |
return result; | |
} | |
/** | |
* @see org.apache.maven.plugins.scripting.Execute#execute(javax.script.ScriptEngine, javax.script.ScriptContext) | |
*/ | |
protected Object execute( ScriptEngine engine, ScriptContext context ) throws ScriptException | |
{ | |
return engine.eval( script, context ); | |
} | |
} |