| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * Licensed 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 groovy.util; |
| |
| import org.codehaus.groovy.control.CompilationFailedException; |
| |
| import groovy.lang.Binding; |
| import groovy.lang.GroovyShell; |
| |
| /** |
| * Allow easy integration from Groovy into Java through convenience methods. |
| * |
| * @author Dierk Koenig |
| */ |
| |
| public class Eval { |
| /** |
| * @param expression the Groovy expression to evaluate |
| * @return the result of the expression |
| * @throws CompilationFailedException if expression is no proper Groovy |
| */ |
| public static Object me(final String expression) throws CompilationFailedException { |
| return me(null, null, expression); |
| } |
| |
| /** |
| * evaluate expression and make object available inside the expression as 'symbol' |
| * @param expression the Groovy expression to evaluate |
| * @return the result of the expression |
| * @throws CompilationFailedException if expression is no proper Groovy |
| */ |
| public static Object me(final String symbol, final Object object, final String expression) throws CompilationFailedException { |
| Binding b = new Binding(); |
| b.setVariable(symbol, object); |
| GroovyShell sh = new GroovyShell(b); |
| return sh.evaluate(expression); |
| } |
| |
| /** |
| * evaluate expression and make x available inside the expression as 'x' |
| * @param expression the Groovy expression to evaluate |
| * @return the result of the expression |
| * @throws CompilationFailedException if expression is no proper Groovy |
| */ |
| public static Object x(final Object x, final String expression) throws CompilationFailedException { |
| return me("x", x, expression); |
| } |
| |
| /** |
| * evaluate expression and make x and y available inside the expression as 'x' and 'y' |
| * @param expression the Groovy expression to evaluate |
| * @return the result of the expression |
| * @throws CompilationFailedException if expression is no proper Groovy |
| */ |
| public static Object xy(final Object x, final Object y, final String expression) throws CompilationFailedException { |
| Binding b = new Binding(); |
| b.setVariable("x", x); |
| b.setVariable("y", y); |
| GroovyShell sh = new GroovyShell(b); |
| return sh.evaluate(expression); |
| } |
| |
| /** |
| * evaluate expression and make x,y,z available inside the expression as 'x','y','z' |
| * @param expression the Groovy expression to evaluate |
| * @return the result of the expression |
| * @throws CompilationFailedException if expression is no proper Groovy |
| */ |
| public static Object xyz(final Object x, final Object y, final Object z, final String expression) throws CompilationFailedException { |
| Binding b = new Binding(); |
| b.setVariable("x", x); |
| b.setVariable("y", y); |
| b.setVariable("z", z); |
| GroovyShell sh = new GroovyShell(b); |
| return sh.evaluate(expression); |
| } |
| } |