| 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. |
| * @see EvalTest |
| * @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); |
| } |
| } |