public abstract class DelegatingScript extends Script
Script that performs method invocations and property access like Closure does.
DelegatingScript is a convenient basis for loading a custom-defined DSL as a Script, then execute it. The following sample code illustrates how to do it:
class MyDSL {
public void foo(int x, int y, Closure z) { ... }
public void setBar(String a) { ... }
}
CompilerConfiguration cc = new CompilerConfiguration();
cc.setScriptBaseClass(DelegatingScript.class.getName());
GroovyShell sh = new GroovyShell(cl,new Binding(),cc);
DelegatingScript script = (DelegatingScript)sh.parse(new File("my.dsl"))
script.setDelegate(new MyDSL());
script.run();
my.dsl can look like this:
foo(1,2) {
....
}
bar = ...;
DelegatingScript does this by delegating property access and method invocation to the delegate object.
More formally speaking, given the following script:
a = 1; b(2);
Using DelegatingScript as the base class, the code will run as:
delegate.a = 1; delegate.b(2);... whereas in plain Script, this will be run as:
binding.setProperty("a",1);
((Closure)binding.getProperty("b")).call(2);
| Constructor and description |
|---|
protected DelegatingScript
() |
protected DelegatingScript
(Binding binding) |
| Type Params | Return Type | Name and description |
|---|---|---|
|
public Object |
getDelegate() |
|
public Object |
getProperty(String property) |
|
public Object |
invokeMethod(String name, Object args) |
|
public void |
setDelegate(Object delegate)Sets the delegation target. |
|
public void |
setProperty(String property, Object newValue) |
| Methods inherited from class | Name |
|---|---|
class Script |
evaluate, evaluate, getBinding, getProperty, invokeMethod, print, printf, printf, println, println, run, run, setBinding, setProperty |
class GroovyObjectSupport |
getMetaClass, setMetaClass |
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