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Groovy Documentation | |||||||
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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectgroovy.lang.GroovyObjectSupport
groovy.lang.Script
groovy.util.DelegatingScript
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); 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 Summary | |
protected DelegatingScript()
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protected DelegatingScript(Binding binding)
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Method Summary | |
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java.lang.Object
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getDelegate()
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java.lang.Object
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getProperty(java.lang.String property)
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java.lang.Object
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invokeMethod(java.lang.String name, java.lang.Object args)
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void
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setDelegate(java.lang.Object delegate)
Sets the delegation target. |
void
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setProperty(java.lang.String property, java.lang.Object newValue)
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Methods inherited from class Script | |
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evaluate, evaluate, getBinding, getProperty, invokeMethod, print, printf, printf, println, println, run, run, setBinding, setProperty |
Methods inherited from class GroovyObjectSupport | |
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getMetaClass, getProperty, invokeMethod, setMetaClass, setProperty |
Methods inherited from class java.lang.Object | |
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java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll() |
Constructor Detail |
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protected DelegatingScript()
protected DelegatingScript(Binding binding)
Method Detail |
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public java.lang.Object getDelegate()
@java.lang.Override public java.lang.Object getProperty(java.lang.String property)
@java.lang.Override public java.lang.Object invokeMethod(java.lang.String name, java.lang.Object args)
public void setDelegate(java.lang.Object delegate)
@java.lang.Override public void setProperty(java.lang.String property, java.lang.Object newValue)
Groovy Documentation