HtmlBuilderをmethodMissingで書き換えてみる。

HtmlBuilder.groovy

import groovy.xml.MarkupBuilder

class HtmlBuilder{
    
    BuilderSupport builder

    HtmlBuilder(BuilderSupport builder = new MarkupBuilder()){
        this.builder = builder
    }

    def fromString(String expr, var = [:]){
        def script = new GroovyShell(var as Binding).parse(expr)
        script.metaClass.methodMissing = { String name, args -> this.builder.invokeMethod(name, args) }
        script.run()
    }

    def fromFile(File file, var = [:]){
        fromString(file.text, var)
    }

    //********** getProperty() / setProperty() **********
    @Override
    def getProperty(String name){
        name == 'builder' ? this.builder : this.builder.getProperty(name)
    }

    @Override
    void setProperty(String name, value){
        name == 'builder' ? this.builder = value : this.builder.setProperty(name, value)
    }
}