GroovyShell的初始化過程

GroovyShell的初始化

    public GroovyShell(CompilerConfiguration config) {
        this(new Binding(), config);
    }
	
	class Binding is subclass of GroovyObjectSupport

	public GroovyObjectSupport() {
        this.metaClass = InvokerHelper.getMetaClass(this.getClass());
    }
	
	while the InvokerHelper has static members 
	
	public static final MetaClassRegistry metaRegistry = GroovySystem.getMetaClassRegistry();
	
	So the GroovySystem will be loaded, and its static members
	
	static {
        USE_REFLECTION = true;
        META_CLASS_REGISTRY = new MetaClassRegistryImpl();
    }
	
	public MetaClassRegistryImpl() {
        this(LOAD_DEFAULT, true);
    }
	
	it will call MetaClassRegistryImpl.registerMethods,  
	－> GeneratedMetaMethod.DgmMethodRecord.loadDgmInfo();
	the function will analysis groovy-2.4.0.jar$META-INF/dgminfo
	這是一個二進制流的文件，她定義了很多基本的函數的參數個數，類型，返回值的類型等等
	這個函數最後返回一個列表，記錄了所歐的基本函數
	
	registerMethods(null, true, true, map);返回後， map是一個CachedClass爲key （如java.util.Calendar）
		list<MetaMethod>  爲value的map 如[org.codehaus.groovy.reflection.GeneratedMetaMethod$Proxy@a5852[name: clearTime params: [] returns: class java.util.Calendar owner: class java.util.Calendar],..]
		
	接着和DefaultGroovyMethods.additionals 合併， 不斷填充map
	接着和class org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods 合併 （所有函數爲 [
	public static java.lang.StringBuilder org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.leftShift(java.lang.StringBuilder,java.lang.Object), public static java.lang.Object org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.next(java.lang.Enum), 
	public static java.lang.String org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.plus(java.lang.StringBuilder,java.lang.String), public static java.lang.Object org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.previous(java.lang.Enum), 
	public static void org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.putAt(java.lang.StringBuilder,groovy.lang.EmptyRange,java.lang.Object), public static void org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.putAt(java.lang.StringBuilder,groovy.lang.IntRange,java.lang.Object), public static int org.codehaus.groovy.vmplugin.v5.PluginDefaultGroovyMethods.size(java.lang.StringBuilder)]）
	
	注意leftShift
	
	接着DefaultGroovyStaticMethods
	接着     ExtensionModuleScanner scanner = new ExtensionModuleScanner(new DefaultModuleListener(map), this.getClass().getClassLoader());
            scanner.scanClasspathModules();
			從所有META-INF/services/org.codehaus.groovy.runtime.ExtensionModule 中找出properties， 
			處理   －－－－－－－－－具體略以後分析
			從 groovy-jsr223-<version>.jar中，找出
			[public static java.lang.Object org.codehaus.groovy.jsr223.ScriptExtensions.eval(javax.script.ScriptEngine,java.io.Reader,groovy.lang.Binding) throws javax.script.ScriptException, public static java.lang.Object org.codehaus.groovy.jsr223.ScriptExtensions.eval(javax.script.ScriptEngine,java.lang.String,groovy.lang.Binding) throws javax.script.ScriptException, public static javax.script.ScriptEngine org.codehaus.groovy.jsr223.ScriptStaticExtensions.$static_propertyMissing(javax.script.ScriptEngineManager,java.lang.String)]
	
	以上過程也在同時不斷寫MetaClassRegistryImpl類的
	private FastArray instanceMethods = new FastArray();
    private FastArray staticMethods = new FastArray();