Package org.codehaus.groovy.runtime.metaclass

Class ClosureMetaClass

java.lang.Object
groovy.lang.MetaClassImpl
org.codehaus.groovy.runtime.metaclass.ClosureMetaClass
All Implemented Interfaces:
MetaClass, MetaObjectProtocol, MutableMetaClass
public final class ClosureMetaClass
extends MetaClassImpl
A meta class for closures generated by the Groovy compiler. These classes have special characteristics this MetaClass uses. One of these is that a generated Closure has only additional doCall methods, all other methods are in the Closure class as well. To use this fact this MetaClass uses a MetaClass for Closure as static field And delegates calls to this MetaClass if needed. This allows a lean implementation for this MetaClass. Multiple generated closures will then use the same MetaClass for Closure. For static dispatching this class uses the MetaClass of Class, again all instances of this class will share that MetaClass. The Class MetaClass is initialized lazy, because most operations do not need this MetaClass.

The Closure and Class MetaClasses are not replaceable.

This MetaClass is for internal usage only!

Since:
1.5

  • Constructor Details

    • ClosureMetaClass

      public ClosureMetaClass​(MetaClassRegistry registry, java.lang.Class theClass)

  • Method Details

    • resetCachedMetaClasses

      public static void resetCachedMetaClasses()

    • getMetaProperty

      public MetaProperty getMetaProperty​(java.lang.String name)
      Description copied from interface: MetaObjectProtocol
      Returns a MetaProperty for the given name or null if it doesn't exist
      Specified by:
      getMetaProperty in interface MetaObjectProtocol
      Overrides:
      getMetaProperty in class MetaClassImpl
      Parameters:
      name - The name of the MetaProperty
      Returns:
      A MetaProperty or null
      See Also:
      MetaObjectProtocol.getMetaProperty(String)

    • invokeMethod

      public java.lang.Object invokeMethod​(java.lang.Class sender, java.lang.Object object, java.lang.String methodName, java.lang.Object[] originalArguments, boolean isCallToSuper, boolean fromInsideClass)
      Description copied from class: MetaClassImpl

      Invokes a method on the given receiver for the specified arguments. The sender is the class that invoked the method on the object. The MetaClass will attempt to establish the method to invoke based on the name and arguments provided.

      The isCallToSuper and fromInsideClass help the Groovy runtime perform optimisations on the call to go directly to the super class if necessary

      Specified by:
      invokeMethod in interface MetaClass
      Overrides:
      invokeMethod in class MetaClassImpl
      Parameters:
      sender - The java.lang.Class instance that invoked the method
      object - The object which the method was invoked on
      methodName - The name of the method
      originalArguments - The arguments to the method
      isCallToSuper - Whether the method is a call to a super class method
      fromInsideClass - Whether the call was invoked from the inside or the outside of the class
      Returns:
      The return value of the method
      See Also:
      MetaClass.invokeMethod(Class, Object, String, Object[], boolean, boolean)

    • initialize

      public void initialize()
      Description copied from class: MetaClassImpl
      Complete the initialisation process. After this method is called no methods should be added to the meta class. Invocation of methods or access to fields/properties is forbidden unless this method is called. This method should contain any initialisation code, taking a longer time to complete. An example is the creation of the Reflector. It is suggested to synchronize this method.
      Specified by:
      initialize in interface MetaClass
      Overrides:
      initialize in class MetaClassImpl

    • getMethods

      public java.util.List<MetaMethod> getMethods()
      Description copied from class: MetaClassImpl
      Retrieves the list of MetaMethods held by the class. This list does not include MetaMethods added by groovy.lang.ExpandoMetaClass.
      Specified by:
      getMethods in interface MetaClass
      Specified by:
      getMethods in interface MetaObjectProtocol
      Overrides:
      getMethods in class MetaClassImpl
      Returns:
      A list of MetaMethods
      See Also:
      MetaMethod

    • getMetaMethods

      public java.util.List<MetaMethod> getMetaMethods()
      Description copied from class: MetaClassImpl
      Retrieves the list of MetaMethods held by this class. This list includes MetaMethods added by groovy.lang.ExpandoMetaClass.
      Specified by:
      getMetaMethods in interface MetaClass
      Overrides:
      getMetaMethods in class MetaClassImpl
      Returns:
      A list of MetaMethods

    • getProperties

      public java.util.List<MetaProperty> getProperties()
      Description copied from class: MetaClassImpl
      Get all the properties defined for this type
      Specified by:
      getProperties in interface MetaClass
      Specified by:
      getProperties in interface MetaObjectProtocol
      Overrides:
      getProperties in class MetaClassImpl
      Returns:
      a list of MetaProperty objects
      See Also:
      MetaProperty

    • pickMethod

      public MetaMethod pickMethod​(java.lang.String name, java.lang.Class[] argTypes)
      Description copied from class: MetaClassImpl
      Selects a method by name and argument classes. This method does not search for an exact match, it searches for a compatible method. For this the method selection mechanism is used as provided by the implementation of this MetaClass. pickMethod may or may not be used during the method selection process when invoking a method. There is no warranty for that.
      Specified by:
      pickMethod in interface MetaClass
      Overrides:
      pickMethod in class MetaClassImpl
      Parameters:
      name - the name of the method to pick
      argTypes - the method arguments
      Returns:
      a matching MetaMethod or null

    • retrieveStaticMethod

      public MetaMethod retrieveStaticMethod​(java.lang.String methodName, java.lang.Class[] arguments)

    • isInitialized

      protected boolean isInitialized()
      Overrides:
      isInitialized in class MetaClassImpl

    • setInitialized

      protected void setInitialized​(boolean initialized)
      Overrides:
      setInitialized in class MetaClassImpl

    • getStaticMetaMethod

      public MetaMethod getStaticMetaMethod​(java.lang.String name, java.lang.Object[] args)
      Description copied from interface: MetaObjectProtocol
      Retrieves a static MetaMethod for the given name and argument values, using the types of the arguments to establish the chosen MetaMethod
      Specified by:
      getStaticMetaMethod in interface MetaObjectProtocol
      Overrides:
      getStaticMetaMethod in class MetaClassImpl
      Parameters:
      name - The name of the MetaMethod
      args - The argument types
      Returns:
      A MetaMethod or null if it doesn't exist
      See Also:
      MetaObjectProtocol.getStaticMetaMethod(String, Object[])

    • getStaticMetaMethod

      public MetaMethod getStaticMetaMethod​(java.lang.String name, java.lang.Class[] argTypes)

    • getProperty

      public java.lang.Object getProperty​(java.lang.Class sender, java.lang.Object object, java.lang.String name, boolean useSuper, boolean fromInsideClass)
      Description copied from interface: MetaClass

      Retrieves a property on the given receiver for the specified arguments. The sender is the class that is requesting the property from the object. The MetaClass will attempt to establish the method to invoke based on the name and arguments provided.

      The isCallToSuper and fromInsideClass help the Groovy runtime perform optimisations on the call to go directly to the super class if necessary

      Specified by:
      getProperty in interface MetaClass
      Overrides:
      getProperty in class MetaClassImpl
      Parameters:
      sender - The java.lang.Class instance that requested the property
      object - The Object which the property is being retrieved from
      name - The name of the property
      useSuper - Whether the call is to a super class property
      fromInsideClass - ??
      Returns:
      the given property's value on the object

    • getAttribute

      public java.lang.Object getAttribute​(java.lang.Class sender, java.lang.Object object, java.lang.String attribute, boolean useSuper, boolean fromInsideClass)
      Description copied from class: MetaClassImpl
      Retrieves the value of an attribute (field). This method is to support the Groovy runtime and not for general client API usage.
      Overrides:
      getAttribute in class MetaClassImpl
      Parameters:
      sender - The class of the object that requested the attribute
      object - The instance the attribute is to be retrieved from
      attribute - The name of the attribute
      useSuper - Whether to look-up on the super class or not
      fromInsideClass - Whether the call was invoked from the inside or the outside of the class.
      Returns:
      The attribute value

    • setAttribute

      public void setAttribute​(java.lang.Class sender, java.lang.Object object, java.lang.String attribute, java.lang.Object newValue, boolean useSuper, boolean fromInsideClass)
      Description copied from class: MetaClassImpl

      Sets an attribute on the given receiver for the specified arguments. The sender is the class that is setting the attribute from the object. The MetaClass will attempt to establish the method to invoke based on the name and arguments provided.

      The isCallToSuper and fromInsideClass help the Groovy runtime perform optimisations on the call to go directly to the super class if necessary

      Specified by:
      setAttribute in interface MetaClass
      Overrides:
      setAttribute in class MetaClassImpl
      Parameters:
      sender - The java.lang.Class instance that is mutating the property
      object - The Object which the property is being set on
      attribute - The name of the attribute,
      newValue - The new value of the attribute to set
      useSuper - Whether the call is to a super class property
      fromInsideClass - Whether the call was invoked from the inside or the outside of the class

    • invokeStaticMethod

      public java.lang.Object invokeStaticMethod​(java.lang.Object object, java.lang.String methodName, java.lang.Object[] arguments)
      Description copied from interface: MetaObjectProtocol
      Invokes a static method on the given Object with the given name and arguments.

      The Object can either be an instance of the class that this MetaObjectProtocol instance applies to or the java.lang.Class instance itself. If a method cannot be invoked a MissingMethodException is will be thrown

      Specified by:
      invokeStaticMethod in interface MetaObjectProtocol
      Overrides:
      invokeStaticMethod in class MetaClassImpl
      Parameters:
      object - An instance of the class returned by the getTheClass() method or the class itself
      methodName - The name of the method
      arguments - The arguments to the method
      Returns:
      The return value of the method which is null if the return type is void
      See Also:
      MissingMethodException

    • setProperty

      public void setProperty​(java.lang.Class sender, java.lang.Object object, java.lang.String name, java.lang.Object newValue, boolean useSuper, boolean fromInsideClass)
      Description copied from class: MetaClassImpl

      Retrieves a property on the given receiver for the specified arguments. The sender is the class that is requesting the property from the object. The MetaClass will attempt to establish the method to invoke based on the name and arguments provided.

      The useSuper and fromInsideClass help the Groovy runtime perform optimisations on the call to go directly to the super class if necessary

      Specified by:
      setProperty in interface MetaClass
      Overrides:
      setProperty in class MetaClassImpl
      Parameters:
      sender - The java.lang.Class instance that is mutating the property
      object - The Object which the property is being set on
      name - The name of the property
      newValue - The new value of the property to set
      useSuper - Whether the call is to a super class property
      fromInsideClass - Whether the call was invoked from the inside or the outside of the class.

    • getMethodWithoutCaching

      public MetaMethod getMethodWithoutCaching​(int index, java.lang.Class sender, java.lang.String methodName, java.lang.Class[] arguments, boolean isCallToSuper)

    • setProperties

      public void setProperties​(java.lang.Object bean, java.util.Map map)
      Description copied from class: MetaClassImpl
      Sets a number of bean properties from the given Map where the keys are the String names of properties and the values are the values of the properties to set
      Overrides:
      setProperties in class MetaClassImpl

    • addMetaBeanProperty

      public void addMetaBeanProperty​(MetaBeanProperty mp)
      Description copied from class: MetaClassImpl
      Adds a new MetaBeanProperty to this MetaClass
      Specified by:
      addMetaBeanProperty in interface MutableMetaClass
      Overrides:
      addMetaBeanProperty in class MetaClassImpl
      Parameters:
      mp - The MetaBeanProperty

    • addMetaMethod

      public void addMetaMethod​(MetaMethod method)
      Description copied from class: MetaClassImpl
      adds a MetaMethod to this class. WARNING: this method will not do the neccessary steps for multimethod logic and using this method doesn't mean, that a method added here is replacing another method from a parent class completely. These steps are usually done by initialize, which means if you need these steps, you have to add the method before running initialize the first time.
      Specified by:
      addMetaMethod in interface MutableMetaClass
      Overrides:
      addMetaMethod in class MetaClassImpl
      Parameters:
      method - the MetaMethod
      See Also:
      MetaClassImpl.initialize()

    • addNewInstanceMethod

      public void addNewInstanceMethod​(java.lang.reflect.Method method)
      Description copied from class: MetaClassImpl
      Adds an instance method to this metaclass.
      Specified by:
      addNewInstanceMethod in interface MutableMetaClass
      Overrides:
      addNewInstanceMethod in class MetaClassImpl
      Parameters:
      method - The method to be added

    • addNewStaticMethod

      public void addNewStaticMethod​(java.lang.reflect.Method method)
      Description copied from class: MetaClassImpl
      Adds a static method to this metaclass.
      Specified by:
      addNewStaticMethod in interface MutableMetaClass
      Overrides:
      addNewStaticMethod in class MetaClassImpl
      Parameters:
      method - The method to be added

    • retrieveConstructor

      public java.lang.reflect.Constructor retrieveConstructor​(java.lang.Class[] arguments)
      Overrides:
      retrieveConstructor in class MetaClassImpl

    • createPojoCallSite

      public CallSite createPojoCallSite​(CallSite site, java.lang.Object receiver, java.lang.Object[] args)
      Description copied from class: MetaClassImpl
      Create a CallSite
      Overrides:
      createPojoCallSite in class MetaClassImpl

    • createPogoCallSite

      public CallSite createPogoCallSite​(CallSite site, java.lang.Object[] args)
      Description copied from class: MetaClassImpl
      Create a CallSite
      Overrides:
      createPogoCallSite in class MetaClassImpl

    • createPogoCallCurrentSite

      public CallSite createPogoCallCurrentSite​(CallSite site, java.lang.Class sender, java.lang.Object[] args)
      Description copied from class: MetaClassImpl
      Create a CallSite
      Overrides:
      createPogoCallCurrentSite in class MetaClassImpl

    • respondsTo

      public java.util.List respondsTo​(java.lang.Object obj, java.lang.String name, java.lang.Object[] argTypes)
      Description copied from interface: MetaObjectProtocol

      Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name and arguments types.

      Note that this method's return value is based on realised methods and does not take into account objects or classes that implement invokeMethod or methodMissing

      This method is "safe" in that it will always return a value and never throw an exception

      Specified by:
      respondsTo in interface MetaObjectProtocol
      Overrides:
      respondsTo in class MetaClassImpl
      Parameters:
      obj - The object to inspect
      name - The name of the method of interest
      argTypes - The argument types to match against
      Returns:
      A List of MetaMethods matching the argument types which will be empty if no matching methods exist
      See Also:
      MetaObjectProtocol.respondsTo(Object, String, Object[])

    • respondsTo

      public java.util.List respondsTo​(java.lang.Object obj, java.lang.String name)
      Description copied from interface: MetaObjectProtocol

      Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name regardless of arguments. In other words this method will return for foo() and foo(String).

      Note that this method's return value is based on realised methods and does not take into account objects or classes that implement invokeMethod or methodMissing

      This method is "safe" in that it will always return a value and never throw an exception

      Specified by:
      respondsTo in interface MetaObjectProtocol
      Overrides:
      respondsTo in class MetaClassImpl
      Parameters:
      obj - The object to inspect
      name - The name of the method of interest
      Returns:
      A List of MetaMethods which will be empty if no methods with the given name exist
      See Also:
      MetaObjectProtocol.respondsTo(Object, String)

    • applyPropertyDescriptors

      protected void applyPropertyDescriptors​(java.beans.PropertyDescriptor[] propertyDescriptors)
      Overrides:
      applyPropertyDescriptors in class MetaClassImpl