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## Package groovy.lang

Core Groovy language classes for implementing data structures, closures, metadata and so forth.

Interface Summary
AdaptingMetaClass | An interface for MetaClass instances that "adapt" other MetaClass instances such as a proxy or delegating MetaClass.
Buildable |
ClosureInvokingMethod | An interface for MetaMethods that invoke closures to implements.
GroovyInterceptable | Marker interface used to notify that all methods should be intercepted through the `invokeMethod` mechanism of `GroovyObject`.
GroovyObject | The interface implemented by all Groovy objects.
GroovyResourceLoader | Allows frameworks that integrate with Groovy to determine how Groovy files are resolved.
Interceptor | Implementers of this interface can be registered in the ProxyMetaClass for notifications about method calls for objects managed by the ProxyMetaClass.
MetaClass | A MetaClass within Groovy defines the behaviour of any given Groovy or Java class.
MetaClassRegistry | A MetaClassRegistry is an object that is responsible for managing the a cache of MetaClass instances.
MetaClassRegistryChangeEventListener | A listener called whenever a constant MetaClass is set, removed or replaced.
MetaObjectProtocol | An interface that defines the API usable by clients of Groovy's Meta Object Protocol (MOP).
MutableMetaClass | An interface that defines methods that implementers of mutable Meta classes should specify.
PropertyAccessInterceptor | An interface that adds the ability to intercept property getters/setters
Range | A Range represents the list of all items obtained by starting from a `from` value and calling `next()` successively until you reach the `to` value.
Writable | Represents an object which is capable of writing itself to a text stream in a more efficient format than just creating a toString() representation of itself.

Class Summary
BenchmarkInterceptor | Interceptor that registers the timestamp of each method call before and after invocation.
Binding | Represents the variable bindings of a script which can be altered from outside the script object or created outside of a script and passed into it.
Closure | Represents any closure object in Groovy.
DelegatingMetaClass | @author John Wilson
EmptyRange | Constructing Ranges like 0..<0
ExpandoMetaClass | ExpandoMetaClass is a MetaClass that behaves like an Expando, allowing the addition or replacement of methods, properties and constructors on the fly.
ExpandoMetaClass.ExpandoMetaConstructor | Handles the ability to use the left shift operator to append new constructors
ExpandoMetaClass.ExpandoMetaProperty | Instances of this class are returned when using the << left shift operator.
ExpandoMetaClassCreationHandle | A handle for the MetaClassRegistry that changes all classes loaded into the Grails VM to use ExpandoMetaClass instances
GString | Represents a String which contains embedded values such as "hello there ${user} how are you?"
GroovyClassLoader | A ClassLoader which can load Groovy classes.
GroovyClassLoader.ClassCollector |
GroovyClassLoader.InnerLoader |
GroovyCodeSource | CodeSource wrapper class that allows specific security policies to be associated with a class compiled from groovy source.
GroovyLogTestCase | Helper class to spoof log entries as produced by calling arbitrary code.
GroovyObjectSupport | A useful base class for Java objects wishing to be Groovy objects
GroovyShell | Represents a groovy shell capable of running arbitrary groovy scripts
GroovySystem |
IntRange | Represents a list of Integer objects from a specified int up (or down) to and including a given to.
MapWithDefault | A wrapper for Map which allows a default value to be specified.
MetaArrayLengthProperty | Represents a property on a bean which may have a getter and/or a setter
MetaBeanProperty | Represents a property on a bean which may have a getter and/or a setter
MetaClassImpl | Allows methods to be dynamically added to existing classes at runtime
MetaClassImpl.Index |
MetaClassRegistry.MetaClassCreationHandle | Class used as base for the creation of MetaClass implementations.
MetaClassRegistryChangeEvent | An event used to propagate meta class updates
MetaExpandoProperty | Represents a property in an Expando object
MetaMethod | Represents a Method on a Java object a little like Method except without using reflection to invoke the method
MetaProperty | Represents a property on a bean which may have a getter and/or a setter
NonEmptySequence | Represents a sequence of objects which represents one or many instances of of objects of a given type.
ObjectRange | Represents an inclusive list of objects from a value to a value using comparators.
ParameterArray | Distinguish a parameter array from Object[].
PropertyValue |
ProxyMetaClass | As subclass of MetaClass, ProxyMetaClass manages calls from Groovy Objects to POJOs.
Reference | Represents a reference to a value
Script | This object represents a Groovy script
Sequence | Represents a sequence of objects which represents zero or many instances of of objects of a given type.
SpreadMap | Represents a spreadable map which extends java.util.HashMap.
TracingInterceptor |
Tuple | Represents a list of Integer objects from a specified int up to but not including a given and to.

Exception Summary
ClosureException | An exception thrown by a closure invocation
DeprecationException | Use this exception to mark a method implementation as being deprecated.
GroovyRuntimeException | An exception thrown by the interpreter
IllegalPropertyAccessException | An exception occurred if a dynamic property dispatch fails with a field not accessible.
IncorrectClosureArgumentsException | An exception occurred when invoking a Closure with the wrong number and/or types of arguments
MissingClassException | An exception occurred if a dynamic method dispatch fails with an unknown class.
MissingFieldException | An exception occurred if a dynamic field dispatch fails with an unknown field.
MissingMethodException | An exception occurred if a dynamic method dispatch fails with an unknown method.
MissingPropertyException | An exception occurred if a dynamic property dispatch fails with an unknown property.
ReadOnlyPropertyException | This exception is thrown if an attempt is made to set a read only property
SpreadListEvaluatingException |
SpreadMapEvaluatingException |
StringWriterIOException | An IO exception occurred trying to append to a StringWriter which should never happen.

Annotation Type Summary
Category | Transforms an instance-style Groovy class or interface to become a static-style conventional Groovy category.
Delegate | Field annotation to automatically delegate part of the functionality of an owner class to the annotated field.
Grab | Used to grab the referenced artifact and its dependencies and make it available on the Classpath.
GrabConfig | Use within a `@Grapes` annotation to modify grab configuration.
GrabExclude | Used to exclude the indirectly referenced artifact from the classpath.
GrabResolver | Used to add a repository for resolving Grape dependencies For example:
     @GrabResolver(name='restlet.org', root='http://maven.restlet.org')
     @Grab(group='org.restlet', module='org.restlet', version='1.1.6')
     class MyRestlet extends org.restlet.Restlet {
       // ...
     }
Grapes | Sometimes we will need more than one grab per class, but we can only add one annotation type per annotatable node.
Immutable | Class annotation used to assist in the creation of immutable classes.
Lazy | Field annotation to simplify lazy initialization.
Mixin | Provides a mechanism for mixing in methods into a class.
Newify | Annotation that supports writing constructor call expressions without the 'new' keyword.
PackageScope | Class or field annotation used for turning off Groovy's auto property conversion of default or package scoped fields.
Singleton | Class annotation to make class singleton.

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