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# Package com.google.gwt.core.ext.typeinfo

Type-introspection support classes used by generators. Developers implementing custom generators will use the classes in this package for introspection of the code being compiled.

## Classes

BadTypeArgsException | Thrown when an invalid type is specified as part of a `gwt.typeArgs` tag within a doc comment.
JAbstractMethod | Common superclass for JMethod and JConstructor.
JArrayType | Type representing a Java array.
JClassType | Type representing a Java class or interface type.
JConstructor | Represents a constructor declaration.
JField | Represents a field declaration.
JMethod | Represents a method declaration.
JPackage | Represents a logical package.
JParameter | Represents a parameter in a declaration.
JParameterizedType | Represents a parameterized type in a declaration.
JPrimitiveType | Represents a primitive type in a declaration.
JType | Abstract superclass for types.
NotFoundException | Indicates that the requested type info element could not be found.
ParseException | Indicates that a source declaration was not parsed successfully.
TypeOracle | Provides type-related information about a set of source files, including doc comment metadata.
TypeOracleException | The superclass of exceptions thrown by TypeOracle.

## Interfaces

CompilationUnitProvider | Provides information about a single compilation unit on demand.
HasMetaData | Manages doc comment metadata for an AST item.