Interface ClassBuilder
public interface ClassBuilder
ClassBuilder is used to construct a java class's byte array
representation.
Limitations:
No checking for language use violations such as invalid modifiers
or duplicate field names.
All classes must have a superclass; java.lang.Object must be
supplied if there is no superclass.
When a class is first created, it has:
- a superclass
- modifiers
- a name
- a package
- no superinterfaces, methods, fields, or constructors
- an empty static initializer
MethodBuilder implementations are required to get code out of the constructs within their bodies in some manner. Most typically, they may have a stream to which the statement and expression constructs write the code that they represent, and they walk over the statements and expressions in the appropriate order.
-
Method Summary
Modifier and TypeMethodDescriptionadd a field to this class.At the time the class is completed and bytecode generated, if there are no constructors then the default no-arg constructor will be defined.the class's qualified nameFully create the bytecode and load the class using the ClassBuilder's ClassFactory.getName()
the class's unqualified namenewConstructorBuilder
(int modifiers) a constructor.newMethodBuilder
(int modifiers, String returnType, String methodName) a method.newMethodBuilder
(int modifiers, String returnType, String methodName, String[] parms) a method with parameters.
-
Method Details
-
addField
add a field to this class. Fields cannot be initialized here, they must be initialized in the static initializer code (static fields) or in the constructors.Methods are added when they are created with the JavaFactory.
- Parameters:
type
- The type of the field in java language.name
- The name of the field.modifiers
- The | of the modifier values such as public, static, etc.- See Also:
-
getGeneratedClass
Fully create the bytecode and load the class using the ClassBuilder's ClassFactory.- Throws:
StandardException
- Standard Derby policy
-
getClassBytecode
At the time the class is completed and bytecode generated, if there are no constructors then the default no-arg constructor will be defined.- Throws:
StandardException
-
getName
String getName()the class's unqualified name -
getFullName
String getFullName()the class's qualified name -
newMethodBuilder
a method. Once it is created, parameters, thrown exceptions, statements, and local variable declarations must be added to it. It is put into its defining class when it is created.Java: #modifiers #returnType #methodName() {} // modifiers is the | of the JVM constants for // the modifiers such as static, public, etc. This is used to start a constructor as well; pass in null for the returnType when used in that manner.
- Parameters:
modifiers
- the | of the Modifier constants representing the visibility and control of this method.returnType
- the return type of the method as its Java language type name.methodName
- the name of the method.- Returns:
- the method builder.
- See Also:
-
newMethodBuilder
a method with parameters. Once it is created, thrown exceptions, statements, and local variable declarations must be added to it. It is put into its defining class when it is created.Java: #modifiers #returnType #methodName() {} // modifiers is the | of the JVM constants for // the modifiers such as static, public, etc. This is used to start a constructor as well; pass in null for the returnType when used in that manner.
- Parameters:
modifiers
- the | of the Modifier constants representing the visibility and control of this method.returnType
- the return type of the method as its Java language type name.methodName
- the name of the method.parms
- an array of String representing the method's parameter types- Returns:
- the method builder.
- See Also:
-
newConstructorBuilder
a constructor. Once it is created, parameters, thrown exceptions, statements, and local variable declarations must be added to it. It is put into its defining class when it is created.Java: #modifiers #className() {} // modifiers is the | of the JVM constants for // the modifiers such as static, public, etc. // className is taken from definingClass.name() This is used to start a constructor as well; pass in null for the returnType when used in that manner.
- Parameters:
modifiers
- the | of the Modifier constants representing the visibility and control of this method.- Returns:
- the method builder for the constructor.
- See Also:
-