程序包 com.fastchar.asm.org.objectweb

Provides a small and fast bytecode manipulation framework.

请参阅: 说明

接口概要

接口	说明
Opcodes	The JVM opcodes, access flags and array type codes.

类概要

类	说明
AnnotationVisitor	A visitor to visit a Java annotation.
AnnotationWriter	An AnnotationVisitor that generates a corresponding 'annotation' or 'type_annotation' structure, as defined in the Java Virtual Machine Specification (JVMS).
Attribute	A non standard class, field, method or Code attribute, as defined in the Java Virtual Machine Specification (JVMS).
Attribute.Set	A set of attribute prototypes (attributes with the same type are considered equal).
ByteVector	A dynamically extensible vector of bytes.
ClassReader	A parser to make a ClassVisitor visit a ClassFile structure, as defined in the Java Virtual Machine Specification (JVMS).
ClassVisitor	A visitor to visit a Java class.
ClassWriter	A ClassVisitor that generates a corresponding ClassFile structure, as defined in the Java Virtual Machine Specification (JVMS).
ConstantDynamic	A constant whose value is computed at runtime, with a bootstrap method.
Constants	Defines additional JVM opcodes, access flags and constants which are not part of the ASM public API.
Context	Information about a class being parsed in a ClassReader.
CurrentFrame	Information about the input stack map frame at the "current" instruction of a method.
Edge	An edge in the control flow graph of a method.
FieldVisitor	A visitor to visit a Java field.
FieldWriter	A FieldVisitor that generates a corresponding 'field_info' structure, as defined in the Java Virtual Machine Specification (JVMS).
Frame	The input and output stack map frames of a basic block.
Handle	A reference to a field or a method.
Handler	Information about an exception handler.
Label	A position in the bytecode of a method.
MethodVisitor	A visitor to visit a Java method.
MethodWriter	A MethodVisitor that generates a corresponding 'method_info' structure, as defined in the Java Virtual Machine Specification (JVMS).
ModuleVisitor	A visitor to visit a Java module.
ModuleWriter	A ModuleVisitor that generates the corresponding Module, ModulePackages and ModuleMainClass attributes, as defined in the Java Virtual Machine Specification (JVMS).
RecordComponentVisitor	A visitor to visit a record component.
RecordComponentWriter
Symbol	An entry of the constant pool, of the BootstrapMethods attribute, or of the (ASM specific) type table of a class.
SymbolTable	The constant pool entries, the BootstrapMethods attribute entries and the (ASM specific) type table entries of a class.
SymbolTable.Entry	An entry of a SymbolTable.
Type	A Java field or method type.
TypePath	The path to a type argument, wildcard bound, array element type, or static inner type within an enclosing type.
TypeReference	A reference to a type appearing in a class, field or method declaration, or on an instruction.

异常错误概要

异常错误	说明
ClassTooLargeException	Exception thrown when the constant pool of a class produced by a ClassWriter is too large.
MethodTooLargeException	Exception thrown when the Code attribute of a method produced by a ClassWriter is too large.

程序包com.fastchar.asm.org.objectweb的说明

Provides a small and fast bytecode manipulation framework.

The ASM framework is organized around the ClassVisitor, FieldVisitor, MethodVisitor and AnnotationVisitor abstract classes, which allow one to visit the fields, methods and annotations of a class, including the bytecode instructions of each method.

In addition to these main abstract classes, ASM provides a ClassReader class, that can parse an existing class and make a given visitor visit it. ASM also provides a ClassWriter class, which is a visitor that generates Java class files.

In order to generate a class from scratch, only the ClassWriter class is necessary. Indeed, in order to generate a class, one must just call its visitXxx methods with the appropriate arguments to generate the desired fields and methods.

In order to modify existing classes, one must use a ClassReader class to analyze the original class, a class modifier, and a ClassWriter to construct the modified class. The class modifier is just a ClassVisitor that delegates most of the work to another ClassVisitor, but that sometimes changes some parameter values, or call additional methods, in order to implement the desired modification process. In order to make it easier to implement such class modifiers, the ClassVisitor and MethodVisitor classes delegate by default all the method calls they receive to an optional visitor.

从以下版本开始:

ASM 1.3