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Java Source Code / Java Documentation » Byte Code » Javassist » javassist.bytecode

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

javassist.bytecode .ClassFile

ClassFile
final public class ClassFile (Code)
	`ClassFile` represents a Java `.class` file, which consists of a constant pool, methods, fields, and attributes. See Also: javassist.CtClass.getClassFile

Field Summary
int	accessFlags
LinkedList	attributes
String[]	cachedInterfaces
String	cachedSuperclass
ConstPool	constPool
ArrayList	fields
int[]	interfaces
int	majorminor
ArrayList	methods
int	superClass
int	thisClass
String	thisclassname

Constructor Summary
public	ClassFile(DataInputStream in) Constructs a class file from a byte stream.
public	ClassFile(boolean isInterface, String classname, String superclass) Constructs a class file including no members. Parameters: isInterface - true if this is an interface.

Method Summary
public void	addAttribute(AttributeInfo info) Appends an attribute.
public void	addField(FieldInfo finfo) Appends a field to the class.
public void	addInterface(String name) Appends an interface to the interfaces implemented by the class.
public void	addMethod(MethodInfo minfo) Appends a method to the class.
public void	compact() Eliminates dead constant pool items.
public int	getAccessFlags() Returns access flags.
public AttributeInfo	getAttribute(String name) Returns the attribute with the specified name.
public List	getAttributes() Returns all the attributes.
public ConstPool	getConstPool() Returns a constant pool table.
public List	getFields() Returns all the fields declared in the class.
public int	getInnerAccessFlags() Returns access and property flags of this nested class. This method returns -1 if the class is not a nested class.
public String[]	getInterfaces() Returns the names of the interfaces implemented by the class.
public int	getMajorVersion() Get the Major version.
public MethodInfo	getMethod(String name) Returns the method with the specified name.
public List	getMethods() Returns all the methods declared in the class.
public int	getMinorVersion() Get the minor version.
public String	getName() Returns the class name.
public String	getSourceFile() Returns the source file containing this class.
public MethodInfo	getStaticInitializer() Returns a static initializer (class initializer), or null if it does not exist.
public String	getSuperclass() Returns the super class name.
public int	getSuperclassId() Returns the index of the constant pool entry representing the super class.
public boolean	isAbstract() Returns true if this is an abstract class or an interface.
public boolean	isFinal() Returns true if this is a final class or interface.
public boolean	isInterface() Returns true if this is an interface.
public void	prune() Discards all attributes, associated with both the class file and the members such as a code attribute and exceptions attribute.
final public void	renameClass(String oldname, String newname) Replaces all occurrences of a class name in the class file. If class X is substituted for class Y in the class file, X and Y must have the same signature.
final public void	renameClass(Map classnames) Replaces all occurrences of several class names in the class file.
public void	setAccessFlags(int acc) Changes access flags.
public void	setInterfaces(String[] nameList) Sets the interfaces.
public void	setMajorVersion(int major) Set the major version.
public void	setMinorVersion(int minor) Set the minor version.
public void	setName(String name) Sets the class name.
public void	setSuperclass(String superclass) Sets the super class.
public void	setVersionToJava5() Sets the major and minor version to Java 5.
public void	write(DataOutputStream out) Writes a class file represened by this object into an output stream.

Field Detail

accessFlags
int accessFlags(Code)

attributes
LinkedList attributes(Code)

cachedInterfaces
String[] cachedInterfaces(Code)

cachedSuperclass
String cachedSuperclass(Code)

constPool
ConstPool constPool(Code)

fields
ArrayList fields(Code)

interfaces
int[] interfaces(Code)

majorminor
int majorminor(Code)

methods
ArrayList methods(Code)

superClass
int superClass(Code)

thisClass
int thisClass(Code)

thisclassname
String thisclassname(Code)

Constructor Detail

ClassFile
public ClassFile(DataInputStream in) throws IOException(Code)
	Constructs a class file from a byte stream.

ClassFile
public ClassFile(boolean isInterface, String classname, String superclass)(Code)
	Constructs a class file including no members. Parameters: isInterface - true if this is an interface. false if this is a class. Parameters: classname - a fully-qualified class name Parameters: superclass - a fully-qualified super class name

Method Detail

addAttribute
public void addAttribute(AttributeInfo info)(Code)
	Appends an attribute. If there is already an attribute with the same name, the new one substitutes for it. See Also: ClassFile.getAttributes()

addField
public void addField(FieldInfo finfo) throws DuplicateMemberException(Code)
	Appends a field to the class. throws: DuplicateMemberException - when the field is already included.

addInterface
public void addInterface(String name)(Code)
	Appends an interface to the interfaces implemented by the class.

addMethod
public void addMethod(MethodInfo minfo) throws DuplicateMemberException(Code)
	Appends a method to the class. throws: DuplicateMemberException - when the method is already included.

compact
public void compact()(Code)
	Eliminates dead constant pool items. If a method or a field is removed, the constant pool items used by that method/field become dead items. This method recreates a constant pool.

getAccessFlags
public int getAccessFlags()(Code)
	Returns access flags. See Also: javassist.bytecode.AccessFlag

getAttribute
public AttributeInfo getAttribute(String name)(Code)
	Returns the attribute with the specified name. If there are multiple attributes with that name, this method returns either of them. It returns null if the specified attributed is not found. Parameters: name - attribute name See Also: ClassFile.getAttributes()

getAttributes
public List getAttributes()(Code)
	Returns all the attributes. The returned `List` object is shared with this object. If you add a new attribute to the list, the attribute is also added to the classs file represented by this object. If you remove an attribute from the list, it is also removed from the class file. a list of `AttributeInfo` objects. See Also: AttributeInfo

getConstPool
public ConstPool getConstPool()(Code)
	Returns a constant pool table.

getFields
public List getFields()(Code)
	Returns all the fields declared in the class. a list of `FieldInfo`. See Also: FieldInfo

getInnerAccessFlags
public int getInnerAccessFlags()(Code)
	Returns access and property flags of this nested class. This method returns -1 if the class is not a nested class. The returned value is obtained from `inner_class_access_flags` of the entry representing this nested class itself in `InnerClasses_attribute`>.

getInterfaces
public String[] getInterfaces()(Code)
	Returns the names of the interfaces implemented by the class. The returned array is read only.

getMajorVersion
public int getMajorVersion()(Code)
	Get the Major version. the major version

getMethod
public MethodInfo getMethod(String name)(Code)
	Returns the method with the specified name. If there are multiple methods with that name, this method returns one of them. null if no such a method is found.

getMethods
public List getMethods()(Code)
	Returns all the methods declared in the class. a list of `MethodInfo`. See Also: MethodInfo

getMinorVersion
public int getMinorVersion()(Code)
	Get the minor version. the minor version

getName
public String getName()(Code)
	Returns the class name.

getSourceFile
public String getSourceFile()(Code)
	Returns the source file containing this class. null if this information is not available.

getStaticInitializer
public MethodInfo getStaticInitializer()(Code)
	Returns a static initializer (class initializer), or null if it does not exist.

getSuperclass
public String getSuperclass()(Code)
	Returns the super class name.

getSuperclassId
public int getSuperclassId()(Code)
	Returns the index of the constant pool entry representing the super class.

isAbstract
public boolean isAbstract()(Code)
	Returns true if this is an abstract class or an interface.

isFinal
public boolean isFinal()(Code)
	Returns true if this is a final class or interface.

isInterface
public boolean isInterface()(Code)
	Returns true if this is an interface.

prune
public void prune()(Code)
	Discards all attributes, associated with both the class file and the members such as a code attribute and exceptions attribute. The unused constant pool entries are also discarded (a new packed constant pool is constructed).

renameClass
final public void renameClass(String oldname, String newname)(Code)
	Replaces all occurrences of a class name in the class file. If class X is substituted for class Y in the class file, X and Y must have the same signature. If Y provides a method m(), X must provide it even if X inherits m() from the super class. If this fact is not guaranteed, the bytecode verifier may cause an error. Parameters: oldname - the replaced class name Parameters: newname - the substituted class name

renameClass
final public void renameClass(Map classnames)(Code)
	Replaces all occurrences of several class names in the class file. Parameters: classnames - specifies which class name is replaced with which new name.Class names must be described with the JVM-internalrepresentation like `java/lang/Object`. See Also: ClassFile.renameClass(String,String)

setAccessFlags
public void setAccessFlags(int acc)(Code)
	Changes access flags. See Also: javassist.bytecode.AccessFlag

setInterfaces
public void setInterfaces(String[] nameList)(Code)
	Sets the interfaces. Parameters: nameList - the names of the interfaces.

setMajorVersion
public void setMajorVersion(int major)(Code)
	Set the major version. Parameters: major - the major version

setMinorVersion
public void setMinorVersion(int minor)(Code)
	Set the minor version. Parameters: minor - the minor version

setName
public void setName(String name)(Code)
	Sets the class name. This method substitutes the new name for all occurrences of the old class name in the class file.

setSuperclass
public void setSuperclass(String superclass) throws CannotCompileException(Code)
	Sets the super class. This method modifies constructors so that they call constructors declared in the new super class.

setVersionToJava5
public void setVersionToJava5()(Code)
	Sets the major and minor version to Java 5. If the major version is older than 49, Java 5 extensions such as annotations are ignored by the JVM.

write
public void write(DataOutputStream out) throws IOException(Code)
	Writes a class file represened by this object into an output stream.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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