Eclipse JDT Plug-in Developer Guide (Galileo) - IClassFileReader (Eclipse JDT API Specification)

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Eclipse JDT
Release 3.5

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org.eclipse.jdt.core.util
Interface IClassFileReader

public interface IClassFileReader

Description of a .class file. This class reifies the internal structure of a .class file following the JVM specifications.

Note that several changes were introduced with J2SE 1.5. Class file reader implementations should use support these new class file attributes by returning objects implementing the appropriate specialized attribute interfaces. Class file reader clients can search for these new attributes and downcast to the new interfaces as appropriate.

This interface may be implemented by clients.

Since:: 2.0

Field Summary

static int ALL
          This value should be used to read completely each part of a .class file.

static int ALL_BUT_METHOD_BODIES
          This value should be used to read the whole contents of the .class file except the method bodies.

static int CLASSFILE_ATTRIBUTES
          This value should be used to read the constant pool entries and the attributes of a .class file.

static int CONSTANT_POOL
          This value should be used to read only the constant pool entries of a .class file.

static int FIELD_INFOS
          This value should be used to read the constant pool entries and the field infos of a .class file.

static int METHOD_BODIES
          This value should be used to read the method bodies.

static int METHOD_INFOS
          This value should be used to read the constant pool entries and the method infos of a .class file.

static int SUPER_INTERFACES
          This value should be used to read the constant pool entries and the super interface names of a .class file.

Method Summary

int getAccessFlags ()
          Answer back the access flag of the .class file.

int getAttributeCount ()
          Answer back the attribute number of the .class file.

IClassFileAttribute[] getAttributes ()
          Answer back the collection of all attributes of the field info.

int getClassIndex ()
          Answer back the index of the class name in the constant pool of the .class file.

char[] getClassName ()
          Answer back the qualified name of the .class file.

IConstantPool getConstantPool ()
          Answer the constant pool of this .class file.

IFieldInfo[] getFieldInfos ()
          Answer back the array of field infos of the .class file, an empty array if none.

int getFieldsCount ()
          Answer back the number of field infos.

IInnerClassesAttribute getInnerClassesAttribute ()
          Answer back the inner classes attribute of this .class file, null if none.

int[] getInterfaceIndexes ()
          Answer back the indexes in the constant pool of interfaces implemented by this .class file, an empty array if none.

char[][] getInterfaceNames ()
          Answer back the names of interfaces implemented by this .class file, an empty array if none.

int getMagic ()
          Answer back the magic number.

int getMajorVersion ()
          Answer the major version of this .class file.

IMethodInfo[] getMethodInfos ()
          Answer back the array of method infos of this .class file, an empty array if none.

int getMethodsCount ()
          Answer back the number of method infos.

int getMinorVersion ()
          Answer the minor version of this .class file.

ISourceAttribute getSourceFileAttribute ()
          Answer the source file attribute, if it exists, null otherwise.

int getSuperclassIndex ()
          Answer back the index of the superclass name in the constant pool of the .class file.

char[] getSuperclassName ()
          Answer back the qualified name of the superclass of this .class file.

boolean isClass ()
          Answer true if this .class file represents an class, false otherwise.

boolean isInterface ()
          Answer true if this .class file represents an interface, false otherwise.

Field Detail

ALL

static final int ALL

This value should be used to read completely each part of a .class file.

See Also:: Constant Field Values

CONSTANT_POOL

static final int CONSTANT_POOL

This value should be used to read only the constant pool entries of a .class file.

See Also:: Constant Field Values

METHOD_INFOS

static final int METHOD_INFOS

This value should be used to read the constant pool entries and the method infos of a .class file.

See Also:: Constant Field Values

FIELD_INFOS

static final int FIELD_INFOS

This value should be used to read the constant pool entries and the field infos of a .class file.

See Also:: Constant Field Values

SUPER_INTERFACES

static final int SUPER_INTERFACES

This value should be used to read the constant pool entries and the super interface names of a .class file.

See Also:: Constant Field Values

CLASSFILE_ATTRIBUTES

static final int CLASSFILE_ATTRIBUTES

This value should be used to read the constant pool entries and the attributes of a .class file.

See Also:: Constant Field Values

METHOD_BODIES

static final int METHOD_BODIES

This value should be used to read the method bodies. It has to be used with METHOD_INFOS.

See Also:: Constant Field Values

ALL_BUT_METHOD_BODIES

static final int ALL_BUT_METHOD_BODIES

This value should be used to read the whole contents of the .class file except the method bodies.

See Also:: Constant Field Values

Method Detail

getAccessFlags

int getAccessFlags()

Answer back the access flag of the .class file.

Returns:: the access flag of the .class file

getFieldInfos


IFieldInfo[] getFieldInfos()

Answer back the array of field infos of the .class file, an empty array if none.

Returns:: the array of field infos of the .class file, an empty array if none

getInterfaceNames

char[][] getInterfaceNames()

Answer back the names of interfaces implemented by this .class file, an empty array if none. The names are returned as described in the JVM specifications.

Returns:: the names of interfaces implemented by this .class file, an empty array if none

getInterfaceIndexes

int[] getInterfaceIndexes()

Answer back the indexes in the constant pool of interfaces implemented by this .class file, an empty array if none.

Returns:: the indexes in the constant pool of interfaces implemented by this .class file, an empty array if none

getInnerClassesAttribute


IInnerClassesAttribute getInnerClassesAttribute()

Answer back the inner classes attribute of this .class file, null if none.

Returns:: the inner classes attribute of this .class file, null if none

getMethodInfos


IMethodInfo[] getMethodInfos()

Answer back the array of method infos of this .class file, an empty array if none.

Returns:: the array of method infos of this .class file, an empty array if none

getClassName

char[] getClassName()

Answer back the qualified name of the .class file. The name is returned as described in the JVM specifications.

Returns:: the qualified name of the .class file

getClassIndex

int getClassIndex()

Answer back the index of the class name in the constant pool of the .class file.

Returns:: the index of the class name in the constant pool

getSuperclassName

char[] getSuperclassName()

Answer back the qualified name of the superclass of this .class file. The name is returned as described in the JVM specifications. Answer null if getSuperclassIndex() is zero.

Returns:: the qualified name of the superclass of this .class file, null if getSuperclassIndex() is zero

getSuperclassIndex

int getSuperclassIndex()

Answer back the index of the superclass name in the constant pool of the .class file. Answer 0 if this .class file represents java.lang.Object.

Returns:: the index of the superclass name in the constant pool of the .class file, 0 if this .class file represents java.lang.Object.

isClass

boolean isClass()

Answer true if this .class file represents an class, false otherwise.

Returns:: true if this .class file represents an class, false otherwise

isInterface

boolean isInterface()

Answer true if this .class file represents an interface, false otherwise.

Returns:: true if this .class file represents an interface, false otherwise

getSourceFileAttribute


ISourceAttribute getSourceFileAttribute()

Answer the source file attribute, if it exists, null otherwise.

Returns:: the source file attribute, if it exists, null otherwise

getConstantPool


IConstantPool getConstantPool()

Answer the constant pool of this .class file.

Returns:: the constant pool of this .class file

getMinorVersion

int getMinorVersion()

Answer the minor version of this .class file.

Returns:: the minor version of this .class file

getMajorVersion

int getMajorVersion()

Answer the major version of this .class file.

Returns:: the major version of this .class file

getAttributeCount

int getAttributeCount()

Answer back the attribute number of the .class file.

Returns:: the attribute number of the .class file

getAttributes


IClassFileAttribute[] getAttributes()

Answer back the collection of all attributes of the field info. It includes SyntheticAttribute, ConstantValueAttributes, etc. Answers an empty array if none.

Returns:: the collection of all attributes of the field info. It includes SyntheticAttribute, ConstantValueAttributes, etc. Answers an empty array if none

getMagic

int getMagic()

Answer back the magic number.

Returns:: the magic number

getFieldsCount

int getFieldsCount()

Answer back the number of field infos.

Returns:: the number of field infos

getMethodsCount

int getMethodsCount()

Answer back the number of method infos.

Returns:: the number of method infos