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

      Fields 
      Modifier and Type Field Description
      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.
    • 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 flags of the .class file.
        Returns:
        the access flags 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
      • getNestMembersAttribute

        default INestMembersAttribute getNestMembersAttribute()
        Answer back the nest members attribute of this .class file, null if none.
        Returns:
        the nest members attribute of this .class file, null if none
        Since:
        3.16
      • 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 a class, false otherwise.
        Returns:
        true if this .class file represents a 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