Field Detail

• minor_version

  protected int minor_version

  Minor class format number defaults to VMDescriptor.JAVA_CLASS_FORMAT_MINOR_VERSION which currently corresponds to a really old (JDK 1.0.2) setting. The default major and minor value is used by the generated code for Derby's SQL statements. Currently there is no need to bump the version number as the generated code does not take advantage of any of the new elements in the class file format. If such a need exists then this can be bumped. One issue is that the change in format numbers is not well documented.

• major_version

  protected int major_version

  Minor class format number defaults to VMDescriptor.JAVA_CLASS_FORMAT_MAJOR_VERSION

• access_flags

  protected int access_flags

• this_class

  protected int this_class

• super_class

  protected int super_class

• interfaces

  protected int[] interfaces

• field_info

  protected MemberTable field_info

• method_info

  protected MemberTable method_info

• attribute_info

  protected Attributes attribute_info

• cptHashTable

  protected java.util.Hashtable<java.lang.Object,​ConstantPoolEntry> cptHashTable

• cptEntries

  protected java.util.Vector<ConstantPoolEntry> cptEntries

• cptEstimatedSize

  private int cptEstimatedSize

• searchIndex

  private final CONSTANT_Index_info searchIndex

  Used to search for index entries to avoid object allocation in the case a referecne already exists.

Constructor Detail

• ClassHolder

  protected ClassHolder​(int estimatedConstantPoolCount)

• ClassHolder

  public ClassHolder​(java.lang.String fullyQualifiedName,
                     java.lang.String superClassName,
                     int modifiers)

  This will not define a constructor -- it is up to the caller to add at least one.

Method Detail

• put

  private void put​(ClassFormatOutput out)
            throws java.io.IOException

  Throws:

  java.io.IOException

• getFileFormat

  public ByteArray getFileFormat()
                          throws java.io.IOException

  Convert the object representation of the class into its class file format.

  Throws:

  java.io.IOException - error writing the class

• getModifier

  public int getModifier()

  See Also:

  ClassMember

• getName

  public java.lang.String getName()

  See Also:

  ClassMember

• addMember

  public ClassMember addMember​(java.lang.String simpleName,
                               java.lang.String descriptor,
                               int modifier)

  See Also:

  addMember(java.lang.String, java.lang.String, int)

• addFieldReference

  public int addFieldReference​(java.lang.String className,
                               java.lang.String simpleName,
                               java.lang.String descriptor)

  See Also:

  addFieldReference(java.lang.String, java.lang.String, java.lang.String)

• addFieldReference

  public int addFieldReference​(ClassMember field)

• addMethodReference

  public int addMethodReference​(java.lang.String className,
                                java.lang.String simpleName,
                                java.lang.String descriptor,
                                boolean isInterface)

  See Also:

  addMethodReference(java.lang.String, java.lang.String, java.lang.String, boolean)

• addReference

  private int addReference​(int tag,
                           java.lang.String className,
                           java.lang.String simpleName,
                           java.lang.String descriptor)

• addReference

  private int addReference​(int tag,
                           ClassMember member)

• addConstant

  public int addConstant​(java.lang.String value)

  See Also:

  addConstant(java.lang.String)

• addUtf8

  public int addUtf8​(java.lang.String value)

  See Also:

  addUtf8(java.lang.String)

• addConstant

  public int addConstant​(int value)

  See Also:

  addConstant(java.lang.String)

• addConstant

  public int addConstant​(float value)

  See Also:

  addConstant(java.lang.String)

• addConstant

  public int addConstant​(long value)

  See Also:

  addConstant(java.lang.String)

• addConstant

  public int addConstant​(double value)

  See Also:

  addConstant(java.lang.String)

• getConstantPoolIndex

  public int getConstantPoolIndex()

  See Also:

  ClassMember

• addAttribute

  public void addAttribute​(java.lang.String attributeName,
                           ClassFormatOutput info)

• getSuperClassName

  public java.lang.String getSuperClassName()

• addEntry

  protected int addEntry​(java.lang.Object key,
                         ConstantPoolEntry item)

  Generic add entry to constant pool. Includes the logic for an entry to occupy more than one slot (e.g. long).

  Returns:

  The number of slots occupied by the entry. .

• addDirectEntry

  private int addDirectEntry​(ConstantPoolEntry item)

  Add an entry, but only if it doesn't exist.

  Returns:

  the constant pool index of the added or existing item.

• addIndexReference

  private int addIndexReference​(int tag,
                                int i1,
                                int i2)

  Add an index reference.

• addClassReference

  public int addClassReference​(java.lang.String fullyQualifiedName)

  Add a class entry to the pool.

• addNameAndType

  private int addNameAndType​(java.lang.String name,
                             java.lang.String descriptor)

  Add a name and type entry

• addUtf8Entry

  private CONSTANT_Utf8_info addUtf8Entry​(java.lang.String value)

  Add a UTF8 into the pool and return the index to it.

• addExtraUtf8

  private CONSTANT_Utf8_info addExtraUtf8​(java.lang.String value)

  Add an extra UTF8 into the pool

• addString

  private int addString​(java.lang.String value)

  Add a string entry

• cptPut

  protected void cptPut​(ClassFormatOutput out)
                 throws java.io.IOException

  Throws:

  java.io.IOException

• getEntry

  public ConstantPoolEntry getEntry​(int index)

• className

  protected java.lang.String className​(int classIndex)

  Return the class name for an index to a CONSTANT_Class_info.

• findUtf8

  int findUtf8​(java.lang.String value)

  Return the index of a UTF entry or -1 if it doesn't exist.

• findClass

  public int findClass​(java.lang.String fullyQualifiedName)

  Find a class descriptor (section 4.4.1) and return its index, returns -1 if not found.

• findNameAndType

  public int findNameAndType​(java.lang.String name,
                             java.lang.String descriptor)

  Find a name and type descriptor (section 4.4.6) and return it's index.

  returns -1 if not found.

• findIndexEntry

  protected CONSTANT_Index_info findIndexEntry​(int tag,
                                               int i1,
                                               int i2)

• findIndexIndex

  protected int findIndexIndex​(int tag,
                               int i1,
                               int i2)

• findMatchingEntry

  protected ConstantPoolEntry findMatchingEntry​(java.lang.Object key)

• nameIndexToString

  java.lang.String nameIndexToString​(int index)

  get a string (UTF) given a name_index into the constant pool

• getClassName

  protected java.lang.String getClassName​(int index)

  get the class name of a Class given the index of its CONSTANT_Class_info entry in the Constant Pool.

• isExternalClassName

  public static boolean isExternalClassName​(java.lang.String className)

• convertToInternalClassName

  public static java.lang.String convertToInternalClassName​(java.lang.String externalName)

• convertToInternalDescriptor

  public static java.lang.String convertToInternalDescriptor​(java.lang.String externalName)

• convertToInternal

  private static java.lang.String convertToInternal​(java.lang.String externalName,
                                                    boolean descriptor)

• makeDesc

  private static java.lang.String makeDesc​(char builtin,
                                           int arity)

  A helper to build a type description based on a built-in type and an array arity.

• makeDesc

  private static java.lang.String makeDesc​(java.lang.String className,
                                           int arity,
                                           boolean descriptor)

  A helper to build a type description based on a Java class and an array arity. If descriptor is true create a descriptor according to section 4.3.2 of the vm spec. If false create a class name according to sections 4.3.2 and 4.4.1 of the vm spec.