Package org.apache.tomcat.util.bcel.classfile

Class ElementValue

java.lang.Object

org.apache.tomcat.util.bcel.classfile.ElementValue

Direct Known Subclasses:

AnnotationElementValue, ArrayElementValue, ClassElementValue, EnumElementValue, SimpleElementValue

public abstract class ElementValue
extends java.lang.Object

The element_value structure is documented at https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.7.16.1

 element_value {
     u1 tag;
     union {
         u2 const_value_index;

         {   u2 type_name_index;
             u2 const_name_index;
         } enum_const_value;

         u2 class_info_index;

         annotation annotation_value;

         {   u2            num_values;
             element_value values[num_values];
         } array_value;
     } value;
 }
 

Field Summary

Fields

Modifier and Type	Field	Description
static byte	ANNOTATION	Tag for an annotation element value.
static byte	ARRAY	Tag for an array element value.
static byte	CLASS	Tag for a class element value.
static byte	ENUM_CONSTANT	Tag for an enum constant element value.
static byte	PRIMITIVE_BOOLEAN	Tag for a boolean primitive element value.
static byte	PRIMITIVE_BYTE	Tag for a byte primitive element value.
static byte	PRIMITIVE_CHAR	Tag for a char primitive element value.
static byte	PRIMITIVE_DOUBLE	Tag for a double primitive element value.
static byte	PRIMITIVE_FLOAT	Tag for a float primitive element value.
static byte	PRIMITIVE_INT	Tag for an int primitive element value.
static byte	PRIMITIVE_LONG	Tag for a long primitive element value.
static byte	PRIMITIVE_SHORT	Tag for a short primitive element value.
static byte	STRING	Tag for a String element value.

Method Summary

Modifier and Type	Method	Description
static ElementValue	readElementValue(java.io.DataInput input, ConstantPool cpool)	Reads an element_value as an ElementValue.
static ElementValue	readElementValue(java.io.DataInput input, ConstantPool cpool, int arrayNesting)	Reads an element_value as an ElementValue.
abstract java.lang.String	stringifyValue()	Returns a string representation of this element value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

STRING

public static final byte STRING

Tag for a String element value.

See Also:

Constant Field Values

ENUM_CONSTANT

public static final byte ENUM_CONSTANT

Tag for an enum constant element value.

See Also:

Constant Field Values

CLASS

public static final byte CLASS

Tag for a class element value.

See Also:

Constant Field Values

ANNOTATION

public static final byte ANNOTATION

Tag for an annotation element value.

See Also:

Constant Field Values

ARRAY

public static final byte ARRAY

Tag for an array element value.

See Also:

Constant Field Values

PRIMITIVE_INT

public static final byte PRIMITIVE_INT

Tag for an int primitive element value.

See Also:

Constant Field Values

PRIMITIVE_BYTE

public static final byte PRIMITIVE_BYTE

Tag for a byte primitive element value.

See Also:

Constant Field Values

PRIMITIVE_CHAR

public static final byte PRIMITIVE_CHAR

Tag for a char primitive element value.

See Also:

Constant Field Values

PRIMITIVE_DOUBLE

public static final byte PRIMITIVE_DOUBLE

Tag for a double primitive element value.

See Also:

Constant Field Values

PRIMITIVE_FLOAT

public static final byte PRIMITIVE_FLOAT

Tag for a float primitive element value.

See Also:

Constant Field Values

PRIMITIVE_LONG

public static final byte PRIMITIVE_LONG

Tag for a long primitive element value.

See Also:

Constant Field Values

PRIMITIVE_SHORT

public static final byte PRIMITIVE_SHORT

Tag for a short primitive element value.

See Also:

Constant Field Values

PRIMITIVE_BOOLEAN

public static final byte PRIMITIVE_BOOLEAN

Tag for a boolean primitive element value.

See Also:

Constant Field Values

Method Detail

readElementValue

public static ElementValue readElementValue(java.io.DataInput input,
                                            ConstantPool cpool)
                                     throws java.io.IOException

Reads an element_value as an ElementValue.

Parameters:

input - Raw data input.

cpool - Constant pool.

Returns:

a new ElementValue.

Throws:

java.io.IOException - if an I/O error occurs.

readElementValue

public static ElementValue readElementValue(java.io.DataInput input,
                                            ConstantPool cpool,
                                            int arrayNesting)
                                     throws java.io.IOException

Reads an element_value as an ElementValue.

Parameters:

input - Raw data input.

cpool - Constant pool.

arrayNesting - level of current array nesting.

Returns:

a new ElementValue.

Throws:

java.io.IOException - if an I/O error occurs.

Since:

6.7.0

stringifyValue

public abstract java.lang.String stringifyValue()

Returns a string representation of this element value.

Returns:

the string representation