org.eclipse.jdt.core
Interface IMemberValuePair

All Known Implementing Classes:

MemberValuePair

public interface IMemberValuePair

Represents a member-value pair of an annotation. The value is represented by an Object. To get the exact type of this object, use its value kind. If this value is an array, getValue() returns an instance of Object[] and the value kind returns the kind of the elements in this array.

This interface is not intended to be implemented or extended by clients.

Since:

3.4

Field Summary

static int	K_ANNOTATION Constant indicating that the value kind is an annotation represented by an instance of IAnnotation.
static int	K_BOOLEAN Constant indicating that the value kind is a boolean represented by an instance of Boolean.
static int	K_BYTE Constant indicating that the value kind is a byte represented by an instance of Byte.
static int	K_CHAR Constant indicating that the value kind is a char represented by an instance of Character.
static int	K_CLASS Constant indicating that the value kind is a Class represented by the name of the class (i.e.
static int	K_DOUBLE Constant indicating that the value kind is a double represented by an instance of Double.
static int	K_FLOAT Constant indicating that the value kind is a float represented by an instance of Float.
static int	K_INT Constant indicating that the value kind is an int represented by an instance of Integer.
static int	K_LONG Constant indicating that the value kind is a long represented by an instance of Long.
static int	K_QUALIFIED_NAME Constant indicating that the value is a qualified name represented by a String.
static int	K_SHORT Constant indicating that the value kind is a short represented by an instance of Short.
static int	K_SIMPLE_NAME Constant indicating that the value is a simple name represented by a String.
static int	K_STRING Constant indicating that the value kind is a String represented by the corresponding String.
static int	K_UNKNOWN Constant indicating that the value kind is unknown at this stage.

Method Summary

java.lang.String	getMemberName() Returns the member's name of this member-value pair.
java.lang.Object	getValue() Returns the value of this member-value pair.
int	getValueKind() Returns the value kind of this member-value pair.

Field Detail

K_INT

static final int K_INT

Constant indicating that the value kind is an int represented by an instance of Integer.

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Constant Field Values

K_BYTE

static final int K_BYTE

Constant indicating that the value kind is a byte represented by an instance of Byte.

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Constant Field Values

K_SHORT

static final int K_SHORT

Constant indicating that the value kind is a short represented by an instance of Short.

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Constant Field Values

K_CHAR

static final int K_CHAR

Constant indicating that the value kind is a char represented by an instance of Character.

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Constant Field Values

K_FLOAT

static final int K_FLOAT

Constant indicating that the value kind is a float represented by an instance of Float.

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Constant Field Values

K_DOUBLE

static final int K_DOUBLE

Constant indicating that the value kind is a double represented by an instance of Double.

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Constant Field Values

K_LONG

static final int K_LONG

Constant indicating that the value kind is a long represented by an instance of Long.

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Constant Field Values

K_BOOLEAN

static final int K_BOOLEAN

Constant indicating that the value kind is a boolean represented by an instance of Boolean.

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Constant Field Values

K_STRING

static final int K_STRING

Constant indicating that the value kind is a String represented by the corresponding String.

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Constant Field Values

K_ANNOTATION

static final int K_ANNOTATION

Constant indicating that the value kind is an annotation represented by an instance of IAnnotation.

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Constant Field Values

K_CLASS

static final int K_CLASS

Constant indicating that the value kind is a Class represented by the name of the class (i.e. a String. If the member-value pair is coming from a compilation unit, this is either a simple name (e.g. for MyType.class, the name is "MyType"), or a qualified name (e.g. for x.y.MyType.MyNestedType.class, the name is "x.y.MyType.MyNestedType"). If the member-value pair is coming from a class file, this is always a fully qualified name.

Note that one can use IType.resolveType(String) and e.g. IJavaProject.findType(String, String, org.eclipse.core.runtime.IProgressMonitor) to find the corresponding IType.

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Constant Field Values

K_QUALIFIED_NAME

static final int K_QUALIFIED_NAME

Constant indicating that the value is a qualified name represented by a String. The qualified name refers to an enum constant or another compile-time constant if the code is correct (e.g. "MyEnum.FIRST").

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Constant Field Values

K_SIMPLE_NAME

static final int K_SIMPLE_NAME

Constant indicating that the value is a simple name represented by a String. The simple name refers to an enum constant or another compile-time constant if the code is correct (e.g. "FIRST" when there is a static import for "MyEnum.FIRST").

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Constant Field Values

K_UNKNOWN

static final int K_UNKNOWN

Constant indicating that the value kind is unknown at this stage. The value is unknown in the following cases:

• the value is an expression that would need to be further analyzed to determine its kind. For example, in @MyAnnot(1 + 2.3) the kind of the expression "1 + 2.3" is unknown
• the value is an array of size 0, e.g. @MyAnnot({})
• the value is an array that contains at least one expression that would need to be further analyzed to determine its kind. For example, in @MyAnnot({3.4, 1 + 2.3}), the kind of the second element "1 + 2.3" is unknown.
• the value is an array that contains heterogeneous values, e.g. @MyAnnot(1, 2.3, "abc")

If the value kind is unknown, the returned value is always either null, or an array containing Objects and/or nulls for unknown elements.

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Constant Field Values

Method Detail

getMemberName

java.lang.String getMemberName()

Returns the member's name of this member-value pair.

Returns:

the member's name of this member-value pair.

getValue

java.lang.Object getValue()

Returns the value of this member-value pair. The type of this value is function of this member-value pair's value kind. It is an instance of Object[] if the value is an array.

If the value kind is K_UNKNOWN and the value is not an array, then the value is null. If the value kind is K_UNKNOWN and the value is an array, then the value is an array containing Objects and/or nulls for unknown elements. See K_UNKNOWN for more details.

Returns:

the value of this member-value pair.

getValueKind

int getValueKind()

Returns the value kind of this member-value pair. This indicates the instance of the returned value, or the instance of the elements if the value is an array. The value kind is one of the following constants: K_ANNOTATION, K_BOOLEAN, K_BYTE, K_CHAR, K_CLASS, K_DOUBLE, K_FLOAT, K_INT, K_LONG, K_QUALIFIED_NAME, K_SIMPLE_NAME, K_SHORT, K_STRING, K_UNKNOWN.

Returns:

the value kind of this member-value pair