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package io.github.dmlloyd.classfile;
import io.github.dmlloyd.classfile.constantpool.Utf8Entry;
import java.lang.constant.ClassDesc;
import io.github.dmlloyd.classfile.impl.AnnotationImpl;
import io.github.dmlloyd.classfile.impl.TemporaryConstantPool;
/**
* Models an element-value pair in the {@code element_value_pairs}
* table in the {@code annotation} structure defined in JVMS
* {@jvms 4.7.16} or the {@code type_annotation} structure defined
* in JVMS {@jvms 4.7.20}.
*
* Two {@code AnnotationElement} objects should be compared using the
* {@link Object#equals(Object) equals} method.
*
* @see Annotation
* @see AnnotationValue
*
* @since 24
*/
public sealed interface AnnotationElement
permits AnnotationImpl.AnnotationElementImpl {
/**
* {@return the element name}
*
* @apiNote
* In Java source code, by convention, the name of the sole element in a
* single-element annotation interface is {@code value}. (JLS {@jls 9.6.1})
* This is the case for single-element annotations (JLS {@jls 9.7.3}) and
* container annotations for multiple annotations (JLS {@jls 9.6.3}).
*/
Utf8Entry name();
/**
* {@return the element value}
*/
AnnotationValue value();
/**
* {@return an element-value pair}
* @param name the name of the key
* @param value the associated value
*/
static AnnotationElement of(Utf8Entry name,
AnnotationValue value) {
return new AnnotationImpl.AnnotationElementImpl(name, value);
}
/**
* {@return an element-value pair}
* @param name the name of the key
* @param value the associated value
*/
static AnnotationElement of(String name,
AnnotationValue value) {
return of(TemporaryConstantPool.INSTANCE.utf8Entry(name), value);
}
/**
* {@return an element-value pair for a class-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofClass(ClassDesc) AnnotationValue::ofClass
*/
static AnnotationElement ofClass(String name,
ClassDesc value) {
return of(name, AnnotationValue.ofClass(value));
}
/**
* {@return an element-value pair for a string-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofString(String) AnnotationValue::ofString
*/
static AnnotationElement ofString(String name,
String value) {
return of(name, AnnotationValue.ofString(value));
}
/**
* {@return an element-value pair for a long-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofLong(long) AnnotationValue::ofLong
*/
static AnnotationElement ofLong(String name,
long value) {
return of(name, AnnotationValue.ofLong(value));
}
/**
* {@return an element-value pair for an int-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofInt(int) AnnotationValue::ofInt
*/
static AnnotationElement ofInt(String name,
int value) {
return of(name, AnnotationValue.ofInt(value));
}
/**
* {@return an element-value pair for a char-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofChar(char) AnnotationValue::ofChar
*/
static AnnotationElement ofChar(String name,
char value) {
return of(name, AnnotationValue.ofChar(value));
}
/**
* {@return an element-value pair for a short-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofShort(short) AnnotationValue::ofShort
*/
static AnnotationElement ofShort(String name,
short value) {
return of(name, AnnotationValue.ofShort(value));
}
/**
* {@return an element-value pair for a byte-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofByte(byte) AnnotationValue::ofByte
*/
static AnnotationElement ofByte(String name,
byte value) {
return of(name, AnnotationValue.ofByte(value));
}
/**
* {@return an element-value pair for a boolean-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofBoolean(boolean) AnnotationValue::ofBoolean
*/
static AnnotationElement ofBoolean(String name,
boolean value) {
return of(name, AnnotationValue.ofBoolean(value));
}
/**
* {@return an element-value pair for a double-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofDouble(double) AnnotationValue::ofDouble
*/
static AnnotationElement ofDouble(String name,
double value) {
return of(name, AnnotationValue.ofDouble(value));
}
/**
* {@return an element-value pair for a float-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofFloat(float) AnnotationValue::ofFloat
*/
static AnnotationElement ofFloat(String name,
float value) {
return of(name, AnnotationValue.ofFloat(value));
}
/**
* {@return an element-value pair for an annotation-valued element}
* @param name the name of the key
* @param value the associated value
* @see AnnotationValue#ofAnnotation AnnotationValue::ofAnnotation
*/
static AnnotationElement ofAnnotation(String name,
Annotation value) {
return of(name, AnnotationValue.ofAnnotation(value));
}
/**
* {@return an element-value pair for an array-valued element}
* @param name the name of the key
* @param values the associated values
* @see AnnotationValue#ofArray(AnnotationValue...) AnnotationValue::ofArray
*/
static AnnotationElement ofArray(String name,
AnnotationValue... values) {
return of(name, AnnotationValue.ofArray(values));
}
}