Eclipse Xtext 2.39.0 · org.eclipse.xtext.xbase.lib.ObjectExtensions

Access	Constructor and Description
public	ObjectExtensions()

Method Summary

Modifier and Type	Method and Description
public static boolean	Returns: Java's `a == b` identityEquals(Object an object. a, Object another object. b) Returns `true` if `a` and `b` are identical (the same instance) or both `null`.
public static <T> T	Returns: the reference to object. operator_doubleArrow(T an object. Can be `null`. object, Procedures.Procedure1<? super T> the block to execute with the given object. Must not be `null`. block) The `doubleArrow` operator is used as a 'with'- or 'let'-operation.
public static <T> T	Returns: a reference to `first` if `first != null` , `second otherwise,` `operator_elvis(T an Object. Might be null.first, T an Object. Might be null.second)The elvis operator ?: is a short hand notation for providing default value in case an expression evaluates to null.`
public static boolean	Returns: `true` if `a` and `b` are equal. operator_equals(Object an object. a, Object another object. b) The `equals` operator.
public static <A, B> Pair<A, B>	Returns: a `Pair`. Never `null`. operator_mappedTo(A an object. a, B another object. b) The `mappedTo` operator yields a `Pair` with `a` as the `key` and `b` as its `value`.
public static boolean	Returns: `true` if `a` and `b` are not equal. operator_notEquals(Object an object. a, Object another object. b) The `equals not` operator.
public static String	Returns: `a + b` operator_plus(Object an `Object`. a, String a `String`. b) The binary `+` operator that concatenates two strings.
public static boolean	Returns: Java's `a == b` operator_tripleEquals(Object an object. a, Object another object. b) The `identity equals` operator.
public static boolean	Returns: Java's `a != b` operator_tripleNotEquals(Object an object. a, Object another object. b) The `identity not equals` operator.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

ObjectExtensions	back to summary
public ObjectExtensions()

Method Detail

identityEquals back to summary

identityEquals	back to summary
public static boolean identityEquals(Object a, Object b) Returns `true` if `a` and `b` are identical (the same instance) or both `null`. This is the equivalent to Java's `==` operator. Parameters a:Object an object. b:Object another object. Returns:boolean Java's `a == b` Annotations @Pure @Inline:($1 == $2) constantExpression:true

public static boolean identityEquals(Object a, Object b)

Returns true if a and b are identical (the same instance) or both null. This is the equivalent to Java's == operator.

Parameters

a:Object: an object.
b:Object: another object.

Returns:boolean

Java's a == b

Annotations

@Pure
@Inline:($1 == $2)
constantExpression:true

operator_doubleArrow back to summary

operator_doubleArrow	back to summary
public static <T> T operator_doubleArrow(T object, Procedures.Procedure1<? super T> block) The `doubleArrow` operator is used as a 'with'- or 'let'-operation. It allows to bind an object to a local scope in order to do something on it. Example: `new Person => [ firstName = 'Han' lastName = 'Solo' ]` Parameters object:T an object. Can be `null`. block:Procedures.Procedure1<? super T> the block to execute with the given object. Must not be `null`. Returns:T the reference to object. Since 2.3

public static <T> T operator_doubleArrow(T object, Procedures.Procedure1<? super T> block)

The doubleArrow operator is used as a 'with'- or 'let'-operation. It allows to bind an object to a local scope in order to do something on it. Example: new Person => [ firstName = 'Han' lastName = 'Solo' ]

Parameters

object:T: an object. Can be null.
block:Procedures.Procedure1<? super T>: the block to execute with the given object. Must not be null.

Returns:T

the reference to object.

Since

2.3

operator_elvis back to summary

operator_elvis	back to summary
public static <T> T operator_elvis(T first, T second) The elvis operator `?:` is a short hand notation for providing default value in case an expression evaluates to `null`. Not that the Xtend compiler will inline calls to this not call this method with a short-circuit semantic. That is the second argument is only evaluated if the first one evaluates to `null`. Example: `person.name?:'Hans'` Parameters first:T an `Object`. Might be `null`. second:T an `Object`. Might be `null`. Returns:T a reference to `first` if `first != null` , `second otherwise,` `Annotations` `@Pure` `Since` `2.3`

public static <T> T operator_elvis(T first, T second)

The elvis operator ?: is a short hand notation for providing default value in case an expression evaluates to null. Not that the Xtend compiler will inline calls to this not call this method with a short-circuit semantic. That is the second argument is only evaluated if the first one evaluates to null. Example: person.name?:'Hans'

Parameters

first:T: an Object. Might be null.
second:T: an Object. Might be null.

Returns:T

a reference to first if first != null , second otherwise,

Annotations

@Pure

Since

2.3

operator_equals back to summary

operator_equals	back to summary
public static boolean operator_equals(Object a, Object b) The `equals` operator. This is the equivalent to a null-safe invocation of `Object#equals(Object)`. Parameters a:Object an object. b:Object another object. Returns:boolean `true` if `a` and `b` are equal. Annotations @Pure @Inline:$3.equals($1, $2) imported:Objects

public static boolean operator_equals(Object a, Object b)

The equals operator. This is the equivalent to a null-safe invocation of Object#equals(Object).

Parameters

a:Object: an object.
b:Object: another object.

Returns:boolean

true if a and b are equal.

Annotations

@Pure
@Inline:$3.equals($1, $2)
imported:Objects

operator_mappedTo back to summary

operator_mappedTo	back to summary
public static <A, B> Pair<A, B> operator_mappedTo(A a, B b) The `mappedTo` operator yields a `Pair` with `a` as the `key` and `b` as its `value`. Parameters a:A an object. b:B another object. Returns:Pair<A, B> a `Pair`. Never `null`. Annotations @Pure @Inline:$3.$4of($1, $2) imported:Pair

public static <A, B> Pair<A, B> operator_mappedTo(A a, B b)

The mappedTo operator yields a Pair with a as the key and b as its value.

Parameters

a:A: an object.
b:B: another object.

Returns:Pair<A, B>

a Pair. Never null.

Annotations

@Pure
@Inline:$3.$4of($1, $2)
imported:Pair

operator_notEquals back to summary

operator_notEquals	back to summary
public static boolean operator_notEquals(Object a, Object b) The `equals not` operator. This is the equivalent to a negated, null-safe `Object#equals(Object)` method. Parameters a:Object an object. b:Object another object. Returns:boolean `true` if `a` and `b` are not equal. Annotations @Pure @Inline:(!$3.equals($1, $2)) imported:Objects

public static boolean operator_notEquals(Object a, Object b)

The equals not operator. This is the equivalent to a negated, null-safe Object#equals(Object) method.

Parameters

a:Object: an object.
b:Object: another object.

Returns:boolean

true if a and b are not equal.

Annotations

@Pure
@Inline:(!$3.equals($1, $2))
imported:Objects

operator_plus back to summary

operator_plus	back to summary
public static String operator_plus(Object a, String b) The binary `+` operator that concatenates two strings. Parameters a:Object an `Object`. b:String a `String`. Returns:String `a + b` Annotations @Pure @Inline:($1 + $2) Since 2.3

public static String operator_plus(Object a, String b)

The binary + operator that concatenates two strings.

Parameters

a:Object: an Object.
b:String: a String.

Returns:String

a + b

Annotations

@Pure
@Inline:($1 + $2)

Since

2.3

operator_tripleEquals back to summary

operator_tripleEquals	back to summary
public static boolean operator_tripleEquals(Object a, Object b) The `identity equals` operator. This is the equivalent to Java's `==` operator. Parameters a:Object an object. b:Object another object. Returns:boolean Java's `a == b` Annotations @Pure @Inline:($1 == $2) constantExpression:true Since 2.4

public static boolean operator_tripleEquals(Object a, Object b)

The identity equals operator. This is the equivalent to Java's == operator.

Parameters

a:Object: an object.
b:Object: another object.

Returns:boolean

Java's a == b

Annotations

@Pure
@Inline:($1 == $2)
constantExpression:true

Since

2.4

operator_tripleNotEquals back to summary

operator_tripleNotEquals	back to summary
public static boolean operator_tripleNotEquals(Object a, Object b) The `identity not equals` operator. This is the equivalent to Java's `!=` operator. Parameters a:Object an object. b:Object another object. Returns:boolean Java's `a != b` Annotations @Pure @Inline:($1 != $2) constantExpression:true Since 2.4

public static boolean operator_tripleNotEquals(Object a, Object b)

The identity not equals operator. This is the equivalent to Java's != operator.

Parameters

a:Object: an object.
b:Object: another object.

Returns:boolean

Java's a != b

Annotations

@Pure
@Inline:($1 != $2)
constantExpression:true

Since

2.4

public Class ObjectExtensions

Constructor Summary

Method Summary

Constructor Detail

Method Detail