Package com.google.common.base
Class Equivalence.Wrapper<T>
- java.lang.Object
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- com.google.common.base.Equivalence.Wrapper<T>
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- All Implemented Interfaces:
java.io.Serializable
- Enclosing class:
- Equivalence<T>
public static final class Equivalence.Wrapper<T> extends java.lang.Object implements java.io.Serializable
Wraps an object so thatequals(Object)
andhashCode()
delegate to anEquivalence
.For example, given an
Equivalence
forstrings
namedequiv
that tests equivalence using their lengths:equiv.wrap("a").equals(equiv.wrap("b")) // true equiv.wrap("a").equals(equiv.wrap("hello")) // false
Note in particular that an equivalence wrapper is never equal to the object it wraps.
equiv.wrap(obj).equals(obj) // always false
- Since:
- 10.0
- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(@Nullable java.lang.Object obj)
Returnstrue
ifEquivalence.equivalent(Object, Object)
applied to the wrapped references istrue
and both wrappers use thesame
equivalence.@Nullable T
get()
Returns the (possibly null) reference wrapped by this instance.int
hashCode()
Returns the result ofEquivalence.hash(Object)
applied to the wrapped reference.java.lang.String
toString()
Returns a string representation for this equivalence wrapper.
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Method Detail
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equals
public boolean equals(@Nullable java.lang.Object obj)
Returnstrue
ifEquivalence.equivalent(Object, Object)
applied to the wrapped references istrue
and both wrappers use thesame
equivalence.- Overrides:
equals
in classjava.lang.Object
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hashCode
public int hashCode()
Returns the result ofEquivalence.hash(Object)
applied to the wrapped reference.- Overrides:
hashCode
in classjava.lang.Object
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toString
public java.lang.String toString()
Returns a string representation for this equivalence wrapper. The form of this string representation is not specified.- Overrides:
toString
in classjava.lang.Object
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