Package org.jboss.util
Class Objects
- java.lang.Object
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- org.jboss.util.Objects
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public final class Objects extends java.lang.Object
A collection ofObject
utilities.
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Constructor Summary
Constructors Constructor Description Objects()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.Object
copy(java.io.Serializable obj)
Copy an serializable object deeply.static java.lang.Object
deref(java.lang.Object obj)
Dereference the given object if it is non-null and is an instance ofReference
.static <T> T
deref(java.lang.Object obj, java.lang.Class<T> expected)
Dereference an objectstatic boolean
equals(java.lang.Object[] a, java.lang.Object[] b)
Test the equality of two object arrays.static boolean
equals(java.lang.Object[] a, java.lang.Object[] b, boolean deep)
Test the equality of two object arrays.static boolean
equals(java.lang.Object first, java.lang.Object second)
Test the equality of two objects.static java.lang.reflect.Constructor
getCompatibleConstructor(java.lang.Class type, java.lang.Class valueType)
Get a compatible constructor for the given value typestatic boolean
isArray(java.lang.Object obj)
Check if the given object is an array (primitve or native).static java.lang.Object[]
toArray(java.lang.Object obj)
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Method Detail
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getCompatibleConstructor
public static java.lang.reflect.Constructor getCompatibleConstructor(java.lang.Class type, java.lang.Class valueType)
Get a compatible constructor for the given value type- Parameters:
type
- Class to look for constructor invalueType
- Argument type for constructor- Returns:
- Constructor or null
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copy
public static java.lang.Object copy(java.io.Serializable obj) throws java.io.IOException, java.lang.ClassNotFoundException
Copy an serializable object deeply.- Parameters:
obj
- Object to copy.- Returns:
- Copied object.
- Throws:
java.io.IOException
java.lang.ClassNotFoundException
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deref
public static java.lang.Object deref(java.lang.Object obj)
Dereference the given object if it is non-null and is an instance ofReference
. If the object is null then null is returned. If the object is not an instance ofReference
, then the object is returned.- Parameters:
obj
- Object to dereference.- Returns:
- Dereferenced object.
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deref
public static <T> T deref(java.lang.Object obj, java.lang.Class<T> expected)
Dereference an object- Type Parameters:
T
- the expected type- Parameters:
obj
- the object or referenceexpected
- the expected type- Returns:
- the object or null
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isArray
public static boolean isArray(java.lang.Object obj)
Check if the given object is an array (primitve or native).- Parameters:
obj
- Object to test.- Returns:
- True of the object is an array.
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toArray
public static java.lang.Object[] toArray(java.lang.Object obj)
- Parameters:
obj
- Object to convert to an array. Converts primitive arrays to Object arrays consisting of their wrapper classes. If the object is not an array (object or primitve) then a new array of the given type is created and the object is set as the sole element.- Returns:
- an Object array for the given object.
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equals
public static boolean equals(java.lang.Object[] a, java.lang.Object[] b, boolean deep)
Test the equality of two object arrays.- Parameters:
a
- The first array.b
- The second array.deep
- True to traverse elements which are arrays.- Returns:
- True if arrays are equal.
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equals
public static boolean equals(java.lang.Object[] a, java.lang.Object[] b)
Test the equality of two object arrays.- Parameters:
a
- The first array.b
- The second array.- Returns:
- True if arrays are equal.
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equals
public static boolean equals(java.lang.Object first, java.lang.Object second)
Test the equality of two objects. They can be an (multi dimensional) array.- Parameters:
first
- the first obejctsecond
- the second object- Returns:
- true if equal, false otherwise
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