Package org.jboss.msc.value
Class Values
- java.lang.Object
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- org.jboss.msc.value.Values
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public final class Values extends java.lang.Object
Value utility methods.
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Field Summary
Fields Modifier and Type Field Description static java.util.List<Value<?>>
EMPTY_LIST
The empty value list.private static Value
EMPTY_LIST_VALUE
static java.util.List<? extends Value<java.lang.Class<?>>>
EMPTY_TYPE_LIST
The empty value type list.private static ThreadLocalValue<java.lang.Object>
INJECTED
private static java.lang.Object[]
NONE
private static Value
NULL
private static ThreadLocalValue<java.lang.Object>
THIS
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Constructor Summary
Constructors Modifier Constructor Description private
Values()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description private static <T> T[]
arrayOf(java.lang.Class<T> clazz, int len)
static <T> Value<T>
asSuperclass(Value<? extends T> value)
Safely re-cast a value as its superclass.static <T> Value<T>
cached(Value<T> value)
Get a cached value for some opaque value.static <T> java.util.List<Value<? extends T>>
emptyList()
The empty value list.static <T> Value<java.util.List<T>>
emptyListValue()
A value which yields the empty list.static java.lang.Object[]
getValues(java.lang.Iterable<? extends Value<?>> i)
Get an object array from the result of an iterable series of values.static <T> T[]
getValues(java.lang.Iterable<? extends Value<? extends T>> i, java.lang.Class<T> clazz)
Get a typed object array from the result of an iterable series of values.static <T> T[]
getValues(java.lang.Iterable<? extends Value<? extends T>> i, T[] array)
Get a typed object array from the result of an iterable series of values.private static java.lang.Object[]
getValues(java.util.Iterator<? extends Value<?>> i, int idx)
private static <T> T[]
getValues(java.util.Iterator<? extends Value<? extends T>> i, java.lang.Class<T> clazz, int idx)
static <T> Value<T>
immediateValue(T value)
Get an immediate value.static <T> java.util.List<Value<? extends T>>
immediateValues(java.util.List<T> values)
static <T> java.util.List<Value<? extends T>>
immediateValues(T... values)
static ThreadLocalValue<java.lang.Object>
injectedValue()
The special value representing the value of an injection operation.static <T> Value<T>
nullValue()
Get the null value.static ThreadLocalValue<java.lang.Object>
thisValue()
The special value representingthis
(the object being invoked upon).
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Field Detail
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THIS
private static final ThreadLocalValue<java.lang.Object> THIS
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INJECTED
private static final ThreadLocalValue<java.lang.Object> INJECTED
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NULL
private static final Value NULL
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NONE
private static final java.lang.Object[] NONE
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EMPTY_LIST
public static final java.util.List<Value<?>> EMPTY_LIST
The empty value list.
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EMPTY_TYPE_LIST
public static final java.util.List<? extends Value<java.lang.Class<?>>> EMPTY_TYPE_LIST
The empty value type list.
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EMPTY_LIST_VALUE
private static final Value EMPTY_LIST_VALUE
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Method Detail
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getValues
private static <T> T[] getValues(java.util.Iterator<? extends Value<? extends T>> i, java.lang.Class<T> clazz, int idx)
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arrayOf
private static <T> T[] arrayOf(java.lang.Class<T> clazz, int len)
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getValues
private static java.lang.Object[] getValues(java.util.Iterator<? extends Value<?>> i, int idx)
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getValues
public static java.lang.Object[] getValues(java.lang.Iterable<? extends Value<?>> i)
Get an object array from the result of an iterable series of values.- Parameters:
i
- the iterable series- Returns:
- the values array
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getValues
public static <T> T[] getValues(java.lang.Iterable<? extends Value<? extends T>> i, java.lang.Class<T> clazz)
Get a typed object array from the result of an iterable series of values.- Parameters:
i
- the iterable seriesclazz
- the resultant array type- Returns:
- the values array
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getValues
public static <T> T[] getValues(java.lang.Iterable<? extends Value<? extends T>> i, T[] array)
Get a typed object array from the result of an iterable series of values.- Parameters:
i
- the iterable seriesarray
- the array to populate- Returns:
- the values array
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nullValue
public static <T> Value<T> nullValue()
Get the null value.- Type Parameters:
T
- the value type- Returns:
- a value which always yields
null
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cached
public static <T> Value<T> cached(Value<T> value)
Get a cached value for some opaque value. If the value is already cached, it is returned as-is.- Type Parameters:
T
- the value type- Parameters:
value
- the value to wrap- Returns:
- a cached value
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emptyList
public static <T> java.util.List<Value<? extends T>> emptyList()
The empty value list.- Type Parameters:
T
- the value type- Returns:
- the empty value list
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immediateValue
public static <T> Value<T> immediateValue(T value)
Get an immediate value.- Type Parameters:
T
- the value type- Parameters:
value
- the value to return- Returns:
- the immediate value
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emptyListValue
public static <T> Value<java.util.List<T>> emptyListValue()
A value which yields the empty list.- Type Parameters:
T
- the list member type- Returns:
- the empty list value
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immediateValues
public static <T> java.util.List<Value<? extends T>> immediateValues(java.util.List<T> values)
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immediateValues
public static <T> java.util.List<Value<? extends T>> immediateValues(T... values)
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asSuperclass
public static <T> Value<T> asSuperclass(Value<? extends T> value)
Safely re-cast a value as its superclass.- Type Parameters:
T
- the value type- Parameters:
value
- the value to re-cast- Returns:
- the value
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thisValue
public static ThreadLocalValue<java.lang.Object> thisValue()
The special value representingthis
(the object being invoked upon).- Returns:
- the value for
this
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injectedValue
public static ThreadLocalValue<java.lang.Object> injectedValue()
The special value representing the value of an injection operation.- Returns:
- the target value
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