Added in API level 31

Summary: Ctors | Methods | Inherited Methods

ConstrainedFieldPosition

Kotlin |Java

public class ConstrainedFieldPosition
extends Object

java.lang.Object
↳	android.icu.text.ConstrainedFieldPosition

Represents a span of a string containing a given field. This class differs from FieldPosition in the following ways: 1. It has information on the field category. 2. It allows you to set constraints to use when iterating over field positions. 3. It is used for the newer FormattedValue APIs.

Summary

Public constructors
`ConstrainedFieldPosition()` Initializes a CategoryFieldPosition.

Public methods
`void`	`constrainClass(Class<?> classConstraint)` Sets a constraint on the field class.
`void`	`constrainField(Format.Field field)` Sets a constraint on the field.
`Format.Field`	`getField()` Gets the field for the current position.
`Object`	`getFieldValue()` Gets the value associated with the current field position.
`long`	`getInt64IterationContext()` Gets an int64 that FormattedValue implementations may use for storage.
`int`	`getLimit()` Gets the EXCLUSIVE end index stored for the current position.
`int`	`getStart()` Gets the INCLUSIVE start index for the current position.
`boolean`	`matchesField(Format.Field field, Object fieldValue)` Determines whether a given field and value should be included given the constraints.
`void`	`reset()` Resets this ConstrainedFieldPosition to its initial state, as if it were newly created: - Removes any constraints that may have been set on the instance.
`void`	`setInt64IterationContext(long context)` Sets an int64 that FormattedValue implementations may use for storage.
`void`	`setState(Format.Field field, Object value, int start, int limit)` Sets new values for the primary public getters.
`String`	`toString()` Returns a string representation of the object.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

ConstrainedFieldPosition

Added in API level 31

public ConstrainedFieldPosition ()

Initializes a CategoryFieldPosition. By default, the CategoryFieldPosition has no iteration constraints.

Public methods

constrainClass

Added in API level 31

public void constrainClass (Class<?> classConstraint)

Sets a constraint on the field class. When this instance of ConstrainedFieldPosition is passed to FormattedValue.nextPosition, positions are skipped unless the field is an instance of the class constraint, including subclasses. Any previously set constraints are cleared. For example, to loop over only the number-related fields:

 ConstrainedFieldPosition cfpos;
 cfpos.constrainClass(NumberFormat.Field.class);
 while (fmtval.nextPosition(cfpos)) {
   // handle the number-related field position
 }

Parameters
`classConstraint`	`Class`: The field class to fix when iterating.

constrainField

Added in API level 31

public void constrainField (Format.Field field)

Sets a constraint on the field. When this instance of ConstrainedFieldPosition is passed to FormattedValue.nextPosition, positions are skipped unless they have the given field. Any previously set constraints are cleared. For example, to loop over all grouping separators:

 ConstrainedFieldPosition cfpos;
 cfpos.constrainField(NumberFormat.Field.GROUPING_SEPARATOR);
 while (fmtval.nextPosition(cfpos)) {
   // handle the grouping separator position
 }

Changing the constraint while in the middle of iterating over a FormattedValue does not generally have well-defined behavior.

Parameters
`field`	`Format.Field`: The field to fix when iterating.

getField

Added in API level 31

public Format.Field getField ()

Gets the field for the current position. The return value is well-defined and non-null only after FormattedValue#nextPosition returns true.

Returns
`Format.Field`	The field saved in the instance. See above for null conditions.

getFieldValue

Added in API level 31

public Object getFieldValue ()

Gets the value associated with the current field position. The field value is often not set. The return value is well-defined only after FormattedValue#nextPosition returns true.

Returns
`Object`	The value for the current position. Might be null.

getInt64IterationContext

Added in API level 31

public long getInt64IterationContext ()

Gets an int64 that FormattedValue implementations may use for storage. The initial value is zero. Users of FormattedValue should not need to call this method.

Returns
`long`	The current iteration context from `setInt64IterationContext(long)`.

getLimit

Added in API level 31

public int getLimit ()

Gets the EXCLUSIVE end index stored for the current position. The return value is well-defined only after FormattedValue#nextPosition returns true.

Returns
`int`	The end index saved in the instance.

getStart

Added in API level 31

public int getStart ()

Gets the INCLUSIVE start index for the current position. The return value is well-defined only after FormattedValue#nextPosition returns true.

Returns
`int`	The start index saved in the instance.

matchesField

Added in API level 31

public boolean matchesField (Format.Field field, 
                Object fieldValue)

Determines whether a given field and value should be included given the constraints. Intended to be used by FormattedValue implementations.

Parameters
`field`	`Format.Field`: The field to test.
`fieldValue`	`Object`: The field value to test. Should be null if there is no value.

Returns
`boolean`	Whether the field should be included given the constraints.

reset

Added in API level 31

public void reset ()

Resets this ConstrainedFieldPosition to its initial state, as if it were newly created: - Removes any constraints that may have been set on the instance. - Resets the iteration position.

setInt64IterationContext

Added in API level 31

public void setInt64IterationContext (long context)

Sets an int64 that FormattedValue implementations may use for storage. Intended to be used by FormattedValue implementations.

Parameters
`context`	`long`: The new iteration context.

setState

Added in API level 31

public void setState (Format.Field field, 
                Object value, 
                int start, 
                int limit)

Sets new values for the primary public getters. Intended to be used by FormattedValue implementations. It is up to the implementation to ensure that the user-requested constraints are satisfied. This method does not check!

Parameters
`field`	`Format.Field`: The new field.
`value`	`Object`: The new field value. Should be null if there is no value.
`start`	`int`: The new inclusive start index.
`limit`	`int`: The new exclusive end index.

toString

Added in API level 31

public String toString ()

Returns a string representation of the object.

Returns
`String`	a string representation of the object.