NamespaceBuilder (Dataflow Library Distribution Project 7.0.3-11 API)

java.lang.Object
- com.pervasive.datarush.namespace.NamespaceBuilder<T>

Type Parameters:

T - the type of object stored in the namespace

All Implemented Interfaces:

Iterable<T>
```
public class NamespaceBuilder<T>
extends Object
implements Iterable<T>
```
A mutable implementation of a Namespace.

Field Summary

Fields
Modifier and Type	Field and Description
`static CollisionPolicy<?>`	`FAIL_ON_COLLISION` Predefined collision policy throwing a DRException on a name collision.
`static NamingPolicy<?>`	`NO_DEFAULT_NAME` Predefined name generation policy throwing an exception.
`static CollisionPolicy<?>`	`RENAME_SEQUENTIALLY` Predefined collision policy retrying the name binding with a new name.
`static CollisionPolicy<?>`	`REPLACE_ON_COLLISION` Predefined collision policy replacing the existing entry on a name collision.

Constructor Summary

Constructors
Constructor and Description
`NamespaceBuilder()` Creates a new mutable namespace with collisions causing an error and no default name generation.
`NamespaceBuilder(CollisionPolicy<T> onCollision)` Creates a new mutable namespace with the specified collision policy and no default name generation.
`NamespaceBuilder(CollisionPolicy<T> onCollision, NamingPolicy<T> defaultNaming)` Creates a new mutable namespace with the specified collision and name generation policies.
`NamespaceBuilder(NamingPolicy<T> defaultNaming)` Creates a new mutable namespace with collisions causing an error and the specified name generation policy.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`String`	`add(String name, T entry)` Adds an entry to the name space, associated with the given name.
`String`	`add(T entry)` Add an entry to the namespace.
`void`	`addAll(Namespace<T> entries)` Add all entries from a namespace into this namespace.
`void`	`clear()` Removes all entries from the namespace.
`T`	`get(int i)` Gets the entry at the specified index.
`T`	`get(String name)` Gets the entry associated with the specified namefrom the namespace.
`NameBinding<T>`	`getBinding(int i)` Gets the name-entry association at the specified index.
`List<NameBinding<T>>`	`getBindings()` Gets a collection of all the name-entry associations.
`String`	`getName(int i)` Gets the name associated with entry at the specified index.
`String[]`	`getNames()` Gets all names registered in the namespace.
`int`	`indexOf(String name)` Gets the index of the entry associated with the given name.
`boolean`	`isEmpty()` Indicates whether the namespace is empty.
`Iterator<T>`	`iterator()`
`Set<String>`	`nameSet()` Get an unmodifiable collection of all names.
`T`	`remove(String name)` Removes an entry from the namespace.
`static <T> NamespaceBuilder<T>`	`sequencedNamespace()` Gets a mutable namespace with no default naming policy.
`static <T> NamespaceBuilder<T>`	`sequencedNamespace(NamingPolicy<T> defaultNaming)` Gets a mutable namespace using the specified default naming policy.
`void`	`setListener(BindListener<T> listener)` Attaches a listener for namespace entry assignment events.
`int`	`size()` Retrieves the number of elements in the namespace.
`Namespace<T>`	`toNamespace()` Constructs the currently defined namespace.
`String`	`toString()`
`static <T> NamespaceBuilder<T>`	`uniqueNamespace()` Gets a mutable namespace with no default naming policy.
`static <T> NamespaceBuilder<T>`	`uniqueNamespace(NamingPolicy<T> defaultNaming)` Gets a mutable namespace using the specified default naming policy.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- Field Detail
  - FAIL_ON_COLLISION
```
public static final CollisionPolicy<?> FAIL_ON_COLLISION
```
    Predefined collision policy throwing a DRException on a name collision.
  - REPLACE_ON_COLLISION
```
public static final CollisionPolicy<?> REPLACE_ON_COLLISION
```
    Predefined collision policy replacing the existing entry on a name collision.
  - RENAME_SEQUENTIALLY
```
public static final CollisionPolicy<?> RENAME_SEQUENTIALLY
```
    Predefined collision policy retrying the name binding with a new name. The original name is repeatedly suffixed with an increasing number until a collision no longer exists.
  - NO_DEFAULT_NAME
```
public static final NamingPolicy<?> NO_DEFAULT_NAME
```
    Predefined name generation policy throwing an exception. If used, the add(Object) method will always fail.
- Constructor Detail
  - NamespaceBuilder
```
public NamespaceBuilder()
```
    Creates a new mutable namespace with collisions causing an error and no default name generation.
  - NamespaceBuilder
```
public NamespaceBuilder(CollisionPolicy<T> onCollision)
```
    Creates a new mutable namespace with the specified collision policy and no default name generation.
    
    Parameters:
    
    onCollision - the collision policy to use in the namespace
  - NamespaceBuilder
```
public NamespaceBuilder(NamingPolicy<T> defaultNaming)
```
    Creates a new mutable namespace with collisions causing an error and the specified name generation policy.
    
    Parameters:
    
    defaultNaming - the name generation strategy to use in the namespace
  - NamespaceBuilder
```
public NamespaceBuilder(CollisionPolicy<T> onCollision,
                        NamingPolicy<T> defaultNaming)
```
    Creates a new mutable namespace with the specified collision and name generation policies.
    
    Parameters:
    
    onCollision - the collision policy to use in the namespace
    
    defaultNaming - the name generation strategy to use in the namespace
- Method Detail
  - uniqueNamespace
```
public static <T> NamespaceBuilder<T> uniqueNamespace()
```
    Gets a mutable namespace with no default naming policy. An error is raised on name collisions; see FAIL_ON_COLLISION.
    
    Type Parameters:
    
    T - the type of elements in the namespace
    
    Returns:
    
    a builder for constructing a namespace
  - uniqueNamespace
```
public static <T> NamespaceBuilder<T> uniqueNamespace(NamingPolicy<T> defaultNaming)
```
    Gets a mutable namespace using the specified default naming policy. An error is raised on name collisions; see FAIL_ON_COLLISION.
    
    Type Parameters:
    
    T - the type of elements in the namespace
    
    Parameters:
    
    defaultNaming - the naming policy to use when adding elements without a name
    
    Returns:
    
    a builder for constructing a namespace
  - sequencedNamespace
```
public static <T> NamespaceBuilder<T> sequencedNamespace()
```
    Gets a mutable namespace with no default naming policy. Collisions are resolved by appending a sequence number; see RENAME_SEQUENTIALLY.
    
    Type Parameters:
    
    T - the type of elements in the namespace
    
    Returns:
    
    a builder for constructing a namespace
  - sequencedNamespace
```
public static <T> NamespaceBuilder<T> sequencedNamespace(NamingPolicy<T> defaultNaming)
```
    Gets a mutable namespace using the specified default naming policy. Collisions are resolved by appending a sequence number; see RENAME_SEQUENTIALLY.
    
    Type Parameters:
    
    T - the type of elements in the namespace
    
    Parameters:
    
    defaultNaming - the naming policy to use when adding elements without a name
    
    Returns:
    
    a builder for constructing a namespace
  - setListener
```
public void setListener(BindListener<T> listener)
```
    Attaches a listener for namespace entry assignment events. Only one listener at a time is supported; if a listener already exists, it will stop receiving events.
    
    Parameters:
    
    listener - the listener to attach
  - size
```
public final int size()
```
    Retrieves the number of elements in the namespace.
    
    Returns:
    
    the count of elements
  - isEmpty
```
public final boolean isEmpty()
```
    Indicates whether the namespace is empty. This is equivalent to checking size() == 0.
    
    Returns:
    
    true if empty, false otherwise
  - add
```
public String add(T entry)
```
    Add an entry to the namespace. A name will be generated using the default naming policy. Name collisions are handled according to the collision policy in effect.
    
    Parameters:
    
    entry - the value to add to the namespace
    
    Returns:
    
    the name assigned to the entry.
    
    Throws:
    
    DRException - if one of the namespace policies is violated
  - add
```
public String add(String name,
                  T entry)
```
    Adds an entry to the name space, associated with the given name. Name collisions are handled according to the collision policy in effect.
    
    Parameters:
    
    name - the name to associate with the entry
    
    entry - the value to add to the namespace
    
    Returns:
    
    the actual name associated with the entry. For some collision policies, this may be different than the supplied name.
    
    Throws:
    
    DRException - if one of the namespace policies is violated
  - addAll
```
public void addAll(Namespace<T> entries)
```
    Add all entries from a namespace into this namespace. The given namespace is not modified. Name collisions are handled according to the collision policy in effect.
    
    Parameters:
    
    entries - source of namespace entries to add
    
    Throws:
    
    DRException - if one of the namespace policies is violated. No guarantee is made about the contents of the namespace if this occurs.
  - clear
```
public void clear()
```
    Removes all entries from the namespace.
  - get
```
public T get(int i)
```
    Gets the entry at the specified index. Indexing is based on the order in which the entries were added to the namespace.
    
    Parameters:
    
    i - index of the element to retrieve
    
    Returns:
    
    the ith entry inserted into the namespace
    
    Throws:
    
    IndexOutOfBoundsException - if i < 0 || i >= size()
  - getBinding
```
public NameBinding<T> getBinding(int i)
```
    Gets the name-entry association at the specified index. Indexing is based on the order in which the entries were added to the namespace.
    
    Parameters:
    
    i - index of the element to retrieve
    
    Returns:
    
    the ith name-entry binding in the namespace
    
    Throws:
    
    IndexOutOfBoundsException - if i < 0 || i >= size()
  - indexOf
```
public int indexOf(String name)
```
    Gets the index of the entry associated with the given name.
    
    Parameters:
    
    name - the name of the entry to find
    
    Returns:
    
    the index of the matching entry, -1 if no entry with the given name exists
  - get
```
public T get(String name)
```
    Gets the entry associated with the specified namefrom the namespace.
    
    Parameters:
    
    name - the name of the entry to find
    
    Returns:
    
    the associated entry, or null if there is no such entry
  - remove
```
public T remove(String name)
```
    Removes an entry from the namespace.
    
    Parameters:
    
    name - the name of the entry to remove
    
    Returns:
    
    the entry with the specified name, null if there is no such entry
  - iterator
```
public Iterator<T> iterator()
```
    Specified by:
    
    iterator in interface Iterable<T>
  - getName
```
public String getName(int i)
```
    Gets the name associated with entry at the specified index. Indexing is based on the order in which the entries were added to the namespace.
    
    Parameters:
    
    i - index of the element name to retrieve
    
    Returns:
    
    the name of the ith entry inserted into the namespace
    
    Throws:
    
    IndexOutOfBoundsException - if i < 0 || i >= size()
  - getNames
```
public String[] getNames()
```
    Gets all names registered in the namespace. The names are ordered according to the order in which the entries were added.
    
    Returns:
    
    the namespace's registered names
  - nameSet
```
public Set<String> nameSet()
```
    Get an unmodifiable collection of all names. The order of entries when iterating over the set does not preserve the order in the namespace.
    
    Returns:
    
    the set of the namespace's registered names
  - getBindings
```
public List<NameBinding<T>> getBindings()
```
    Gets a collection of all the name-entry associations. The ordering of the result is the same as that of the namespace.
    
    Returns:
    
    a list of bindings in the namespace
  - toNamespace
```
public Namespace<T> toNamespace()
```
    Constructs the currently defined namespace.
    
    Returns:
    
    the namespace
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class NamespaceBuilder<T>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Iterable

Field Detail

FAIL_ON_COLLISION

REPLACE_ON_COLLISION

RENAME_SEQUENTIALLY

NO_DEFAULT_NAME

Constructor Detail

NamespaceBuilder

NamespaceBuilder

NamespaceBuilder

NamespaceBuilder

Method Detail

uniqueNamespace

uniqueNamespace

sequencedNamespace

sequencedNamespace

setListener

size

isEmpty

add

add

addAll

clear

get

getBinding

indexOf

get

remove

iterator

getName

getNames

nameSet

getBindings

toNamespace

toString