Indexer

java.lang.Object
- edu.berkeley.nlp.lm.collections.Indexer<E>

All Implemented Interfaces:

java.io.Serializable
```
public class Indexer<E extends java.lang.Comparable<E>>
extends java.lang.Object
implements java.io.Serializable
```
Maintains a two-way map between a set of objects and contiguous integers from 0 to the number of objects.

Author:

Dan Klein, Adam Pauls

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field Description

protected TIntMap<E> indexes

protected boolean locked

protected java.util.ArrayList<E> objects

Constructor Summary

Constructors
Constructor Description

Indexer()

Indexer(boolean sync)

Indexer(java.util.Collection<? extends E> c)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`add(E elem)`
`int`	`getIndex(E e)`	Return the index of the element If doesn't exist, add it.
`E`	`getObject(int index)`
`java.lang.Iterable<E>`	`getObjects()`
`int`	`indexOf(E o)`	Returns the index of the given object, or -1 if the object is not present in the indexer.
`void`	`lock()`
`int`	`size()`	Returns the number of objects indexed.
`void`	`trim()`	Save some space my compacting underlying maps and lists.

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

Field Detail

objects

protected java.util.ArrayList<E extends java.lang.Comparable<E>> objects

indexes

protected TIntMap<E extends java.lang.Comparable<E>> indexes

locked
```
protected boolean locked
```

Constructor Detail

Indexer
```
public Indexer(boolean sync)
```

Indexer
```
public Indexer()
```

Indexer

public Indexer(java.util.Collection<? extends E> c)

Method Detail
- lock
```
public void lock()
```
- getObject
```
public E getObject(int index)
```
- add
```
public boolean add(E elem)
```
- size
```
public int size()
```
  Returns the number of objects indexed.
- indexOf
```
public int indexOf(E o)
```
  Returns the index of the given object, or -1 if the object is not present in the indexer.
  
  Parameters:
  
  o -
  
  Returns:
- getIndex
```
public int getIndex(E e)
```
  Return the index of the element If doesn't exist, add it.
- trim
```
public void trim()
```
  Save some space my compacting underlying maps and lists.
- getObjects
```
public java.lang.Iterable<E> getObjects()
```