Module openj9.dtfj

Package com.ibm.dtfj.corereaders.zos.util

Class ObjectMap

java.lang.Object

com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

com.ibm.dtfj.corereaders.zos.util.ObjectMap

All Implemented Interfaces:

Serializable

public final class ObjectMap
extends AbstractHashMap

This is a simple class to map an integer key to an object value. It has a smaller footprint than the various standard Java classes owing to the use of open addressing (see description of AbstractHashMap).

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ObjectMap()

Method Summary

Modifier and Type	Method	Description
Object	get(long key)	Returns the value mapped by the given key.
void	put(long key, Object value)	Add the key/value pair to the map.
Object	remove(long key)	Remove the key from the map and return the old value.
Object[]	toArray(Object[] a)	Returns an array containing the values where the returned runtime array type is derived from the given array (or the given array is simply reused if there is room).

Methods declared in class com.ibm.dtfj.corereaders.zos.util.AbstractHashMap

getKeys, getKeysArray

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ObjectMap

public ObjectMap()

Method Details

get

public Object get(long key)

Returns the value mapped by the given key.

Returns:

the value or null if it cannot be found

put

public void put(long key,
 Object value)

Add the key/value pair to the map.

remove

public Object remove(long key)

Remove the key from the map and return the old value.

toArray

public Object[] toArray(Object[] a)

Returns an array containing the values where the returned runtime array type is derived from the given array (or the given array is simply reused if there is room).