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java.lang.Objectprea.data.structure.DataMap<Key,Val>
public class DataMap<Key extends java.lang.Comparable<Key>,Val>
This is a class implementing HashMap-based data map. This data structure is used for implementing sparse vector and matrix.
Field Summary | |
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private java.util.HashMap<Key,Val> |
map
Key-value mapping structure |
Constructor Summary | |
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DataMap()
Basic constructor without specifying the capacity. |
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DataMap(int capacity)
A constructor specifying the capacity. |
Method Summary | |
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boolean |
contains(Key key)
Check whether the map has a specific key inside it. |
Val |
get(Key key)
Get a data value by the given key. |
int |
itemCount()
Count the number of elements in the map. |
java.util.Iterator<Key> |
iterator()
Get an iterator for the map. |
void |
put(Key key,
Val value)
Set a data value with the given key. |
Val |
remove(Key key)
Remove a data element with the given key. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private java.util.HashMap<Key extends java.lang.Comparable<Key>,Val> map
Constructor Detail |
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public DataMap()
public DataMap(int capacity)
Method Detail |
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public Val get(Key key)
key
- The key to search.
public void put(Key key, Val value)
key
- The key to set.value
- The data value associated with the given key.public Val remove(Key key)
key
- The key to remove.
public boolean contains(Key key)
key
- The key to search.
public java.util.Iterator<Key> iterator()
iterator
in interface java.lang.Iterable<Key extends java.lang.Comparable<Key>>
public int itemCount()
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