| java.lang.Object
 bak.pcj.map.AbstractShortKeyDoubleMap
bak.pcj.adapter.MapToShortKeyDoubleMapAdapter
| MapToShortKeyDoubleMapAdapter | | public class MapToShortKeyDoubleMapAdapter extends AbstractShortKeyDoubleMap implements ShortKeyDoubleMap(Code) | | This class represents adaptions of Java Collections Framework
maps to primitive maps from short values to double values.
The adapter is implemented as a wrapper around the map.
Thus, changes to the underlying map are reflected by this
map and vice versa.
Adapters from JCF maps to primitive map will
fail if the JCF collection contains null keys/values or
keys/values of the wrong class. However, adapters are not fast
failing in the case that the underlying map should
contain illegal keys or values. To implement fast failure would require
every operation to check every key and value of the underlying
map before doing anything. Instead validation methods
are provided. They can be called using the assertion facility
in the client code:
MapToShortKeyDoubleMapAdapter s;
...
assert s.validate();
or by letting the adapter throw an exception on illegal values:
MapToShortKeyDoubleMapAdapter s;
...
s.evalidate(); // Throws an exception on illegal values
Either way, validation must be invoked directly by the client
code.
author:
Søren Bak
version:
1.3 21-08-2003 19:09
since:
1.0 |
| Field Summary | |
| protected Double | lastValue
The value corresponding to the last key found by containsKey(). | | protected Map | map
The underlying map. |
| lastValue | | protected Double lastValue(Code) | | The value corresponding to the last key found by containsKey().
|
| map | | protected Map map(Code) | | The underlying map.
|
| MapToShortKeyDoubleMapAdapter | | public MapToShortKeyDoubleMapAdapter(Map map)(Code) | | Creates a new adaption to a map from short
values to double values.
Parameters:
map - the underlying map. This map mustconsist of keys of classShort Short.values of classDouble Double. Otherwise aClassCastException ClassCastExceptionwill be thrown by some methods.
throws:
NullPointerException - if map is null. |
| MapToShortKeyDoubleMapAdapter | | public MapToShortKeyDoubleMapAdapter(Map map, boolean validate)(Code) | | Creates a new adaption to a map from short
values to double values. The map to adapt is optionally validated.
Parameters:
map - the underlying map. This map mustconsist of keys of classShort Short.values of classDouble Double. Otherwise aClassCastException ClassCastExceptionwill be thrown by some methods.
Parameters:
validate - indicates whether map shouldbe checked for illegal values.
throws:
NullPointerException - if map is null.
throws:
IllegalStateException - if validate is true andmap contains a null key/value,a key that is not of classShort Short,or a value that is not of classDouble Double. |
| clear | | public void clear()(Code) | | |
| containsKey | | public boolean containsKey(short key)(Code) | | |
| containsValue | | public boolean containsValue(double value)(Code) | | |
| evalidate | | public void evalidate()(Code) | | Validates the map underlying this adapter and throws
an exception if it is invalid. For the underlying map
to be valid, it
can only contain
Short Short keys, no null
keys/values, and only
Double Double values.
throws:
IllegalStateException - if the underlying map is invalid. |
| get | | public double get(short key)(Code) | | |
| lget | | public double lget()(Code) | | |
| put | | public double put(short key, double value)(Code) | | |
| remove | | public double remove(short key)(Code) | | |
| tget | | public double tget(short key)(Code) | | |
| validate | | public boolean validate()(Code) | | Indicates whether the underlying map is valid for
this adapter. For the underlying map to be valid, it
can only contain
Short Short keys, no null
keys/values, and only
Double Double values.
true if the underlying map isvalid; returns false otherwise. |
|
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