public class OverlayMap
extends java.util.AbstractMap
Overlap one map onto another. This allows you to have a map with local values and default values. The local and default values are provided by a child and parent map.
Constructor and Description |
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OverlayMap(java.util.Map parent)
Build a new map with default key-value pairs.
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OverlayMap(java.util.Map parent,
java.util.Map overlay)
Build a new map with default key-value pairs.
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Modifier and Type | Method and Description |
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boolean |
containsKey(java.lang.Object key) |
java.util.Set |
entrySet() |
java.lang.Object |
get(java.lang.Object key) |
java.util.Map |
getOverlayMap()
Return the object containing the overlay mappings.
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java.util.Map |
getParentMap()
Return the object containing the fallback mappings.
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java.util.Set |
keySet() |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object value) |
clear, clone, containsValue, equals, hashCode, isEmpty, putAll, remove, size, toString, values
public OverlayMap(java.util.Map parent, java.util.Map overlay)
parent
- the default fall-through Mapoverlay
- the overriding Mappublic OverlayMap(java.util.Map parent)
parent
- the default fall-through Mappublic java.util.Map getParentMap()
public java.util.Map getOverlayMap()
public java.lang.Object get(java.lang.Object key)
get
in interface java.util.Map
get
in class java.util.AbstractMap
public java.util.Set entrySet()
entrySet
in interface java.util.Map
entrySet
in class java.util.AbstractMap
public java.util.Set keySet()
keySet
in interface java.util.Map
keySet
in class java.util.AbstractMap
public boolean containsKey(java.lang.Object key)
containsKey
in interface java.util.Map
containsKey
in class java.util.AbstractMap
public java.lang.Object put(java.lang.Object key, java.lang.Object value)
put
in interface java.util.Map
put
in class java.util.AbstractMap