Package org.eclipse.jgit.util
Class RefMap
- java.lang.Object
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- java.util.AbstractMap<java.lang.String,Ref>
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- org.eclipse.jgit.util.RefMap
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- All Implemented Interfaces:
java.util.Map<java.lang.String,Ref>
public class RefMap extends java.util.AbstractMap<java.lang.String,Ref>
Specialized Map to present aRefDatabase
namespace.Although not declared as a
SortedMap
, iterators from this map's projections always return references inRefComparator
ordering. The map's internal representation is a sorted array ofRef
objects, which means lookup and replacement is O(log N), while insertion and removal can be as expensive as O(N + log N) while the list expands or contracts. Since this is not a general map implementation, all entries must be keyed by the reference name.This class is really intended as a helper for
RefDatabase
, which needs to perform a merge-join of three sortedRefList
s in order to present the unified namespace of the packed-refs file, the loose refs/ directory tree, and the resolved form of any symbolic references.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
containsKey(java.lang.Object name)
java.util.Set<java.util.Map.Entry<java.lang.String,Ref>>
entrySet()
Ref
get(java.lang.Object key)
boolean
isEmpty()
Ref
put(java.lang.String keyName, Ref value)
Ref
remove(java.lang.Object key)
java.lang.String
toString()
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Methods inherited from class java.util.AbstractMap
clear, clone, containsValue, equals, hashCode, keySet, putAll, size, values
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Constructor Detail
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RefMap
public RefMap()
Construct an empty map with a small initial capacity.
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RefMap
public RefMap(java.lang.String prefix, RefList<? extends Ref> packed, RefList<? extends Ref> loose, RefList<? extends Ref> resolved)
Construct a map to merge 3 collections together.- Parameters:
prefix
- prefix used to slice the lists down. Only references whose names start with this prefix will appear to reside in the map. Must not be null, use""
(the empty string) to select all list items.packed
- items from the packed reference list, this is the last list searched.loose
- items from the loose reference list, this list overridespacked
if a name appears in both.resolved
- resolved symbolic references. This list overrides the prior listloose
, if an item appears in both. Items in this list must also appear inloose
.
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Method Detail
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containsKey
public boolean containsKey(java.lang.Object name)
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get
public Ref get(java.lang.Object key)
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remove
public Ref remove(java.lang.Object key)
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isEmpty
public boolean isEmpty()
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entrySet
public java.util.Set<java.util.Map.Entry<java.lang.String,Ref>> entrySet()
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.util.AbstractMap<java.lang.String,Ref>
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