Package org.apache.sis.util.collection

package org.apache.sis.util.collection

Addition to the collection framework. Most classes in this package implement interfaces from the Java Collection Framework defined in the java.util package.

• WeakHashSet provides a way to ensure that a factory returns unique instances for all values that are equal in the sense of Objects.deepEquals(Object, Object). The values that were created in previous factory operations are retained by weak references for reuse.
• Cache and WeakValueHashMap are java.util.Map implementations that may be used for some caching or pseudo-caching functionalities. The Cache implementation is the most full-featured one and supports concurrency, while the other implementations are more lightweight, sometimes thread-safe but without concurrency support.
• Derived Map and derived Set are wrapper collections in which the keys or the values are derived on-the-fly from the content of another collection. The can also be used for creating filtered views.
• IntegerList, CodeListSet and RangeSet are collections specialized for a particular kind of content, providing more efficient storage than what we would get with the general-purpose collection implementations.
• FrequencySortedSet provides specialized ways to organize its elements.

Since:

0.3

Version:

1.3

Related Packages

Package	Description
org.apache.sis.util	Simple data objects and miscellaneous utilities.
org.apache.sis.util.iso	Implementations of GeoAPI types from the org.opengis.util package.
org.apache.sis.util.logging	Extensions to the JDK logging framework.
org.apache.sis.util.resources	Localized resources for SIS.

Class	Description
BackingStoreException	Thrown to indicate that an operation could not complete because of a failure in the backing store (a file or a database).
Cache<K,V>	A concurrent map capable to locks entries for which the value is in process of being computed.
Cache.Deferred<K,V>	Key-value pairs of new entries created during Cache.ReplaceAdapter execution, as a chained list.
Cache.Handler<V>	The handler returned by Cache.lock(K), to be used for unlocking and storing the result.
CacheEntries<K,V>	The set of entries in the Cache.map.
CacheEntries.Iter<K,V>	An iterator over the entries in the Cache.map.
CheckedContainer<E>	A container that ensures that all elements are assignable to a given base type.
CodeListSet<E extends org.opengis.util.CodeList<E>>	A specialized Set implementation for use with CodeList values.
Containers	Static methods working on Collection or CheckedContainer objects.
DefaultTreeTable	A TreeTable implementation with a list of columns given at construction time.
DefaultTreeTable.Node	A TreeTable.Node implementation which can store values for a predefined list of columns.
DefaultTreeTable.Node.Children	Implementation of DefaultTreeTable.Node children list.
DerivedIterator<S,E>	An iterator which performs conversions on the fly using the given converter.
DerivedMap<SK,SV,K,V>	A map whose keys and values are derived on-the-fly from another map.
DerivedMap.Invertible<SK,SV,K,V>	A DerivedMap used when both the DerivedMap.keyConverter and DerivedMap.valueConverter are invertible.
DerivedMap.InvertibleKey<SK,SV,K,V>	A DerivedMap used when the DerivedMap.keyConverter is invertible.
DerivedMap.InvertibleValue<SK,SV,K,V>	A DerivedMap used when the DerivedMap.valueConverter is invertible.
DerivedSet<S,E>	A set whose values are derived on-the-fly from another set.
DerivedSet.Bijective<S,E>	A DerivedSet for converters that are both invertible and bijective.
DerivedSet.Invertible<S,E>	A DerivedSet for invertible converters.
FrequencySortedSet<E>	A set with elements ordered by the amount of time they were added.
IntegerList	A list of unsigned integer values.
RangeSet<E extends Comparable<? super E>>	An ordered set of disjoint ranges where overlapping ranges are merged.
RangeSet.Compare<E extends Comparable<? super E>>	The range comparator returned by RangeSet.comparator().
RangeSet.Numeric<E extends Number & Comparable<? super E>>	A RangeSet implementation for NumberRange elements.
TableColumn<V>	Identifies a column in TreeTable.Node instances.
TableColumn.Constant<V>	Implementation of TableColumn for the predefined constants.
TreeNodeList	A list of children in a TreeTable.Node.
TreeTable	Defines the structure (list of columns) of a table and provides the root of the tree containing the data.
TreeTable.Node	A node in a tree combined with a row in a table.
TreeTableFormat	A parser and formatter for TreeTable instances.
TreeTables	Static methods working on TreeTable objects and their nodes.
WeakEntry<E>	A weak reference to an element in a WeakHashSet or WeakValueHashMap.
WeakHashSet<E>	A set of objects hold by weak references.
WeakValueHashMap<K,V>	A hashtable-based map implementation that uses weak references, leaving memory when an entry is not used anymore.
WeakValueHashMap.Wildcard	Wildcard for WeakValueHashMap.intern(Object, Object, Object) condition meaning whether a key shall be associated to a value or not.