Package javax.ws.rs.core

Class AbstractMultivaluedMap<K,​V>

  • Type Parameters:
    K - the type of keys maintained by this map.
    V - the type of mapped values.
    All Implemented Interfaces:
    Map<K,​List<V>>, MultivaluedMap<K,​V>
    Direct Known Subclasses:
    MultivaluedHashMap
    public abstract class AbstractMultivaluedMap<K,​V>
extends Object
implements MultivaluedMap<K,​V>
    Abstract skeleton implementation of a MultivaluedMap that is backed by a [key, multi-value] store represented as a Map<K, List<V>>.
    Author:
    Marek Potociar

    • Field Detail

      • store

        protected final Map<K,​List<V>> store
        Backing store for the [key, multi-value] pairs.

    • Constructor Detail

      • AbstractMultivaluedMap

        public AbstractMultivaluedMap​(Map<K,​List<V>> store)
        Initialize the backing store in the abstract parent multivalued map implementation.
        Parameters:
        store - the backing Map to be used as a [key, multi-value] store. Must not be null.
        Throws:
        NullPointerException - in case the underlying store parameter is null.

    • Method Detail

      • putSingle

        public final void putSingle​(K key,
                            V value)
        Set the value for the key to be a one item list consisting of the supplied value. Any existing values will be replaced.

        NOTE: This implementation ignores null values; A supplied value of null is ignored and not added to the purged value list. As a result of such operation, empty value list would be registered for the supplied key. Overriding implementations may modify this behavior by redefining the addNull(java.util.List) method.

        Specified by:
        putSingle in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key
        value - the single value of the key. If the value is null it will be ignored.

      • addNull

        protected void addNull​(List<V> values)
        Define the behavior for adding a null values to the value list.

        Default implementation is a no-op, i.e. the null values are ignored. Overriding implementations may modify this behavior by providing their own definitions of this method.

        Parameters:
        values - value list where the null value addition is being requested.

      • addFirstNull

        protected void addFirstNull​(List<V> values)
        Define the behavior for adding a null values to the first position in the value list.

        Default implementation is a no-op, i.e. the null values are ignored. Overriding implementations may modify this behavior by providing their own definitions of this method.

        Parameters:
        values - value list where the null value addition is being requested.

      • add

        public final void add​(K key,
                      V value)
        Add a value to the current list of values for the supplied key.

        NOTE: This implementation ignores null values; A supplied value of null is ignored and not added to the value list. Overriding implementations may modify this behavior by redefining the addNull(java.util.List) method.

        Specified by:
        add in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key
        value - the value to be added.

      • addAll

        public final void addAll​(K key,
                         V... newValues)
        Add multiple values to the current list of values for the supplied key. If the supplied array of new values is empty, method returns immediately. Method throws a NullPointerException if the supplied array of values is null.

        NOTE: This implementation ignores null values; Any of the supplied values of null is ignored and not added to the value list. Overriding implementations may modify this behavior by redefining the addNull(java.util.List) method.

        Specified by:
        addAll in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key.
        newValues - the values to be added.
        Throws:
        NullPointerException - if the supplied array of new values is null.

      • addAll

        public final void addAll​(K key,
                         List<V> valueList)
        Add all the values from the supplied value list to the current list of values for the supplied key. If the supplied value list is empty, method returns immediately. Method throws a NullPointerException if the supplied array of values is null.

        NOTE: This implementation ignores null values; Any null value in the supplied value list is ignored and not added to the value list. Overriding implementations may modify this behavior by redefining the addNull(java.util.List) method.

        Specified by:
        addAll in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key.
        valueList - the list of values to be added.
        Throws:
        NullPointerException - if the supplied value list is null.

      • getFirst

        public final V getFirst​(K key)
        Description copied from interface: MultivaluedMap
        A shortcut to get the first value of the supplied key.
        Specified by:
        getFirst in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key
        Returns:
        the first value for the specified key or null if the key is not in the map.

      • addFirst

        public final void addFirst​(K key,
                           V value)
        Add a value to the first position in the current list of values for the supplied key.

        NOTE: This implementation ignores null values; A supplied value of null is ignored and not added to the purged value list. Overriding implementations may modify this behavior by redefining the addFirstNull(java.util.List) method.

        Specified by:
        addFirst in interface MultivaluedMap<K,​V>
        Parameters:
        key - the key
        value - the value to be added.

      • getValues

        protected final List<V> getValues​(K key)
        Return a non-null list of values for a given key. The returned list may be empty.

        If there is no entry for the key in the map, a new empty List instance is created, registered within the map to hold the values of the key and returned from the method.

        Parameters:
        key - the key.
        Returns:
        value list registered with the key. The method is guaranteed to never return null.

      • hashCode

        public int hashCode()

        This implementation delegates the method call to to the the underlying [key, multi-value] store.

        Specified by:
        hashCode in interface Map<K,​V>
        Overrides:
        hashCode in class Object
        Returns:
        a hash code value for the underlying [key, multi-value] store.

      • equals

        public boolean equals​(Object o)

        This implementation delegates the method call to to the the underlying [key, multi-value] store.

        Specified by:
        equals in interface Map<K,​V>
        Overrides:
        equals in class Object
        Returns:
        true if the specified object is equal to the underlying [key, multi-value] store, false otherwise.

      • size

        public int size()
        Specified by:
        size in interface Map<K,​V>

      • putAll

        public void putAll​(Map<? extends K,​? extends List<V>> m)
        Specified by:
        putAll in interface Map<K,​V>

      • put

        public List<V> put​(K key,
                   List<V> value)
        Specified by:
        put in interface Map<K,​V>

      • keySet

        public Set<K> keySet()
        Specified by:
        keySet in interface Map<K,​V>

      • isEmpty

        public boolean isEmpty()
        Specified by:
        isEmpty in interface Map<K,​V>

      • containsKey

        public boolean containsKey​(Object key)
        Specified by:
        containsKey in interface Map<K,​V>

      • clear

        public void clear()
        Specified by:
        clear in interface Map<K,​V>

      • equalsIgnoreValueOrder

        public boolean equalsIgnoreValueOrder​(MultivaluedMap<K,​V> omap)
        Description copied from interface: MultivaluedMap
        Compare the specified map with this map for equality modulo the order of values for each key. Specifically, the values associated with each key are compared as if they were ordered lists.
        Specified by:
        equalsIgnoreValueOrder in interface MultivaluedMap<K,​V>
        Parameters:
        omap - map to be compared to this one.
        Returns:
        true if the maps are equal modulo value ordering.