Package org.apache.commons.collections.collection

Class UnmodifiableCollection

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Iterable, java.util.Collection, Unmodifiable
    public final class UnmodifiableCollection
extends AbstractSerializableCollectionDecorator
implements Unmodifiable
    Decorates another Collection to ensure it can't be altered.

    This class is Serializable from Commons Collections 3.1.

    Since:
    Commons Collections 3.0
    See Also:
    Serialized Form

    • Method Detail

      • decorate

        public static java.util.Collection decorate​(java.util.Collection coll)
        Factory method to create an unmodifiable collection.

        If the collection passed in is already unmodifiable, it is returned.

        Parameters:
        coll - the collection to decorate, must not be null
        Returns:
        an unmodifiable collection
        Throws:
        java.lang.IllegalArgumentException - if collection is null

      • iterator

        public java.util.Iterator iterator()
        Specified by:
        iterator in interface java.util.Collection
        Specified by:
        iterator in interface java.lang.Iterable
        Overrides:
        iterator in class AbstractCollectionDecorator

      • add

        public boolean add​(java.lang.Object object)
        Specified by:
        add in interface java.util.Collection
        Overrides:
        add in class AbstractCollectionDecorator

      • addAll

        public boolean addAll​(java.util.Collection coll)
        Specified by:
        addAll in interface java.util.Collection
        Overrides:
        addAll in class AbstractCollectionDecorator

      • remove

        public boolean remove​(java.lang.Object object)
        Specified by:
        remove in interface java.util.Collection
        Overrides:
        remove in class AbstractCollectionDecorator

      • removeAll

        public boolean removeAll​(java.util.Collection coll)
        Specified by:
        removeAll in interface java.util.Collection
        Overrides:
        removeAll in class AbstractCollectionDecorator

      • retainAll

        public boolean retainAll​(java.util.Collection coll)
        Specified by:
        retainAll in interface java.util.Collection
        Overrides:
        retainAll in class AbstractCollectionDecorator