Package org.eclipse.emf.ecp.common.spi.cachetree

Class CachedTreeNode<T>

    • Constructor Summary

      Constructors 
      Constructor Description
      CachedTreeNode​(T initialValue)
      Constructor.

    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      protected java.util.Map<java.lang.Object,​T> getCache()
      Returns the internal representation of the child value cache.
      T getChildValue()
      Returns the most severe cached value of all children.
      abstract T getDisplayValue()
      Returns the value that this node should represent.
      T getOwnValue()
      Returns the value of this node.
      java.lang.Object getParent()  
      void putIntoCache​(java.lang.Object key, T value)
      Puts a value into the cache and updates its value.
      void removeFromCache​(java.lang.Object key)
      Removes a (child) object from the cache and updates its value.
      protected void setChildValue​(T childValue)
      Sets the the most severe cached value of all children.
      void setOwnValue​(T newValue)
      Sets the value of this node.
      void setParent​(java.lang.Object parent)  
      protected abstract void update()
      Recomputes the cached value of this node.
      java.util.Collection<T> values()
      Returns the cached values that are stored in the children nodes.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • CachedTreeNode

        public CachedTreeNode​(T initialValue)
        Constructor.
        Parameters:
        initialValue - the initial value

    • Method Detail

      • update

        protected abstract void update()
        Recomputes the cached value of this node.

      • putIntoCache

        public void putIntoCache​(java.lang.Object key,
                         T value)
        Puts a value into the cache and updates its value.
        Parameters:
        key - the (child) object that contains the given value
        value - an additional value that will be considered for the computation of the actual value that results to a update() call

      • removeFromCache

        public void removeFromCache​(java.lang.Object key)
        Removes a (child) object from the cache and updates its value.
        Parameters:
        key - the object to be removed

      • getOwnValue

        public T getOwnValue()
        Returns the value of this node.
        Returns:
        the value stored within this node

      • setOwnValue

        public void setOwnValue​(T newValue)
        Sets the value of this node.
        Parameters:
        newValue - the new value to be associated with this node

      • values

        public java.util.Collection<T> values()
        Returns the cached values that are stored in the children nodes.
        Returns:
        a set of values stored in the children nodes of this node

      • getChildValue

        public T getChildValue()
        Returns the most severe cached value of all children.
        Returns:
        the childValue

      • setChildValue

        protected void setChildValue​(T childValue)
        Sets the the most severe cached value of all children.
        Parameters:
        childValue - the childValue to set

      • getDisplayValue

        public abstract T getDisplayValue()
        Returns the value that this node should represent. This value is also passed to parents in case of changes to the tree.
        Returns:
        the display value

      • getParent

        public java.lang.Object getParent()
        Returns:
        the parent object, this is not the parent tree node.

      • setParent

        public void setParent​(java.lang.Object parent)
        Parameters:
        parent - the parent to set, this is not the parent tree node.

      • getCache

        protected final java.util.Map<java.lang.Object,​T> getCache()
        Returns the internal representation of the child value cache.
        Returns:
        the cache
        Since:
        1.9