de.odysseus.el.tree
Class TreeStore

java.lang.Object
  de.odysseus.el.tree.TreeStore

public class TreeStore
extends java.lang.Object

Tree store class. A tree store holds a TreeBuilder and a TreeCache, provided at construction time. The get(String) method is then used to serve expression trees.

Author:

Christoph Beck

Constructor Summary

TreeStore(TreeBuilder builder, TreeCache cache)
Constructor.

Method Summary

Tree	get(java.lang.String expression) Get a Tree.
TreeBuilder	getBuilder()

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeStore

public TreeStore(TreeBuilder builder,
                 TreeCache cache)

Constructor.

Parameters:

builder - the tree builder

cache - the tree cache (may be null)

Method Detail

getBuilder

public TreeBuilder getBuilder()

get

public Tree get(java.lang.String expression)
         throws ELException

Get a Tree. If a tree for the given expression is present in the cache, it is taken from there; otherwise, the expression string is parsed and the resulting tree is added to the cache.

Parameters:

expression - expression string

Returns:

expression tree

Throws:

ELException