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Diffstat (limited to 'infrastructure/net.appjet.oui/dynamicvar.scala')
-rw-r--r-- | infrastructure/net.appjet.oui/dynamicvar.scala | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/infrastructure/net.appjet.oui/dynamicvar.scala b/infrastructure/net.appjet.oui/dynamicvar.scala deleted file mode 100644 index b1f8c2e..0000000 --- a/infrastructure/net.appjet.oui/dynamicvar.scala +++ /dev/null @@ -1,49 +0,0 @@ -/** - * Copyright 2009 Google Inc. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS-IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package net.appjet.oui; - -class NoninheritedDynamicVariable[T](init: T) { - private val tl = new ThreadLocal[T] { - override def initialValue = init.asInstanceOf[T with AnyRef] - } - - /** Retrieve the current value */ - def value: T = tl.get.asInstanceOf[T] - - - /** Set the value of the variable while executing the specified - * thunk. - * - * @param newval The value to which to set the fluid - * @param thunk The code to evaluate under the new setting - */ - def withValue[S](newval: T)(thunk: =>S): S = { - val oldval = value - tl.set(newval) - - try { thunk } finally { - tl.set(oldval) - } - } - - /** Change the currently bound value, discarding the old value. - * Usually <code>withValue()</code> gives better semantics. - */ - def value_=(newval: T) = { tl.set(newval) } - - override def toString: String = "NoninheritedDynamicVariable(" + value +")" -} |