Added new traits to the Buffer abstraction.

1 files changed, 177 insertions, 0 deletions

diff --git a/sources/scala/collection/mutable/SynchronizedBuffer.scala b/sources/scala/collection/mutable/SynchronizedBuffer.scala
new file mode 100644
index 0000000000..d41da4f858
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+++ b/sources/scala/collection/mutable/SynchronizedBuffer.scala
@@ -0,0 +1,177 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003, LAMP/EPFL                  **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+** $Id$
+\*                                                                      */
+
+package scala.collection.mutable;
+
+
+/** This trait should be used as a mixin. It synchronizes the <code>Buffer</code>
+ *  methods of the class into which it is mixed in.
+ *
+ *  @author  Matthias Zenger
+ *  @version 1.0, 08/07/2003
+ */
+trait SynchronizedBuffer[A] extends Buffer[A] {
+
+    abstract override def length: Int = synchronized {
+        super.length;
+    }
+
+    abstract override def elements: Iterator[A] = synchronized {
+        super.elements;
+    }
+
+    abstract override def apply(n: Int): A = synchronized {
+        super.apply(n);
+    }
+
+    /** Append a single element to this buffer and return
+     *  the identity of the buffer.
+     *
+     *  @param elem  the element to append.
+     */
+    abstract override def +(elem: A): Buffer[A] = synchronized {
+        super.+(elem);
+    }
+
+    /** Append a single element to this buffer.
+     *
+     *  @param elem  the element to append.
+     */
+    override def +=(elem: A): Unit = synchronized {
+        super.+=(elem);
+    }
+
+    /** Appends a number of elements provided by an iterable object
+     *  via its <code>elements</code> method. The identity of the
+     *  buffer is returned.
+     *
+     *  @param iter  the iterable object.
+     */
+    override def ++(iter: Iterable[A]): Buffer[A] = synchronized {
+        super.++(iter);
+    }
+
+    /** Appends a number of elements provided by an iterable object
+     *  via its <code>elements</code> method.
+     *
+     *  @param iter  the iterable object.
+     */
+    override def ++=(iter: Iterable[A]): Unit = synchronized {
+        super.++=(iter);
+    }
+
+    /** Appends a sequence of elements to this buffer.
+     *
+     *  @param elems  the elements to append.
+     */
+    override def append(elems: A*): Unit = synchronized {
+        super.++=(elems);
+    }
+
+    /** Appends a number of elements provided by an iterable object
+     *  via its <code>elements</code> method.
+     *
+     *  @param iter  the iterable object.
+     */
+    override def appendAll(iter: Iterable[A]): Unit = synchronized {
+        super.appendAll(iter);
+    }
+
+    /** Prepend a single element to this buffer and return
+     *  the identity of the buffer.
+     *
+     *  @param elem  the element to append.
+     */
+    abstract override def +:(elem: A): Buffer[A] = synchronized {
+        super.+:(elem);
+    }
+
+    /** Prepends a number of elements provided by an iterable object
+     *  via its <code>elements</code> method. The identity of the
+     *  buffer is returned.
+     *
+     *  @param iter  the iterable object.
+     */
+    override def ++:(iter: Iterable[A]): Buffer[A] = synchronized {
+        super.++:(iter);
+    }
+
+    /** Prepend an element to this list.
+     *
+     *  @param elem  the element to prepend.
+     */
+    override def prepend(elems: A*): Unit = synchronized {
+        super.prependAll(elems);
+    }
+
+    /** Prepends a number of elements provided by an iterable object
+     *  via its <code>elements</code> method. The identity of the
+     *  buffer is returned.
+     *
+     *  @param iter  the iterable object.
+     */
+    override def prependAll(elems: Iterable[A]): Unit = synchronized {
+        super.prependAll(elems);
+    }
+
+    /** Inserts new elements at the index <code>n</code>. Opposed to method
+     *  <code>update</code>, this method will not replace an element with a
+     *  one. Instead, it will insert the new elements at index <code>n</code>.
+     *
+     *  @param n      the index where a new element will be inserted.
+     *  @param elems  the new elements to insert.
+     */
+    override def insert(n: Int, elems: A*): Unit = synchronized {
+        super.insertAll(n, elems);
+    }
+
+    /** Inserts new elements at the index <code>n</code>. Opposed to method
+     *  <code>update</code>, this method will not replace an element with a
+     *  one. Instead, it will insert a new element at index <code>n</code>.
+     *
+     *  @param n     the index where a new element will be inserted.
+     *  @param iter  the iterable object providing all elements to insert.
+     */
+    abstract override def insertAll(n: Int, iter: Iterable[A]): Unit = synchronized {
+        super.insertAll(n, iter);
+    }
+
+    /** Replace element at index <code>n</code> with the new element
+     *  <code>newelem</code>.
+     *
+     *  @param n       the index of the element to replace.
+     *  @param newelem the new element.
+     */
+    abstract override def update(n: Int, newelem: A): Unit = synchronized {
+        super.update(n, newelem);
+    }
+
+    /** Removes the element on a given index position.
+     *
+     *  @param n  the index which refers to the element to delete.
+     */
+    abstract override def remove(n: Int): A = synchronized {
+        super.remove(n);
+    }
+
+    /** Clears the buffer contents.
+     */
+    abstract override def clear: Unit = synchronized {
+        super.clear;
+    }
+
+    /** The hashCode method always yields an error, since it is not
+     *  safe to use buffers as keys in hash tables.
+     *
+     *  @return never.
+     */
+    override def hashCode(): Int = synchronized {
+        super.hashCode();
+    }
+}