diff options
Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-M5-RC2/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CompoundEnumeration.java | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/sca-java-2.x/tags/2.0-M5-RC2/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CompoundEnumeration.java b/sca-java-2.x/tags/2.0-M5-RC2/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CompoundEnumeration.java deleted file mode 100644 index dc6a7e0f90..0000000000 --- a/sca-java-2.x/tags/2.0-M5-RC2/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/collection/CompoundEnumeration.java +++ /dev/null @@ -1,93 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you 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 org.apache.tuscany.sca.common.java.collection; - -import java.util.Enumeration; -import java.util.NoSuchElementException; - -public class CompoundEnumeration<T> implements Enumeration<T> { - private Enumeration<T>[] enumerations = null; - private int index = 0; - - public CompoundEnumeration(Enumeration<T>... enums) { - enumerations = enums; - } - - public boolean hasMoreElements() { - // if the current enum is null that means this enum is finished - if (currentEnumeration() == null) { - // No next enum - return false; - } - // If the current enum has more elements, lets go - return currentEnumeration().hasMoreElements(); - } - - private Enumeration<T> findNextEnumeration(boolean moveCursor) { - return findNextEnumeration(index, moveCursor); - } - - private Enumeration<T> findNextEnumeration(int cursor, boolean moveCursor) { - // next place in the array - int next = cursor + 1; - // If the cursor is still in the array - if (next < enumerations.length) { - - // If there is something in that place - // AND the enum is not empty - if (enumerations[next] != null && enumerations[next].hasMoreElements()) { - // OK - if (moveCursor) { - index = next; - } - return enumerations[next]; - } - // Try next element - return findNextEnumeration(next, moveCursor); - } - // No more elements available - return null; - } - - public T nextElement() { - // ask for the next element of the current enum. - if (currentEnumeration() != null) { - return currentEnumeration().nextElement(); - } - - // no more elements in this Enum - // We must throw a NoSuchElementException - throw new NoSuchElementException("No more elements"); - } - - private Enumeration<T> currentEnumeration() { - if (enumerations != null) { - if (index < enumerations.length) { - Enumeration<T> e = enumerations[index]; - if (e == null || !e.hasMoreElements()) { - // the current enum is null or empty - // we probably want to switch to the next one - e = findNextEnumeration(true); - } - return e; - } - } - return null; - } -} |