01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: * $Header:$
18: */
19: package org.apache.beehive.netui.util.iterator;
20:
21: import java.util.Iterator;
22: import java.util.NoSuchElementException;
23:
24: import org.apache.beehive.netui.util.Bundle;
25:
26: /**
27: */
28: public class AtomicObjectIterator implements Iterator {
29:
30: /**
31: * The object that should be wrapped in the iterator
32: */
33: private Object _object;
34:
35: /**
36: * A boolean to track if the single object in this iterator has been returned
37: */
38: private boolean _nextCalled = false;
39:
40: AtomicObjectIterator(Object object) {
41: _object = object;
42: }
43:
44: public boolean hasNext() {
45: if (_nextCalled || _object == null)
46: return false;
47: else
48: return true;
49: }
50:
51: public Object next() {
52: if (!_nextCalled && _object != null) {
53: _nextCalled = true;
54: return _object;
55: } else
56: throw new NoSuchElementException(
57: Bundle
58: .getErrorString("IteratorFactory_Iterator_noSuchElement"));
59: }
60:
61: public void remove() {
62: throw new UnsupportedOperationException(Bundle.getErrorString(
63: "IteratorFactory_Iterator_removeUnsupported",
64: new Object[] { this.getClass().getName() }));
65: }
66: }
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