01 /*
02 * SPDX-License-Identifier: Apache-2.0
03 *
04 * Copyright 2008-2017 the original author or authors.
05 *
06 * Licensed under the Apache License, Version 2.0 (the "License");
07 * you may not use this file except in compliance with the License.
08 * You may obtain a copy of the License at
09 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package griffon.builder.pivot
19
20 /**
21 * @author Andres Almiray
22 */
23 final class FixedIterator implements Iterator {
24 private final iterable
25 private final boolean mutable
26 private int index = 0;
27
28 FixedIterator(iterable, boolean mutable = false) {
29 this.iterable = iterable
30 this.mutable = mutable
31 }
32
33 boolean hasNext() {
34 return index > -1 && index < size()
35 }
36
37 Object next() {
38 return iterable.get(index++)
39 }
40
41 void remove() {
42 if (!mutable) {
43 throw new UnsupportedOperationException("Immutable iterator!")
44 }
45 if (hasNext()) iterable.remove(index--)
46 }
47
48 private int size() {
49 MetaClass mc = iterable.metaClass
50 if (mc.respondsTo(iterable, 'getLength')) return iterable.getLength()
51 if (mc.respondsTo(iterable, 'getSize')) return iterable.getSize()
52 if (mc.respondsTo(iterable, 'getCount')) return iterable.getCount()
53 -1
54 }
55 }
|