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Copy pathIxFromArray.java
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71 lines (58 loc) · 1.69 KB
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/*
* Copyright 2011-2016 David Karnok
*
* 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 ix;
import java.util.*;
final class IxFromArray<T> extends Ix<T> {
final int start;
final int end;
final T[] array;
IxFromArray(int start, int end, T[] array) {
this.start = start;
this.end = end;
this.array = array;
}
@Override
public Iterator<T> iterator() {
return new FromArray<T>(start, end, array);
}
static final class FromArray<T> implements Iterator<T> {
final T[] array;
final int end;
int index;
FromArray(int start, int end, T[] array) {
this.index = start;
this.end = end;
this.array = array;
}
@Override
public boolean hasNext() {
return index != end;
}
@Override
public T next() {
int i = index;
if (i != end) {
index = i + 1;
return array[i];
}
throw new NoSuchElementException();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}
}