blob: 4f3fc819b9f037540f419c648e3f99cf655d4ad6 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*******************************************************************************
* Copyright (c) 2009 Cloudsmith Inc. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Cloudsmith Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.p2.ql;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.equinox.internal.p2.core.helpers.CollectionUtils;
/**
* The immutable context used when evaluating an expression.
*/
public final class Everything<T> extends MatchIteratorFilter<T> implements IRepeatableIterator<T> {
private boolean atStart = true;
private final Class<T> elementClass;
public Everything(Class<T> elementClass, Collection<T> collection) {
super(RepeatableIterator.<T> create(collection == null ? CollectionUtils.<T> emptyList() : collection));
this.elementClass = elementClass;
}
public Everything(Class<T> elementClass, Iterator<? extends T> iterator, boolean needsRepeat) {
super(needsRepeat ? RepeatableIterator.create(iterator) : iterator);
this.elementClass = elementClass;
}
public IRepeatableIterator<T> getCopy() {
Iterator<? extends T> iterator = getInnerIterator();
if (iterator instanceof IRepeatableIterator<?>)
return new Everything<T>(elementClass, ((IRepeatableIterator<? extends T>) iterator).getCopy(), false);
if (atStart)
return this;
throw new UnsupportedOperationException();
}
public T next() {
atStart = false;
return super.next();
}
public Object getIteratorProvider() {
Iterator<? extends T> iterator = getInnerIterator();
if (iterator instanceof IRepeatableIterator<?>)
return ((IRepeatableIterator<?>) iterator).getIteratorProvider();
return this;
}
protected boolean isMatch(T val) {
return elementClass.isInstance(val);
}
}
|
