mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-04-15 12:12:31 +08:00
1490ab12ef
Summary:
Includes React Native and its dependencies Fresco, Metro, and Yoga. Excludes samples/examples/docs.
find: ^(?:( *)|( *(?:[\*~#]|::))( )? *)?Copyright (?:\(c\) )?(\d{4})\b.+Facebook[\s\S]+?BSD[\s\S]+?(?:this source tree|the same directory)\.$
replace: $1$2$3Copyright (c) $4-present, Facebook, Inc.\n$2\n$1$2$3This source code is licensed under the MIT license found in the\n$1$2$3LICENSE file in the root directory of this source tree.
Reviewed By: TheSavior, yungsters
Differential Revision: D7007050
fbshipit-source-id: 37dd6bf0ffec0923bfc99c260bb330683f35553e
52 lines
1.3 KiB
Java
52 lines
1.3 KiB
Java
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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package com.facebook.jni;
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import javax.annotation.Nullable;
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import java.util.Iterator;
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import java.util.Map;
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import com.facebook.proguard.annotations.DoNotStrip;
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/**
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* To iterate over a Map from C++ requires four calls per entry: hasNext(),
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* next(), getKey(), getValue(). This helper reduces it to one call and two
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* field gets per entry. It does not use a generic argument, since in C++, the
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* types will be erased, anyway. This is *not* a {@link java.util.Iterator}.
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*/
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@DoNotStrip
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public class MapIteratorHelper {
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@DoNotStrip private final Iterator<Map.Entry> mIterator;
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@DoNotStrip private @Nullable Object mKey;
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@DoNotStrip private @Nullable Object mValue;
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@DoNotStrip
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public MapIteratorHelper(Map map) {
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mIterator = map.entrySet().iterator();
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}
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/**
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* Moves the helper to the next entry in the map, if any. Returns true iff
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* there is an entry to read.
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*/
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@DoNotStrip
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boolean hasNext() {
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if (mIterator.hasNext()) {
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Map.Entry entry = mIterator.next();
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mKey = entry.getKey();
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mValue = entry.getValue();
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return true;
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} else {
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mKey = null;
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mValue = null;
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return false;
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}
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}
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}
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