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move native accesses of map into two accesses instead of per-element

Differential Revision: D6650192

fbshipit-source-id: 0eb0719fd3b7813add33a3d4fe3fb70e6f375fd7
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Kathy Gray authored and facebook-github-bot committed Jan 17, 2018
1 parent 5649aed commit 7891805d22e3fdc821961ff0ccc5c450c3d625c8
@@ -14,6 +14,9 @@
import java.util.HashMap;
import com.facebook.infer.annotation.Assertions;
import javax.annotation.Nullable;
/**
* Implementation of a read-only map in native memory. This will generally be constructed and filled
* in native code so you shouldn't construct one yourself.
@@ -28,24 +31,177 @@ protected ReadableNativeMap(HybridData hybridData) {
super(hybridData);
}
private @Nullable String[] mKeys;
private @Nullable HashMap<String,Object> mLocalMap;
private @Nullable HashMap<String,ReadableType> mLocalTypeMap;
private static boolean mUseNativeAccessor;
private static int mJniCallCounter;
public static void setUseNativeAccessor(boolean useNativeAccessor) {
mUseNativeAccessor = useNativeAccessor;
}
public static int getJNIPassCounter() {
return mJniCallCounter;
}
private HashMap<String,Object> getLocalMap() {
// Fast return for the common case
if (mLocalMap != null) {
return mLocalMap;
}
// Check and when necessary get keys atomicaly
synchronized (this) {
if (mKeys == null) {
mKeys = Assertions.assertNotNull(importKeys());
mJniCallCounter++;
}
if (mLocalMap == null) {
Object[] values = Assertions.assertNotNull(importValues());
mJniCallCounter++;
mLocalMap = new HashMap<>();
for(int i = 0; i< mKeys.length; i++) {
mLocalMap.put(mKeys[i], values[i]);
}
}
}
return mLocalMap;
}
private native String[] importKeys();
private native Object[] importValues();
private HashMap<String,ReadableType> getLocalTypeMap() {
// Fast and non-blocking return for common case
if (mLocalTypeMap != null) {
return mLocalTypeMap;
}
// Check and when necessary get keys
synchronized (this) {
if (mKeys == null) {
mKeys = Assertions.assertNotNull(importKeys());
mJniCallCounter++;
}
// check that no other thread has already updated
if (mLocalTypeMap == null) {
Object[] types = Assertions.assertNotNull(importTypes());
mJniCallCounter++;
mLocalTypeMap = new HashMap<>();
for(int i = 0; i< mKeys.length; i++) {
mLocalTypeMap.put(mKeys[i], (ReadableType) types[i]);
}
}
}
return mLocalTypeMap;
}
private native Object[] importTypes();
@Override
public native boolean hasKey(String name);
public boolean hasKey(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return hasKeyNative(name);
}
return getLocalMap().containsKey(name);
}
private native boolean hasKeyNative(String name);
@Override
public native boolean isNull(String name);
public boolean isNull(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return isNullNative(name);
}
if (getLocalMap().containsKey(name)) {
return getLocalMap().get(name) == null;
}
throw new NoSuchKeyException(name);
}
private native boolean isNullNative(String name);
private Object getValue(String name) {
if (hasKey(name) && !(isNull(name))) {
return Assertions.assertNotNull(getLocalMap().get(name));
}
throw new NoSuchKeyException(name);
}
private @Nullable Object getNullableValue(String name) {
if (hasKey(name)) {
return getLocalMap().get(name);
}
throw new NoSuchKeyException(name);
}
@Override
public native boolean getBoolean(String name);
public boolean getBoolean(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getBooleanNative(name);
}
return ((Boolean) getValue(name)).booleanValue();
}
private native boolean getBooleanNative(String name);
@Override
public native double getDouble(String name);
public double getDouble(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getDoubleNative(name);
}
return ((Double) getValue(name)).doubleValue();
}
private native double getDoubleNative(String name);
@Override
public native int getInt(String name);
public int getInt(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getIntNative(name);
}
// All numbers coming out of native are doubles, so cast here then truncate
return ((Double) getValue(name)).intValue();
}
private native int getIntNative(String name);
@Override
public native String getString(String name);
public @Nullable String getString(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getStringNative(name);
}
return (String) getNullableValue(name);
}
private native String getStringNative(String name);
@Override
public native ReadableNativeArray getArray(String name);
public @Nullable ReadableArray getArray(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getArrayNative(name);
}
return (ReadableArray) getNullableValue(name);
}
private native ReadableNativeArray getArrayNative(String name);
@Override
public native ReadableNativeMap getMap(String name);
public @Nullable ReadableNativeMap getMap(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getMapNative(name);
}
return (ReadableNativeMap) getNullableValue(name);
}
private native ReadableNativeMap getMapNative(String name);
@Override
public native ReadableType getType(String name);
public ReadableType getType(String name) {
if (mUseNativeAccessor) {
mJniCallCounter++;
return getTypeNative(name);
}
if (getLocalTypeMap().containsKey(name)) {
return Assertions.assertNotNull(getLocalTypeMap().get(name));
}
throw new NoSuchKeyException(name);
}
private native ReadableType getTypeNative(String name);
@Override
public Dynamic getDynamic(String name) {
@@ -59,35 +215,42 @@ public ReadableMapKeySetIterator keySetIterator() {
@Override
public HashMap<String, Object> toHashMap() {
ReadableMapKeySetIterator iterator = keySetIterator();
HashMap<String, Object> hashMap = new HashMap<>();
while (iterator.hasNextKey()) {
String key = iterator.nextKey();
switch (getType(key)) {
case Null:
hashMap.put(key, null);
break;
case Boolean:
hashMap.put(key, getBoolean(key));
break;
case Number:
hashMap.put(key, getDouble(key));
break;
case String:
hashMap.put(key, getString(key));
break;
case Map:
hashMap.put(key, getMap(key).toHashMap());
break;
case Array:
hashMap.put(key, getArray(key).toArrayList());
break;
default:
throw new IllegalArgumentException("Could not convert object with key: " + key + ".");
}
if (mUseNativeAccessor) {
ReadableMapKeySetIterator iterator = keySetIterator();
HashMap<String, Object> hashMap = new HashMap<>();
while (iterator.hasNextKey()) {
// increment for hasNextKey call
mJniCallCounter++;
String key = iterator.nextKey();
// increment for nextKey call
mJniCallCounter++;
switch (getType(key)) {
case Null:
hashMap.put(key, null);
break;
case Boolean:
hashMap.put(key, getBoolean(key));
break;
case Number:
hashMap.put(key, getDouble(key));
break;
case String:
hashMap.put(key, getString(key));
break;
case Map:
hashMap.put(key, Assertions.assertNotNull(getMap(key)).toHashMap());
break;
case Array:
hashMap.put(key, Assertions.assertNotNull(getArray(key)).toArrayList());
break;
default:
throw new IllegalArgumentException("Could not convert object with key: " + key + ".");
}
}
return hashMap;
}
return hashMap;
return getLocalMap();
}
/**
@@ -17,6 +17,76 @@ void ReadableNativeMap::mapException(const std::exception& ex) {
}
}
local_ref<JArrayClass<jstring>> ReadableNativeMap::importKeys() {
auto pairs = map_.items();
keys_ = folly::dynamic::array();
for (auto &pair : pairs) {
keys_.value().push_back(pair.first.asString());
}
jint size = keys_.value().size();
auto jarray = JArrayClass<jstring>::newArray(size);
for (jint i = 0; i < size; i++) {
jarray->setElement(i, make_jstring(keys_.value()[i].getString().c_str()).release());
}
return jarray;
}
local_ref<JArrayClass<jobject>> ReadableNativeMap::importValues() {
jint size = keys_.value().size();
auto jarray = JArrayClass<jobject>::newArray(size);
for (jint i = 0; i < size; i++) {
std::string key = keys_.value()[i].getString().c_str();
const auto element = map_.at(key);
switch(element.type()) {
case folly::dynamic::Type::NULLT: {
jarray->setElement(i, nullptr);
break;
}
case folly::dynamic::Type::BOOL: {
jarray->
setElement(i,
JBoolean::valueOf(ReadableNativeMap::getBooleanKey(key)).release());
break;
}
case folly::dynamic::Type::INT64:
case folly::dynamic::Type::DOUBLE: {
jarray->setElement(i,
JDouble::valueOf(ReadableNativeMap::getDoubleKey(key)).release());
break;
}
case folly::dynamic::Type::STRING: {
jarray->
setElement(i,
ReadableNativeMap::getStringKey(key).release());
break;
}
case folly::dynamic::Type::OBJECT: {
jarray->setElement(i,ReadableNativeMap::getMapKey(key).release());
break;
}
case folly::dynamic::Type::ARRAY: {
jarray->setElement(i,ReadableNativeMap::getArrayKey(key).release());
break;
}
default: {
jarray->setElement(i,nullptr);
break;
}
}
}
return jarray;
}
local_ref<JArrayClass<jobject>> ReadableNativeMap::importTypes() {
jint size = keys_.value().size();
auto jarray = JArrayClass<jobject>::newArray(size);
for (jint i = 0; i < size; i++) {
std::string key = keys_.value()[i].getString().c_str();
jarray->setElement(i, ReadableNativeMap::getValueType(key).release());
}
return jarray;
}
bool ReadableNativeMap::hasKey(const std::string& key) {
return map_.find(key) != map_.items().end();
}
@@ -99,15 +169,18 @@ local_ref<ReadableNativeMap::jhybridobject> ReadableNativeMap::createWithContent
void ReadableNativeMap::registerNatives() {
registerHybrid({
makeNativeMethod("hasKey", ReadableNativeMap::hasKey),
makeNativeMethod("isNull", ReadableNativeMap::isNull),
makeNativeMethod("getBoolean", ReadableNativeMap::getBooleanKey),
makeNativeMethod("getDouble", ReadableNativeMap::getDoubleKey),
makeNativeMethod("getInt", ReadableNativeMap::getIntKey),
makeNativeMethod("getString", ReadableNativeMap::getStringKey),
makeNativeMethod("getArray", ReadableNativeMap::getArrayKey),
makeNativeMethod("getMap", ReadableNativeMap::getMapKey),
makeNativeMethod("getType", ReadableNativeMap::getValueType),
makeNativeMethod("importKeys", ReadableNativeMap::importKeys),
makeNativeMethod("importValues", ReadableNativeMap::importValues),
makeNativeMethod("importTypes", ReadableNativeMap::importTypes),
makeNativeMethod("hasKeyNative", ReadableNativeMap::hasKey),
makeNativeMethod("isNullNative", ReadableNativeMap::isNull),
makeNativeMethod("getBooleanNative", ReadableNativeMap::getBooleanKey),
makeNativeMethod("getDoubleNative", ReadableNativeMap::getDoubleKey),
makeNativeMethod("getIntNative", ReadableNativeMap::getIntKey),
makeNativeMethod("getStringNative", ReadableNativeMap::getStringKey),
makeNativeMethod("getArrayNative", ReadableNativeMap::getArrayKey),
makeNativeMethod("getMapNative", ReadableNativeMap::getMapKey),
makeNativeMethod("getTypeNative", ReadableNativeMap::getValueType),
});
}
@@ -5,6 +5,7 @@
#include <fb/fbjni.h>
#include <folly/dynamic.h>
#include <folly/json.h>
#include <folly/Optional.h>
#include "NativeCommon.h"
#include "NativeMap.h"
@@ -18,6 +19,9 @@ struct WritableNativeMap;
struct ReadableNativeMap : jni::HybridClass<ReadableNativeMap, NativeMap> {
static auto constexpr kJavaDescriptor = "Lcom/facebook/react/bridge/ReadableNativeMap;";
jni::local_ref<jni::JArrayClass<jstring>> importKeys();
jni::local_ref<jni::JArrayClass<jobject>> importValues();
jni::local_ref<jni::JArrayClass<jobject>> importTypes();
bool hasKey(const std::string& key);
const folly::dynamic& getMapValue(const std::string& key);
bool isNull(const std::string& key);
@@ -28,6 +32,7 @@ struct ReadableNativeMap : jni::HybridClass<ReadableNativeMap, NativeMap> {
jni::local_ref<ReadableNativeArray::jhybridobject> getArrayKey(const std::string& key);
jni::local_ref<jhybridobject> getMapKey(const std::string& key);
jni::local_ref<ReadableType> getValueType(const std::string& key);
folly::Optional<folly::dynamic> keys_;
static jni::local_ref<jhybridobject> createWithContents(folly::dynamic&& map);
static void mapException(const std::exception& ex);

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