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+/**
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ *
+ */
+
+'use strict';
+
+var _prodInvariant = require('./reactProdInvariant');
+
+var invariant = require('fbjs/lib/invariant');
+
+/**
+ * Static poolers. Several custom versions for each potential number of
+ * arguments. A completely generic pooler is easy to implement, but would
+ * require accessing the `arguments` object. In each of these, `this` refers to
+ * the Class itself, not an instance. If any others are needed, simply add them
+ * here, or in their own files.
+ */
+var oneArgumentPooler = function (copyFieldsFrom) {
+ var Klass = this;
+ if (Klass.instancePool.length) {
+ var instance = Klass.instancePool.pop();
+ Klass.call(instance, copyFieldsFrom);
+ return instance;
+ } else {
+ return new Klass(copyFieldsFrom);
+ }
+};
+
+var twoArgumentPooler = function (a1, a2) {
+ var Klass = this;
+ if (Klass.instancePool.length) {
+ var instance = Klass.instancePool.pop();
+ Klass.call(instance, a1, a2);
+ return instance;
+ } else {
+ return new Klass(a1, a2);
+ }
+};
+
+var threeArgumentPooler = function (a1, a2, a3) {
+ var Klass = this;
+ if (Klass.instancePool.length) {
+ var instance = Klass.instancePool.pop();
+ Klass.call(instance, a1, a2, a3);
+ return instance;
+ } else {
+ return new Klass(a1, a2, a3);
+ }
+};
+
+var fourArgumentPooler = function (a1, a2, a3, a4) {
+ var Klass = this;
+ if (Klass.instancePool.length) {
+ var instance = Klass.instancePool.pop();
+ Klass.call(instance, a1, a2, a3, a4);
+ return instance;
+ } else {
+ return new Klass(a1, a2, a3, a4);
+ }
+};
+
+var standardReleaser = function (instance) {
+ var Klass = this;
+ !(instance instanceof Klass) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Trying to release an instance into a pool of a different type.') : _prodInvariant('25') : void 0;
+ instance.destructor();
+ if (Klass.instancePool.length < Klass.poolSize) {
+ Klass.instancePool.push(instance);
+ }
+};
+
+var DEFAULT_POOL_SIZE = 10;
+var DEFAULT_POOLER = oneArgumentPooler;
+
+/**
+ * Augments `CopyConstructor` to be a poolable class, augmenting only the class
+ * itself (statically) not adding any prototypical fields. Any CopyConstructor
+ * you give this may have a `poolSize` property, and will look for a
+ * prototypical `destructor` on instances.
+ *
+ * @param {Function} CopyConstructor Constructor that can be used to reset.
+ * @param {Function} pooler Customizable pooler.
+ */
+var addPoolingTo = function (CopyConstructor, pooler) {
+ // Casting as any so that flow ignores the actual implementation and trusts
+ // it to match the type we declared
+ var NewKlass = CopyConstructor;
+ NewKlass.instancePool = [];
+ NewKlass.getPooled = pooler || DEFAULT_POOLER;
+ if (!NewKlass.poolSize) {
+ NewKlass.poolSize = DEFAULT_POOL_SIZE;
+ }
+ NewKlass.release = standardReleaser;
+ return NewKlass;
+};
+
+var PooledClass = {
+ addPoolingTo: addPoolingTo,
+ oneArgumentPooler: oneArgumentPooler,
+ twoArgumentPooler: twoArgumentPooler,
+ threeArgumentPooler: threeArgumentPooler,
+ fourArgumentPooler: fourArgumentPooler
+};
+
+module.exports = PooledClass; \ No newline at end of file