79 lines
3.0 KiB
C#
79 lines
3.0 KiB
C#
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using System.Linq;
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using System.Collections;
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using System.Collections.Generic;
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namespace LeanCloud.Storage.Internal.Object {
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internal class LCBatch {
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internal HashSet<LCObject> objects;
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internal LCBatch(IEnumerable<LCObject> objs) {
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if (objs == null) {
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objects = new HashSet<LCObject>();
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} else {
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objects = new HashSet<LCObject>(objs);
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}
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}
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internal static bool HasCircleReference(object obj, HashSet<LCObject> parents) {
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if (obj is LCObject lcObj && parents.Contains(lcObj)) {
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return true;
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}
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IEnumerable deps = null;
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if (obj is IList list) {
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deps = list;
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} else if (obj is IDictionary dict) {
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deps = dict.Values;
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} else if (obj is LCObject lcObject) {
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deps = lcObject.estimatedData.Values;
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}
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HashSet<LCObject> depParents = new HashSet<LCObject>(parents);
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if (obj is LCObject) {
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depParents.Add(obj as LCObject);
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}
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if (deps != null) {
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foreach (object dep in deps) {
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HashSet<LCObject> ps = new HashSet<LCObject>(depParents);
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if (HasCircleReference(dep, ps)) {
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return true;
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}
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}
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}
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return false;
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}
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internal static Stack<LCBatch> BatchObjects(IEnumerable<LCObject> objects, bool containSelf) {
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Stack<LCBatch> batches = new Stack<LCBatch>();
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if (containSelf) {
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batches.Push(new LCBatch(objects));
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}
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HashSet<object> deps = new HashSet<object>();
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foreach (LCObject obj in objects) {
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deps.UnionWith(obj.operationDict.Values.Select(op => op.GetNewObjectList()));
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}
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do {
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HashSet<object> childSet = new HashSet<object>();
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foreach (object dep in deps) {
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IEnumerable children = null;
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if (dep is IList list) {
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children = list;
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} else if (dep is IDictionary dict) {
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children = dict;
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} else if (dep is LCObject lcDep && lcDep.ObjectId == null) {
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children = lcDep.operationDict.Values.Select(op => op.GetNewObjectList());
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}
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if (children != null) {
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childSet.UnionWith(children.Cast<object>());
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}
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}
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IEnumerable<LCObject> depObjs = deps.Where(item => item is LCObject lcItem && lcItem.ObjectId == null)
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.Cast<LCObject>();
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if (depObjs != null && depObjs.Count() > 0) {
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batches.Push(new LCBatch(depObjs));
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}
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deps = childSet;
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} while (deps != null && deps.Count > 0);
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return batches;
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}
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}
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}
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