added iOS source code

[wl-app.git] / iOS / Pods / Realm / Realm / RLMPredicateUtil.mm

diff --git a/iOS/Pods/Realm/Realm/RLMPredicateUtil.mm b/iOS/Pods/Realm/Realm/RLMPredicateUtil.mm
new file mode 100644 (file)
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+++ b/iOS/Pods/Realm/Realm/RLMPredicateUtil.mm
@@ -0,0 +1,127 @@
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2015 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#import "RLMPredicateUtil.hpp"
+
+#include <realm/util/assert.hpp>
+
+// NSConditionalExpressionType is new in OS X 10.11 and iOS 9.0
+#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
+#define CONDITIONAL_EXPRESSION_DECLARED (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101100)
+#elif defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
+#define CONDITIONAL_EXPRESSION_DECLARED (__IPHONE_OS_VERSION_MIN_REQUIRED >= 90000)
+#else
+#define CONDITIONAL_EXPRESSION_DECLARED 0
+#endif
+
+#if !CONDITIONAL_EXPRESSION_DECLARED
+
+#define NSConditionalExpressionType 20
+
+@interface NSExpression (NewIn1011And90)
++ (NSExpression *)expressionForConditional:(NSPredicate *)predicate trueExpression:(NSExpression *)trueExpression falseExpression:(NSExpression *)falseExpression;
+- (NSExpression *)trueExpression;
+- (NSExpression *)falseExpression;
+@end
+
+#endif
+
+namespace {
+
+struct PredicateExpressionTransformer {
+    PredicateExpressionTransformer(ExpressionVisitor visitor) : m_visitor(visitor) { }
+
+    NSExpression *visit(NSExpression *expression) const;
+    NSPredicate *visit(NSPredicate *predicate) const;
+
+    ExpressionVisitor m_visitor;
+};
+
+NSExpression *PredicateExpressionTransformer::visit(NSExpression *expression) const {
+    expression = m_visitor(expression);
+
+    switch (expression.expressionType) {
+        case NSFunctionExpressionType: {
+            NSMutableArray *arguments = [NSMutableArray array];
+            for (NSExpression *argument in expression.arguments) {
+                [arguments addObject:visit(argument)];
+            }
+            if (expression.operand) {
+                return [NSExpression expressionForFunction:visit(expression.operand) selectorName:expression.function arguments:arguments];
+            } else {
+                return [NSExpression expressionForFunction:expression.function arguments:arguments];
+            }
+        }
+
+        case NSUnionSetExpressionType:
+            return [NSExpression expressionForUnionSet:visit(expression.leftExpression) with:visit(expression.rightExpression)];
+        case NSIntersectSetExpressionType:
+            return [NSExpression expressionForIntersectSet:visit(expression.leftExpression) with:visit(expression.rightExpression)];
+        case NSMinusSetExpressionType:
+            return [NSExpression expressionForMinusSet:visit(expression.leftExpression) with:visit(expression.rightExpression)];
+
+        case NSSubqueryExpressionType: {
+            NSExpression *collection = expression.collection;
+            // NSExpression.collection is declared as id, but appears to always hold an NSExpression for subqueries.
+            REALM_ASSERT([collection isKindOfClass:[NSExpression class]]);
+            return [NSExpression expressionForSubquery:visit(collection) usingIteratorVariable:expression.variable predicate:visit(expression.predicate)];
+        }
+
+        case NSAggregateExpressionType: {
+            NSMutableArray *subexpressions = [NSMutableArray array];
+            for (NSExpression *subexpression in expression.collection) {
+                [subexpressions addObject:visit(subexpression)];
+            }
+            return [NSExpression expressionForAggregate:subexpressions];
+        }
+
+        case NSConditionalExpressionType:
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wpartial-availability"
+            return [NSExpression expressionForConditional:visit(expression.predicate) trueExpression:visit(expression.trueExpression) falseExpression:visit(expression.falseExpression)];
+#pragma clang diagnostic pop
+
+        default:
+            // The remaining expression types do not contain nested expressions or predicates.
+            return expression;
+    }
+}
+
+NSPredicate *PredicateExpressionTransformer::visit(NSPredicate *predicate) const {
+    if ([predicate isKindOfClass:[NSCompoundPredicate class]]) {
+        NSCompoundPredicate *compoundPredicate = (NSCompoundPredicate *)predicate;
+        NSMutableArray *subpredicates = [NSMutableArray array];
+        for (NSPredicate *subpredicate in compoundPredicate.subpredicates) {
+            [subpredicates addObject:visit(subpredicate)];
+        }
+        return [[NSCompoundPredicate alloc] initWithType:compoundPredicate.compoundPredicateType subpredicates:subpredicates];
+    }
+    if ([predicate isKindOfClass:[NSComparisonPredicate class]]) {
+        NSComparisonPredicate *comparisonPredicate = (NSComparisonPredicate *)predicate;
+        NSExpression *leftExpression = visit(comparisonPredicate.leftExpression);
+        NSExpression *rightExpression = visit(comparisonPredicate.rightExpression);
+        return [NSComparisonPredicate predicateWithLeftExpression:leftExpression rightExpression:rightExpression modifier:comparisonPredicate.comparisonPredicateModifier type:comparisonPredicate.predicateOperatorType options:comparisonPredicate.options];
+    }
+    return predicate;
+}
+
+} // anonymous namespace
+
+NSPredicate *transformPredicate(NSPredicate *predicate, ExpressionVisitor visitor) {
+    PredicateExpressionTransformer transformer(visitor);
+    return transformer.visit(predicate);
+}