1 files changed, 73 insertions, 0 deletions
diff --git a/third_party/libwebrtc/sdk/android/api/org/webrtc/Predicate.java b/third_party/libwebrtc/sdk/android/api/org/webrtc/Predicate.java
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+++ b/third_party/libwebrtc/sdk/android/api/org/webrtc/Predicate.java
@@ -0,0 +1,73 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.webrtc;
+
+/**
+ * Represents a predicate (boolean-valued function) of one argument.
+ */
+public interface Predicate<T> {
+  /**
+   * Evaluates this predicate on the given argument.
+   *
+   * @param arg the input argument
+   * @return true if the input argument matches the predicate, otherwise false
+   */
+  boolean test(T arg);
+
+  /**
+   * Returns a composed predicate that represents a short-circuiting logical OR of this predicate
+   * and another. When evaluating the composed predicate, if this predicate is true, then the other
+   * predicate is not evaluated.
+   *
+   * @param other a predicate that will be logically-ORed with this predicate
+   * @return a composed predicate that represents the short-circuiting logical OR of this predicate
+   *     and the other predicate
+   */
+  default Predicate<T> or(Predicate<? super T> other) {
+    return new Predicate<T>() {
+      @Override
+      public boolean test(T arg) {
+        return Predicate.this.test(arg) || other.test(arg);
+      }
+    };
+  }
+
+  /**
+   * Returns a composed predicate that represents a short-circuiting logical AND of this predicate
+   * and another.
+   *
+   * @param other a predicate that will be logically-ANDed with this predicate
+   * @return a composed predicate that represents the short-circuiting logical AND of this predicate
+   *     and the other predicate
+   */
+  default Predicate<T> and(Predicate<? super T> other) {
+    return new Predicate<T>() {
+      @Override
+      public boolean test(T arg) {
+        return Predicate.this.test(arg) && other.test(arg);
+      }
+    };
+  }
+
+  /**
+   * Returns a predicate that represents the logical negation of this predicate.
+   *
+   * @return a predicate that represents the logical negation of this predicate
+   */
+  default Predicate<T> negate() {
+    return new Predicate<T>() {
+      @Override
+      public boolean test(T arg) {
+        return !Predicate.this.test(arg);
+      }
+    };
+  }
+}
+\ No newline at end of file