1 files changed, 40 insertions, 0 deletions
diff --git a/java/com/google/gerrit/index/query/LimitPredicate.java b/java/com/google/gerrit/index/query/LimitPredicate.java
new file mode 100644
index 0000000000..23e0f6dbd0
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+++ b/java/com/google/gerrit/index/query/LimitPredicate.java
@@ -0,0 +1,40 @@
+// Copyright (C) 2014 The Android Open Source Project
+//
+// 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.
+
+package com.google.gerrit.index.query;
+
+public class LimitPredicate<T> extends IntPredicate<T> implements Matchable<T> {
+  @SuppressWarnings("unchecked")
+  public static Integer getLimit(String fieldName, Predicate<?> p) {
+    IntPredicate<?> ip = QueryBuilder.find(p, IntPredicate.class, fieldName);
+    return ip != null ? ip.intValue() : null;
+  }
+
+  public LimitPredicate(String fieldName, int limit) throws QueryParseException {
+    super(fieldName, limit);
+    if (limit <= 0) {
+      throw new QueryParseException("limit must be positive: " + limit);
+    }
+  }
+
+  @Override
+  public boolean match(T object) {
+    return true;
+  }
+
+  @Override
+  public int getCost() {
+    return 0;
+  }
+}