import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / vector / src / main / java / org / apache / arrow / vector / compare / VectorEqualsVisitor.java

diff --git a/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/compare/VectorEqualsVisitor.java b/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/compare/VectorEqualsVisitor.java
new file mode 100644 (file)
index 0000000..390d138
--- /dev/null
+++ b/ceph/src/arrow/java/vector/src/main/java/org/apache/arrow/vector/compare/VectorEqualsVisitor.java
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.arrow.vector.compare;
+
+import static org.apache.arrow.vector.compare.RangeEqualsVisitor.DEFAULT_TYPE_COMPARATOR;
+
+import java.util.function.BiFunction;
+
+import org.apache.arrow.vector.ValueVector;
+
+/**
+ * Visitor to compare vectors equal.
+ */
+public class VectorEqualsVisitor {
+
+  /**
+   * Checks if two vectors are equals with default type comparator.
+   * @param left the left vector to compare.
+   * @param right the right vector to compare.
+   * @return true if the vectors are equal, and false otherwise.
+   */
+  public static boolean vectorEquals(ValueVector left, ValueVector right) {
+    return vectorEquals(left, right, DEFAULT_TYPE_COMPARATOR);
+  }
+
+  /**
+   * Checks if two vectors are equals.
+   * @param left the left vector to compare.
+   * @param right the right vector to compare.
+   * @param typeComparator type comparator to compare vector type.
+   * @return true if the vectors are equal, and false otherwise.
+   */
+  public static boolean vectorEquals(
+      ValueVector left,
+      ValueVector right,
+      BiFunction<ValueVector, ValueVector, Boolean> typeComparator) {
+
+    if (left.getValueCount() != right.getValueCount()) {
+      return false;
+    }
+
+    RangeEqualsVisitor visitor = new RangeEqualsVisitor(left, right, typeComparator);
+    return visitor.rangeEquals(new Range(0, 0, left.getValueCount()));
+  }
+}