import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / gandiva / src / main / java / org / apache / arrow / gandiva / evaluator / FunctionSignature.java

diff --git a/ceph/src/arrow/java/gandiva/src/main/java/org/apache/arrow/gandiva/evaluator/FunctionSignature.java b/ceph/src/arrow/java/gandiva/src/main/java/org/apache/arrow/gandiva/evaluator/FunctionSignature.java
new file mode 100644 (file)
index 0000000..d018818
--- /dev/null
+++ b/ceph/src/arrow/java/gandiva/src/main/java/org/apache/arrow/gandiva/evaluator/FunctionSignature.java
@@ -0,0 +1,93 @@
+/*
+ * 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.gandiva.evaluator;
+
+import java.util.List;
+
+import org.apache.arrow.vector.types.pojo.ArrowType;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Objects;
+
+/**
+ * POJO to define a function signature.
+ */
+public class FunctionSignature {
+  private final String name;
+  private final ArrowType returnType;
+  private final List<ArrowType> paramTypes;
+
+  public ArrowType getReturnType() {
+    return returnType;
+  }
+
+  public List<ArrowType> getParamTypes() {
+    return paramTypes;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  /**
+   * Ctor.
+   * @param name - name of the function.
+   * @param returnType - data type of return
+   * @param paramTypes - data type of input args.
+   */
+  public FunctionSignature(String name, ArrowType returnType, List<ArrowType> paramTypes) {
+    this.name = name;
+    this.returnType = returnType;
+    this.paramTypes = paramTypes;
+  }
+
+  /**
+   * Override equals.
+   * @param signature - signature to compare
+   * @return true if equal and false if not.
+   */
+  public boolean equals(Object signature) {
+    if (signature == null) {
+      return false;
+    }
+    if (getClass() != signature.getClass()) {
+      return false;
+    }
+    final FunctionSignature other = (FunctionSignature) signature;
+    return this.name.equalsIgnoreCase(other.name) &&
+        Objects.equal(this.returnType, other.returnType) &&
+        Objects.equal(this.paramTypes, other.paramTypes);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(this.name.toLowerCase(), this.returnType, this.paramTypes);
+  }
+
+  @Override
+  public String toString() {
+    return MoreObjects.toStringHelper(this)
+            .add("name ", name)
+            .add("return type ", returnType)
+            .add("param types ", paramTypes)
+            .toString();
+
+  }
+
+
+}