| /** |
| * 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.tajo.algebra; |
| |
| import com.google.common.base.Objects; |
| import com.google.gson.annotations.Expose; |
| import com.google.gson.annotations.SerializedName; |
| import org.apache.tajo.util.TUtil; |
| |
| public class FunctionExpr extends Expr { |
| @Expose @SerializedName("Signature") |
| private String signature; |
| @Expose @SerializedName("FuncParams") |
| private Expr[] params; |
| |
| public FunctionExpr(String signature) { |
| this(OpType.Function, signature); |
| } |
| |
| public FunctionExpr(String signature, Expr [] params) { |
| this(OpType.Function, signature); |
| setParams(params); |
| } |
| |
| protected FunctionExpr(OpType type, String signature) { |
| super(type); |
| if (type != OpType.Function && type != OpType.CountRowsFunction) { |
| throw new IllegalArgumentException("FunctionExpr cannot accept " + type + "type"); |
| } |
| this.signature = signature.toLowerCase(); |
| } |
| |
| protected FunctionExpr(OpType type, String signature, Expr [] params) { |
| super(type); |
| if (!OpType.isFunction(type)) { |
| throw new IllegalArgumentException("FunctionExpr cannot accept " + type + "type"); |
| } |
| this.signature = signature.toLowerCase(); |
| setParams(params); |
| } |
| |
| public String getSignature() { |
| return this.signature; |
| } |
| |
| public boolean hasParams() { |
| return params != null; |
| } |
| |
| public Expr[] getParams() { |
| return params; |
| } |
| |
| public void setParams(Expr[] params) { |
| this.params = params; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(signature, Objects.hashCode(params)); |
| } |
| |
| @Override |
| boolean equalsTo(Expr expr) { |
| FunctionExpr another = (FunctionExpr) expr; |
| return signature.equals(another.signature) && |
| TUtil.checkEquals(params, another.params); |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException { |
| FunctionExpr func = (FunctionExpr) super.clone(); |
| func.signature = signature; |
| if (params != null) { |
| func.params = new Expr[params.length]; |
| for (int i = 0; i < params.length; i++) { |
| func.params[i] = (Expr) params[i].clone(); |
| } |
| } |
| return func; |
| } |
| } |