| /** |
| * 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; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| public class CaseWhenPredicate extends Expr { |
| @Expose @SerializedName("WhenExprs") |
| private List<WhenExpr> whens = new ArrayList<WhenExpr>(); |
| @Expose @SerializedName("ElseExpr") |
| private Expr elseResult; |
| |
| public CaseWhenPredicate() { |
| super(OpType.CaseWhen); |
| } |
| |
| public void addWhen(Expr condition, Expr result) { |
| whens.add(new WhenExpr(condition, result)); |
| } |
| |
| public Collection<WhenExpr> getWhens() { |
| return this.whens; |
| } |
| |
| public void setElseResult(Expr elseResult) { |
| this.elseResult = elseResult; |
| } |
| |
| public Expr getElseResult() { |
| return this.elseResult; |
| } |
| |
| public boolean hasElseResult() { |
| return elseResult != null; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(whens, elseResult); |
| } |
| |
| @Override |
| boolean equalsTo(Expr expr) { |
| CaseWhenPredicate another = (CaseWhenPredicate) expr; |
| return whens.equals(another.whens) && TUtil.checkEquals(elseResult, another.elseResult); |
| } |
| |
| @Override |
| public String toJson() { |
| return JsonHelper.toJson(this); |
| } |
| |
| public static class WhenExpr { |
| @Expose @SerializedName("Condition") |
| Expr condition; |
| @Expose @SerializedName("Result") |
| Expr result; |
| |
| public WhenExpr(Expr condition, Expr result) { |
| this.condition = condition; |
| this.result = result; |
| } |
| |
| public void setCondition(Expr condition) { |
| this.condition = condition; |
| } |
| |
| public Expr getCondition() { |
| return this.condition; |
| } |
| |
| public void setResult(Expr result) { |
| this.result = result; |
| } |
| |
| public Expr getResult() { |
| return this.result; |
| } |
| |
| public int hashCode() { |
| return Objects.hashCode(condition, result); |
| } |
| |
| public boolean equals(Object obj) { |
| if (obj instanceof WhenExpr) { |
| WhenExpr another = (WhenExpr) obj; |
| return TUtil.checkEquals(condition, another.condition) && TUtil.checkEquals(result, another.result); |
| } |
| |
| return false; |
| } |
| } |
| } |