1 /*
2 * Copyright 2020-2022 Foreseeti AB <https://foreseeti.com>
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.mal_lang.langspec.builders.step;
18
19 import static java.util.Objects.requireNonNull;
20
21 import jakarta.json.JsonObject;
22
23 /**
24 * A builder for creating {@link org.mal_lang.langspec.step.StepBinaryOperation} objects.
25 *
26 * @since 1.0.0
27 */
28 public abstract class StepBinaryOperationBuilder extends StepExpressionBuilder {
29 private final StepExpressionBuilder lhs;
30 private final StepExpressionBuilder rhs;
31
32 /**
33 * Constructs a new {@code StepBinaryOperationBuilder} object.
34 *
35 * @param lhs the left-hand side of the binary operation
36 * @param rhs the right-hand side of the binary operation
37 * @throws java.lang.NullPointerException if {@code lhs} or {@code rhs} is {@code null}
38 * @since 1.0.0
39 */
40 protected StepBinaryOperationBuilder(StepExpressionBuilder lhs, StepExpressionBuilder rhs) {
41 this.lhs = requireNonNull(lhs);
42 this.rhs = requireNonNull(rhs);
43 }
44
45 /**
46 * Returns the left-hand side of this {@code StepBinaryOperationBuilder} object.
47 *
48 * @return the left-hand side of this {@code StepBinaryOperationBuilder} object
49 * @since 1.0.0
50 */
51 public StepExpressionBuilder getLhs() {
52 return this.lhs;
53 }
54
55 /**
56 * Returns the right-hand side of this {@code StepBinaryOperationBuilder} object.
57 *
58 * @return the right-hand side of this {@code StepBinaryOperationBuilder} object
59 * @since 1.0.0
60 */
61 public StepExpressionBuilder getRhs() {
62 return this.rhs;
63 }
64
65 /**
66 * Creates a new {@code StepBinaryOperationBuilder} from a {@link jakarta.json.JsonObject}.
67 *
68 * @param jsonStepBinaryOperation the {@link jakarta.json.JsonObject}
69 * @return a new {@code StepBinaryOperationBuilder}
70 * @throws java.lang.NullPointerException if {@code jsonStepBinaryOperation} is {@code null}
71 * @since 1.0.0
72 */
73 public static StepBinaryOperationBuilder fromJson(JsonObject jsonStepBinaryOperation) {
74 requireNonNull(jsonStepBinaryOperation);
75 var lhs = StepExpressionBuilder.fromJson(jsonStepBinaryOperation.getJsonObject("lhs"));
76 var rhs = StepExpressionBuilder.fromJson(jsonStepBinaryOperation.getJsonObject("rhs"));
77 switch (jsonStepBinaryOperation.getString("type")) {
78 case "union":
79 return new StepUnionBuilder(lhs, rhs);
80 case "intersection":
81 return new StepIntersectionBuilder(lhs, rhs);
82 case "difference":
83 return new StepDifferenceBuilder(lhs, rhs);
84 case "collect":
85 return new StepCollectBuilder(lhs, rhs);
86 default:
87 throw new RuntimeException(
88 String.format(
89 "Invalid step expression type \"%s\"", jsonStepBinaryOperation.getString("type")));
90 }
91 }
92 }