16524838515

Committed 25 Jul 2025 02:47PM UTC coverage: 72.942% (+0.1%) from 72.847%

Build # 16524838515

Build Type

push

github

Committed by

torand

Commit Message

feat: add support for the negate operator

Run Details

233 of 378 branches covered (61.64%)

Branch coverage included in aggregate %.

15 of 16 new or added lines in 2 files covered. (93.75%)

1282 of 1699 relevant lines covered (75.46%)

3.98 hits per line

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80.95

/src/main/java/io/github/torand/fastersql/expression/arithmetic/Negate.java

/*
 * Copyright (c) 2024-2025 Tore Eide Andersen
 *
 * Licensed 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 io.github.torand.fastersql.expression.arithmetic;

import io.github.torand.fastersql.alias.ColumnAlias;
import io.github.torand.fastersql.expression.Expression;
import io.github.torand.fastersql.model.Column;
import io.github.torand.fastersql.order.OrderExpression;
import io.github.torand.fastersql.projection.Projection;
import io.github.torand.fastersql.sql.Context;

import java.util.Optional;
import java.util.stream.Stream;

import static io.github.torand.javacommons.contract.Requires.requireNonBlank;
import static io.github.torand.javacommons.lang.StringHelper.nonBlank;
import static java.util.Objects.requireNonNull;

/**
 * Implements the negate numerical function.
 */
public class Negate implements Expression, OrderExpression {
    private final Expression expression;
    private final ColumnAlias alias;

    Negate(Expression expression, String alias) {
        this.expression = requireNonNull(expression, "No expression specified");
        this.alias = nonBlank(alias) ? new ColumnAlias(alias) : defaultAlias();
    }

    // Sql

    @Override
    public String sql(Context context) {
        String exprSql = expression.sql(context);
        if (expression instanceof Addition || expression instanceof Subtraction) {
            exprSql = "(" + exprSql + ")";
        }

        return "-" + exprSql;
    }

    @Override
    public Stream<Object> params(Context context) {
        return expression.params(context);
    }

    @Override
    public Stream<Column> columnRefs() {
        return expression.columnRefs();
    }

    @Override
    public Stream<ColumnAlias> aliasRefs() {
        return expression.aliasRefs();
    }

    // Projection

    @Override
    public Projection as(String alias) {
        requireNonBlank(alias, "No alias specified");
        return new Negate(expression, alias);
    }

    @Override
    public Optional<ColumnAlias> alias() {
        return Optional.ofNullable(alias);
    }

    private ColumnAlias defaultAlias() {
        return ColumnAlias.generate("NEG_");
    }
}

1	/*
2	* Copyright (c) 2024-2025 Tore Eide Andersen
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	package io.github.torand.fastersql.expression.arithmetic;
17
18	import io.github.torand.fastersql.alias.ColumnAlias;
19	import io.github.torand.fastersql.expression.Expression;
20	import io.github.torand.fastersql.model.Column;
21	import io.github.torand.fastersql.order.OrderExpression;
22	import io.github.torand.fastersql.projection.Projection;
23	import io.github.torand.fastersql.sql.Context;
24
25	import java.util.Optional;
26	import java.util.stream.Stream;
27
28	import static io.github.torand.javacommons.contract.Requires.requireNonBlank;
29	import static io.github.torand.javacommons.lang.StringHelper.nonBlank;
30	import static java.util.Objects.requireNonNull;
31
32	/**
33	* Implements the negate numerical function.
34	*/
35	public class Negate implements Expression, OrderExpression {
36	private final Expression expression;
37	private final ColumnAlias alias;
38
39	Negate(Expression expression, String alias) {	2✔
40	this.expression = requireNonNull(expression, "No expression specified");	6✔
41	this.alias = nonBlank(alias) ? new ColumnAlias(alias) : defaultAlias();	12✔
42	}	1✔
43
44	// Sql
45
46	@Override
47	public String sql(Context context) {
48	String exprSql = expression.sql(context);	5✔
49	if (expression instanceof Addition \|\| expression instanceof Subtraction) {	4!
50	exprSql = "(" + exprSql + ")";	3✔
51	}
52
53	return "-" + exprSql;	3✔
54	}
55
56	@Override
57	public Stream<Object> params(Context context) {
58	return expression.params(context);	5✔
59	}
60
61	@Override
62	public Stream<Column> columnRefs() {
63	return expression.columnRefs();	4✔
64	}
65
66	@Override
67	public Stream<ColumnAlias> aliasRefs() {
NEW 68	return expression.aliasRefs();	×
69	}
70
71	// Projection
72
73	@Override
74	public Projection as(String alias) {
75	requireNonBlank(alias, "No alias specified");	6✔
76	return new Negate(expression, alias);	7✔
77	}
78
79	@Override
80	public Optional<ColumnAlias> alias() {
81	return Optional.ofNullable(alias);	4✔
82	}
83
84	private ColumnAlias defaultAlias() {
85	return ColumnAlias.generate("NEG_");	3✔
86	}
87	}

torand / FasterSQL / 16524838515

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