15346133148

Committed 30 May 2025 11:50AM UTC coverage: 70.397% (+0.1%) from 70.298%

Build # 15346133148

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push

github

Committed by

torand

Commit Message

chore: test javadoc publish

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235 of 420 branches covered (55.95%)

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1237 of 1671 relevant lines covered (74.03%)

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95.83

/src/main/java/io/github/torand/fastersql/model/Column.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.model;

import io.github.torand.fastersql.alias.ColumnAlias;
import io.github.torand.fastersql.expression.Expression;
import io.github.torand.fastersql.join.Join;
import io.github.torand.fastersql.order.OrderExpression;
import io.github.torand.fastersql.predicate.LeftOperand;
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.fastersql.sql.Command.SELECT;
import static io.github.torand.fastersql.util.contract.Requires.requireNonBlank;
import static java.util.Objects.requireNonNull;

/**
 * A column in a database table.
 */
public class Column implements LeftOperand, Expression, OrderExpression {
    private final Table<?> table;
    private final String name;
    private final ColumnAlias alias;

    /**
     * Creates a representation of a column inside a database table.
     * @param table the table representation.
     * @param name the column name.
     */
    public Column(Table<?> table, String name) {
        this.table = requireNonNull(table, "No table specified");
        this.name = requireNonBlank(name, "No name specified");
        this.alias = defaultAlias(table, name);
    }

    private Column(Table<?> table, String name, String alias) {
        this.table = requireNonNull(table, "No table specified");
        this.name = requireNonBlank(name, "No name specified");
        this.alias = new ColumnAlias(requireNonBlank(alias, "No alias specified"));
    }

    /**
     * Creates a JOIN clause by associating this column with specified column of another table.
     * @param other the other column.
     * @return the JOIN clause.
     */
    public Join on(Column other) {
        return new Join(this, other);
    }

    /**
     * Gets the column name.
     * @return the column name.
     */
    public String name() {
        return name;
    }

    /**
     * Gets the table this column belongs to.
     * @return the table.
     */
    public Table<?> table() {
        return table;
    }

    // Sql

    @Override
    public String sql(Context context) {
        if (context.isCommand(SELECT)) {
            return table.alias().name() + "." + name;
        } else {
            return name;
        }
    }

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

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

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

    // Projection

    @Override
    public Projection as(String alias) {
        return new Column(table, name, alias);
    }

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

    private ColumnAlias defaultAlias(Table<?> table, String name) {
        return new ColumnAlias((table.alias().name() + "_" + name).toUpperCase());
    }
}

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.model;
17
18	import io.github.torand.fastersql.alias.ColumnAlias;
19	import io.github.torand.fastersql.expression.Expression;
20	import io.github.torand.fastersql.join.Join;
21	import io.github.torand.fastersql.order.OrderExpression;
22	import io.github.torand.fastersql.predicate.LeftOperand;
23	import io.github.torand.fastersql.projection.Projection;
24	import io.github.torand.fastersql.sql.Context;
25
26	import java.util.Optional;
27	import java.util.stream.Stream;
28
29	import static io.github.torand.fastersql.sql.Command.SELECT;
30	import static io.github.torand.fastersql.util.contract.Requires.requireNonBlank;
31	import static java.util.Objects.requireNonNull;
32
33	/**
34	* A column in a database table.
35	*/
36	public class Column implements LeftOperand, Expression, OrderExpression {
37	private final Table<?> table;
38	private final String name;
39	private final ColumnAlias alias;
40
41	/**
42	* Creates a representation of a column inside a database table.
43	* @param table the table representation.
44	* @param name the column name.
45	*/
46	public Column(Table<?> table, String name) {	2✔
47	this.table = requireNonNull(table, "No table specified");	6✔
48	this.name = requireNonBlank(name, "No name specified");	7✔
49	this.alias = defaultAlias(table, name);	6✔
50	}	1✔
51
52	private Column(Table<?> table, String name, String alias) {	2✔
53	this.table = requireNonNull(table, "No table specified");	6✔
54	this.name = requireNonBlank(name, "No name specified");	7✔
55	this.alias = new ColumnAlias(requireNonBlank(alias, "No alias specified"));	10✔
56	}	1✔
57
58	/**
59	* Creates a JOIN clause by associating this column with specified column of another table.
60	* @param other the other column.
61	* @return the JOIN clause.
62	*/
63	public Join on(Column other) {
64	return new Join(this, other);	6✔
65	}
66
67	/**
68	* Gets the column name.
69	* @return the column name.
70	*/
71	public String name() {
72	return name;	×
73	}
74
75	/**
76	* Gets the table this column belongs to.
77	* @return the table.
78	*/
79	public Table<?> table() {
80	return table;	3✔
81	}
82
83	// Sql
84
85	@Override
86	public String sql(Context context) {
87	if (context.isCommand(SELECT)) {	4✔
88	return table.alias().name() + "." + name;	8✔
89	} else {
90	return name;	3✔
91	}
92	}
93
94	@Override
95	public Stream<Object> params(Context context) {
96	return Stream.empty();	2✔
97	}
98
99	@Override
100	public Stream<Column> columnRefs() {
101	return Stream.of(this);	3✔
102	}
103
104	@Override
105	public Stream<ColumnAlias> aliasRefs() {
106	return Stream.of(alias);	4✔
107	}
108
109	// Projection
110
111	@Override
112	public Projection as(String alias) {
113	return new Column(table, name, alias);	9✔
114	}
115
116	@Override
117	public Optional<ColumnAlias> alias() {
118	return Optional.ofNullable(alias);	4✔
119	}
120
121	private ColumnAlias defaultAlias(Table<?> table, String name) {
122	return new ColumnAlias((table.alias().name() + "_" + name).toUpperCase());	10✔
123	}
124	}

torand / FasterSQL / 15346133148

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