org.jooq.Comparator Maven / Gradle / Ivy
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
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* http://www.apache.org/licenses/LICENSE-2.0
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* commercial database integrations.
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* For more information, please visit: http://www.jooq.org/licenses
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package org.jooq;
// ...
import static org.jooq.SQLDialect.FIREBIRD;
import static org.jooq.SQLDialect.POSTGRES;
import org.jooq.impl.DSL;
import org.jetbrains.annotations.NotNull;
/**
* A comparator to be used in conditions to form comparison predicates.
*
* Comparison operators listed here can be used to compare {@link Field} or
* {@link Row} values with other {@link Field} or {@link Row} values, or with
* {@link Select} or {@link QuantifiedSelect} values.
*
* The following flags indicate whether the comparator can be used as:
*
* - a quantified comparison operator: {@link #supportsQuantifier()}. Example:
*
X = ANY (A, B, C)
* - a subselect comparison operator: {@link #supportsSubselect()}. Example:
*
X = (SELECT A)
*
*
* @author Lukas Eder
*/
public enum Comparator {
@NotNull
@Support
IN("in", false, true, false),
@NotNull
@Support
NOT_IN("not in", false, true, false),
@NotNull
@Support
EQUALS("=", true, true, false),
@NotNull
@Support
NOT_EQUALS("<>", true, true, false),
@NotNull
@Support
LESS("<", true, true, false),
@NotNull
@Support
LESS_OR_EQUAL("<=", true, true, false),
@NotNull
@Support
GREATER(">", true, true, false),
@NotNull
@Support
GREATER_OR_EQUAL(">=", true, true, false),
@NotNull
@Support
IS_DISTINCT_FROM("is distinct from", false, false, true),
@NotNull
@Support
IS_NOT_DISTINCT_FROM("is not distinct from", false, false, true),
@NotNull
@Support
LIKE("like", false, false, false),
@NotNull
@Support
NOT_LIKE("not like", false, false, false),
@NotNull
@Support({ FIREBIRD, POSTGRES })
SIMILAR_TO("similar to", false, false, false),
@NotNull
@Support({ FIREBIRD, POSTGRES })
NOT_SIMILAR_TO("not similar to", false, false, false),
@NotNull
@Support
LIKE_IGNORE_CASE("ilike", false, false, false),
@NotNull
@Support
NOT_LIKE_IGNORE_CASE("not ilike", false, false, false),
;
private final String sql;
private final Keyword keyword;
private final boolean supportsQuantifier;
private final boolean supportsSubselect;
private final boolean supportsNulls;
private Comparator(String sql, boolean supportsQuantifier, boolean supportsSubselect, boolean supportsNulls) {
this.sql = sql;
this.keyword = DSL.keyword(sql);
this.supportsQuantifier = supportsQuantifier;
this.supportsSubselect = supportsSubselect;
this.supportsNulls = supportsNulls;
}
/**
* A SQL rendition of this comparator.
*/
public String toSQL() {
return sql;
}
/**
* A keyword rendition of this comparator.
*/
public Keyword toKeyword() {
return keyword;
}
/**
* Get the inverse comparator such that A [op] B and
* NOT(A [inverse op] B).
*/
public Comparator inverse() {
switch (this) {
case EQUALS: return NOT_EQUALS;
case GREATER: return LESS_OR_EQUAL;
case GREATER_OR_EQUAL: return LESS;
case IN: return NOT_IN;
case IS_DISTINCT_FROM: return IS_NOT_DISTINCT_FROM;
case IS_NOT_DISTINCT_FROM: return IS_DISTINCT_FROM;
case LESS: return GREATER_OR_EQUAL;
case LESS_OR_EQUAL: return GREATER;
case LIKE: return NOT_LIKE;
case LIKE_IGNORE_CASE: return NOT_LIKE_IGNORE_CASE;
case NOT_EQUALS: return EQUALS;
case NOT_IN: return IN;
case NOT_LIKE: return LIKE;
case NOT_LIKE_IGNORE_CASE: return LIKE_IGNORE_CASE;
case NOT_SIMILAR_TO: return SIMILAR_TO;
case SIMILAR_TO: return NOT_SIMILAR_TO;
default: throw new IllegalStateException();
}
}
/**
* Get the mirrored comparator such that A [op] B and
* B [mirrored op] A, or null if the comparator
* cannot be mirrored.
*/
public Comparator mirror() {
switch (this) {
case EQUALS: return EQUALS;
case GREATER: return LESS;
case GREATER_OR_EQUAL: return LESS_OR_EQUAL;
case IS_DISTINCT_FROM: return IS_DISTINCT_FROM;
case IS_NOT_DISTINCT_FROM: return IS_NOT_DISTINCT_FROM;
case LESS: return GREATER;
case LESS_OR_EQUAL: return GREATER_OR_EQUAL;
case NOT_EQUALS: return NOT_EQUALS;
default: return null;
}
}
/**
* Whether this comparator supports quantifiers on the right-hand side.
*
* @deprecated - 3.14.0 - [#9911] - This method is no longer supported.
*/
@Deprecated(forRemoval = true, since = "3.14")
public final boolean supportsNulls() {
return supportsNulls;
}
/**
* Whether this comparator supports quantifiers on the right-hand side.
*
* @deprecated - 3.14.0 - [#9911] - This method is no longer supported.
*/
@Deprecated(forRemoval = true, since = "3.14")
public boolean supportsQuantifier() {
return supportsQuantifier;
}
/**
* Whether this comparator supports subselects on the right-hand side.
*
* @deprecated - 3.14.0 - [#9911] - This method is no longer supported.
*/
@Deprecated(forRemoval = true, since = "3.14")
public boolean supportsSubselect() {
return supportsSubselect;
}
}