jooq/jOOQ/src/main/java/org/jooq/impl/AbstractCondition.java

/*
 * 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
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 * Unless required by applicable law or agreed to in writing, software
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 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
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 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
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package org.jooq.impl;

import static org.jooq.Clause.CONDITION;
import static org.jooq.impl.DSL.condition;
import static org.jooq.impl.DSL.exists;
import static org.jooq.impl.DSL.notExists;

import java.util.function.BiFunction;

import org.jooq.Clause;
import org.jooq.Condition;
import org.jooq.Context;
import org.jooq.Field;
import org.jooq.QueryPart;
import org.jooq.SQL;
import org.jooq.Select;

/**
 * @author Lukas Eder
 */
abstract class AbstractCondition extends AbstractQueryPart implements Condition {
    private static final Clause[] CLAUSES          = { CONDITION };

    AbstractCondition() {}

    /**
     * [#10179] Subclasses may override this method to indicate that the
     * condition may produce <code>TRUE</code>, <code>FALSE</code>, or
     * <code>NULL</code>.
     */
    boolean isNullable() {
        return true;
    }

    @Override
    public Clause[] clauses(Context<?> ctx) {
        return CLAUSES;
    }

    @Override
    public final Condition and(Condition other) {
        return DSL.and(this, other);
    }

    /*
     * Subclasses may override this implementation when implementing
     * A BETWEEN B AND C
     */
    @Override
    public Condition and(Field<Boolean> other) {
        return and(condition(other));
    }

    @Override
    public final Condition or(Condition other) {
        return DSL.or(this, other);
    }

    @Override
    public final Condition or(Field<Boolean> other) {
        return or(condition(other));
    }

    @Override
    public final Condition and(SQL sql) {
        return and(condition(sql));
    }

    @Override
    public final Condition and(String sql) {
        return and(condition(sql));
    }

    @Override
    public final Condition and(String sql, Object... bindings) {
        return and(condition(sql, bindings));
    }

    @Override
    public final Condition and(String sql, QueryPart... parts) {
        return and(condition(sql, parts));
    }

    @Override
    public final Condition or(SQL sql) {
        return or(condition(sql));
    }

    @Override
    public final Condition or(String sql) {
        return or(condition(sql));
    }

    @Override
    public final Condition or(String sql, Object... bindings) {
        return or(condition(sql, bindings));
    }

    @Override
    public final Condition or(String sql, QueryPart... parts) {
        return or(condition(sql, parts));
    }

    @Override
    public final Condition andNot(Condition other) {
        return and(other.not());
    }

    @Override
    public final Condition andNot(Field<Boolean> other) {
        return andNot(condition(other));
    }

    @Override
    public final Condition orNot(Condition other) {
        return or(other.not());
    }

    @Override
    public final Condition orNot(Field<Boolean> other) {
        return orNot(condition(other));
    }

    @Override
    public final Condition andExists(Select<?> select) {
        return and(exists(select));
    }

    @Override
    public final Condition andNotExists(Select<?> select) {
        return and(notExists(select));
    }

    @Override
    public final Condition orExists(Select<?> select) {
        return or(exists(select));
    }

    @Override
    public final Condition orNotExists(Select<?> select) {
        return or(notExists(select));
    }

    @Override
    public /* non-final */ Condition not() {
        return new NotCondition(this);
    }

    static final Condition unwrapNot(Condition c, BiFunction<? super Condition, ? super Boolean, ? extends Condition> function) {
        boolean not = false;

        while (c instanceof NotCondition) {
            c = ((NotCondition) c).condition;
            not = !not;
        }

        return function.apply(c, not);
    }
}