org.jooq.impl.Choose Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jooq Show documentation
There is a newer version: 3.19.18
/*
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package org.jooq.impl;

import static org.jooq.impl.DSL.choose;
import static org.jooq.impl.DSL.function;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.Names.N_CHOOSE;
import static org.jooq.impl.Tools.EMPTY_FIELD;

import org.jooq.CaseValueStep;
import org.jooq.CaseWhenStep;
import org.jooq.Context;
import org.jooq.DataType;
import org.jooq.Field;
import org.jooq.Function2;
import org.jooq.impl.QOM.UnmodifiableList;

/**
 * @author Lukas Eder
 */
final class Choose extends AbstractField implements QOM.Choose {

    private Field index;
    private Field[]     values;

    Choose(Field index, Field[] values) {
        super(N_CHOOSE, dataType(values));

        this.index = index;
        this.values = values;
    }

    @SuppressWarnings("unchecked")
    private static final  DataType dataType(Field[] values) {
        return values == null || values.length == 0 ? (DataType) SQLDataType.OTHER : values[0].getDataType();
    }

    @Override
    public final void accept(Context ctx) {
        switch (ctx.family()) {






            default: {
                CaseValueStep s = choose(index);
                CaseWhenStep when = null;

                for (int i = 0; i < values.length; i++) {
                    when = when == null
                        ? s.when(inline(i + 1), values[i])
                        : when.when(inline(i + 1), values[i]);
                }

                ctx.visit(when);
                break;
            }
        }
    }

    // -------------------------------------------------------------------------
    // XXX: Query Object Model
    // -------------------------------------------------------------------------

    @Override
    public final Field $arg1() {
        return index;
    }

    @Override
    public final UnmodifiableList> $arg2() {
        return QOM.unmodifiable(values);
    }

    @Override
    public final Function2, ? super UnmodifiableList>, ? extends Field> $constructor() {
        return (i, v) -> new Choose(i, (Field[]) v.toArray(EMPTY_FIELD));
    }
}