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Helidon Database Client API
There is a newer version: 4.1.4
/*
 * Copyright (c) 2023 Oracle and/or its affiliates.
 *
 * 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.helidon.dbclient;

import java.util.Optional;
import java.util.function.Function;

import io.helidon.common.GenericType;
import io.helidon.common.mapper.MapperException;
import io.helidon.common.mapper.MapperManager;
import io.helidon.common.mapper.Value;

/**
 * Base {@link DbColumn} implementation.
 */
public abstract class DbColumnBase implements DbColumn {

    private final Object value;
    private final MapperManager mapperManager;
    private final String[] mappingQualifiers;

    /**
     * Create a new instance.
     *
     * @param value             value
     * @param mapperManager     mapper manager
     * @param mappingQualifiers mapping qualifiers
     */
    protected DbColumnBase(Object value, MapperManager mapperManager, String... mappingQualifiers) {
        this.value = value;
        this.mapperManager = mapperManager;
        this.mappingQualifiers = mappingQualifiers;
    }

    /**
     * Get raw value of the database column.
     *
     * @return raw value of the column
     */
    protected Object rawValue() {
        return value;
    }

    @Override
    public  T get(Class type) throws MapperException {
        if (null == value) {
            return null;
        }
        if (type.isAssignableFrom(value.getClass())) {
            return type.cast(value);
        }
        return map(value, type);
    }

    @Override
    public  T get(GenericType type) throws MapperException {
        if (null == value) {
            return null;
        }
        if (type.isClass()) {
            Class theClass = type.rawType();
            if (theClass.isAssignableFrom(value.getClass())) {
                return type.cast(value);
            }
        }
        return map(value, type);
    }

    @Override
    public  Value as(Class type) throws MapperException {
        return Value.create(mapperManager, name(), get(type), "dbclient", "column");
    }

    @Override
    public  Value as(GenericType type) throws MapperException {
        return Value.create(mapperManager, name(), get(type), "dbclient", "column");
    }

    @Override
    public  Value as(Function mapper) {
        return Value.create(mapperManager, name(), mapper.apply(value), "dbclient", "column");
    }

    @Override
    public Optional