/*
 * Copyright 2004-2013 the Seasar Foundation and the Others.
 *
 * 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 org.seasar.extension.jdbc.gen.internal.model;

import java.math.BigDecimal;
import java.util.Calendar;
import java.util.Date;

import javax.persistence.TemporalType;

import org.seasar.extension.jdbc.gen.desc.AttributeDesc;
import org.seasar.extension.jdbc.gen.model.AttributeModel;
import org.seasar.extension.jdbc.gen.model.AttributeModelFactory;
import org.seasar.framework.convention.PersistenceConvention;
import org.seasar.framework.util.ClassUtil;

/**
 * {@link AttributeModelFactory}の実装クラスです。
 * 
 * @author taedium
 */
public class AttributeModelFactoryImpl implements AttributeModelFactory {

    /** カラム名を表示する場合{@code true} */
    protected boolean showColumnName;

    /** カラム定義を表示する場合{@code true} */
    protected boolean showColumnDefinition;

    /** 永続化層の命名規約 */
    protected PersistenceConvention persistenceConvention;

    /** {@link TemporalType}を使用する場合{@code true} */
    protected boolean useTemporalType;

    /**
     * インスタンスを構築します。
     * 
     * @param showColumnName
     *            カラム名を表示する場合{@code true}
     * @param showColumnDefinition
     *            カラム定義を表示する場合{@code true}
     * @param useTemporalType
     *            {@link TemporalType}を使用する場合{@code true}
     * @param persistenceConvention
     *            永続化層の命名規約
     */
    public AttributeModelFactoryImpl(boolean showColumnName,
            boolean showColumnDefinition, boolean useTemporalType,
            PersistenceConvention persistenceConvention) {
        if (persistenceConvention == null) {
            throw new NullPointerException("persistenceConvention");
        }
        this.showColumnName = showColumnName;
        this.showColumnDefinition = showColumnDefinition;
        this.useTemporalType = useTemporalType;
        this.persistenceConvention = persistenceConvention;
    }

    public AttributeModel getAttributeModel(AttributeDesc attributeDesc) {
        AttributeModel attributeModel = new AttributeModel();
        attributeModel.setName(attributeDesc.getName());
        attributeModel.setId(attributeDesc.isId());
        attributeModel.setGenerationType(attributeDesc.getGenerationType());
        attributeModel.setInitialValue(attributeDesc.getInitialValue());
        attributeModel.setAllocationSize(attributeDesc.getAllocationSize());
        attributeModel.setLob(attributeDesc.isLob());
        attributeModel.setTransient(attributeDesc.isTransient());
        attributeModel.setVersion(attributeDesc.isVersion());
        attributeModel.setNullable(attributeDesc.isNullable());
        attributeModel.setUnique(attributeDesc.isUnique());
        attributeModel.setColumnTypeName(attributeDesc.getColumnTypeName());
        attributeModel.setComment(attributeDesc.getComment());
        doAttributeClass(attributeModel, attributeDesc);
        doColumnName(attributeModel, attributeDesc);
        if (showColumnDefinition) {
            doColumnDefinition(attributeModel, attributeDesc);
        } else {
            doLength(attributeModel, attributeDesc);
            doPrecision(attributeModel, attributeDesc);
            doScale(attributeModel, attributeDesc);
        }
        return attributeModel;
    }

    /**
     * 属性のクラスを処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doAttributeClass(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        TemporalType primaryTemporalType = attributeDesc
                .getPrimaryTemporalType();
        if (primaryTemporalType != null) {
            attributeModel.setTemporalType(primaryTemporalType);
            attributeModel.setAttributeClass(Date.class);
        } else if (useTemporalType && attributeDesc.isTemporal()) {
            attributeModel.setTemporalType(attributeDesc.getTemporalType());
            attributeModel.setAttributeClass(Date.class);
        } else {
            attributeModel.setAttributeClass(attributeDesc.getAttributeClass());
        }
    }

    /**
     * カラム名を処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doColumnName(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        String realColumnName = attributeDesc.getColumnName();
        String convertedColumnName = persistenceConvention
                .fromPropertyNameToColumnName(attributeModel.getName());
        if (showColumnName
                || !realColumnName.equalsIgnoreCase(convertedColumnName)) {
            attributeModel.setColumnName(realColumnName);
        }
    }

    /**
     * カラム定義を処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doColumnDefinition(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        attributeModel.setColumnDefinition(attributeDesc.getColumnDefinition());
        attributeModel.setUnsupportedColumnType(attributeDesc
                .isUnsupportedColumnType());
    }

    /**
     * 長さを処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doLength(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        if (attributeDesc.getLength() < 1) {
            return;
        }
        Class<?> clazz = ClassUtil.getWrapperClassIfPrimitive(attributeDesc
                .getAttributeClass());
        if (!Number.class.isAssignableFrom(clazz)
                && !Date.class.isAssignableFrom(clazz)
                && !Calendar.class.isAssignableFrom(clazz)) {
            attributeModel.setLength(attributeDesc.getLength());
        }
    }

    /**
     * 精度を処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doPrecision(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        if (attributeDesc.getPrecision() < 1) {
            return;
        }
        Class<?> clazz = ClassUtil.getWrapperClassIfPrimitive(attributeDesc
                .getAttributeClass());
        if (Number.class.isAssignableFrom(clazz)) {
            attributeModel.setPrecision(attributeDesc.getPrecision());
        }
    }

    /**
     * スケールを処理します。
     * 
     * @param attributeModel
     *            属性モデル
     * @param attributeDesc
     *            属性記述
     */
    protected void doScale(AttributeModel attributeModel,
            AttributeDesc attributeDesc) {
        if (attributeDesc.getScale() < 1) {
            return;
        }
        Class<?> clazz = ClassUtil.getWrapperClassIfPrimitive(attributeDesc
                .getAttributeClass());
        if (clazz == BigDecimal.class || clazz == Float.class
                || clazz == Double.class) {
            attributeModel.setScale(attributeDesc.getScale());
        }
    }
}
