com.zaxxer.sansorm.internal.OrmBase Maven / Gradle / Ivy

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/*
 Copyright 2012, Brett Wooldridge

   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 com.zaxxer.sansorm.internal;

import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.codehaus.plexus.util.CollectionUtils;


/**
 * OrmBase
 */
class OrmBase
{
    private static Map csvCache;

    static
    {
        csvCache = new ConcurrentHashMap();
    }

    protected OrmBase()
    {
        // protected constructor
    }

    protected static final void populateStatementParameters(PreparedStatement stmt, Object... args) throws SQLException
    {
        ParameterMetaData parameterMetaData = stmt.getParameterMetaData();
        final int paramCount = parameterMetaData.getParameterCount();
        if (paramCount > 0 && args.length < paramCount)
        {
            throw new RuntimeException("Too few parameters supplied for query");
        }

        for (int column = paramCount; column > 0; column--)
        {
            int parameterType = parameterMetaData.getParameterType(column);
            Object object = mapSqlType(args[column - 1], parameterType);
            stmt.setObject(column, object, parameterType);
        }
    }

    public static final  String getColumnsCsv(Class clazz, String... tablePrefix)
    {
        String cacheKey = (tablePrefix == null || tablePrefix.length == 0 ? clazz.getName() : tablePrefix[0] + clazz.getName());

        String columnCsv = csvCache.get(cacheKey);
        if (columnCsv == null)
        {
            Introspected introspected = Introspector.getIntrospected(clazz);
            StringBuilder sb = new StringBuilder();
            String[] columnNames = introspected.getColumnNames();
            String[] columnTableNames = introspected.getColumnTableNames();
            for (int i = 0; i < columnNames.length; i++)
            {
                String column = columnNames[i];
                String columnTableName = columnTableNames[i];

                if (columnTableName != null)
                {
                    sb.append(columnTableName).append('.');
                }
                else if (tablePrefix.length > 0)
                {
                    sb.append(tablePrefix[0]).append('.');
                }

                sb.append(column).append(',');
            }

            columnCsv = sb.deleteCharAt(sb.length() - 1).toString();
            csvCache.put(cacheKey, columnCsv);
        }

        return columnCsv;
    }

    public static final  String getColumnsCsvExclude(Class clazz, String...excludeColumns)
    {
        Set excludes = new HashSet(Arrays.asList(excludeColumns));

        Introspected introspected = Introspector.getIntrospected(clazz);
        StringBuilder sb = new StringBuilder();
        String[] columnNames = introspected.getColumnNames();
        String[] columnTableNames = introspected.getColumnTableNames();
        for (int i = 0; i < columnNames.length; i++)
        {
            String column = columnNames[i];
            if (excludes.contains(column))
            {
                continue;
            }

            String columnTableName = columnTableNames[i];

            if (columnTableName != null)
            {
                sb.append(columnTableName).append('.');
            }

            sb.append(column).append(',');
        }

        return sb.deleteCharAt(sb.length() - 1).toString();
    }

    protected static final Object mapSqlType(Object object, int sqlType)
    {
        switch (sqlType)
        {
        case Types.TIMESTAMP:
            if (object instanceof java.util.Date)
            {
                return new Timestamp(((java.util.Date) object).getTime());
            }
            break;
        case Types.DECIMAL:
            if (object instanceof BigInteger)
            {
                return new BigDecimal(((BigInteger) object));
            }
            break;
        case Types.SMALLINT:
            if (object instanceof Boolean)
            {
                return (((Boolean) object) ? (short) 1 : (short) 0);
            }
            break;
        default:
            break;
        }

        return object;
    }
}