com.orm.androrm.migration.RenameRelationMigration.java Source code

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Here is the source code for com.orm.androrm.migration.RenameRelationMigration.java

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/**
 *    Copyright (c) 2012 Philipp Giese
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.orm.androrm.migration;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang3.StringUtils;

import android.content.Context;
import android.database.SQLException;

import com.orm.androrm.DatabaseAdapter;
import com.orm.androrm.DatabaseBuilder;
import com.orm.androrm.Model;

/**
 * This migration will make sure that all relational tables, that belong
 * to a certain model are renamed to fit to the new name of the model. 
 * 
 * @author Philipp Giese
 *
 * @param <T>   Type of the model, that will be renamed. 
 */
public class RenameRelationMigration<T extends Model> extends RenameModelMigration<T> {

    protected RenameRelationMigration(String oldName) {
        super(oldName, "rename_relation");
    }

    @Override
    public boolean execute(Context context, Class<T> model) {
        MigrationHelper helper = new MigrationHelper(context);

        List<String> tables = helper.getRelationTableNames(mOldName);
        String newName = DatabaseBuilder.getTableName(model);

        mValue = StringUtils.join(tables, ",");

        if (isApplied(model, context)) {
            return false;
        }

        DatabaseAdapter adapter = DatabaseAdapter.getInstance(context);

        for (String table : tables) {
            List<String> parts = Arrays.asList(table.replace(mOldName, newName).split("_"));
            Collections.sort(parts);

            String name = StringUtils.join(parts, "_");

            try {
                adapter.renameTable(table, name);
            } catch (SQLException e) {
                return false;
            }
        }

        return true;
    }

    @Override
    public String getValue(Class<T> model) {
        return mValue;
    }

}