package liquibase.change.core;

 import liquibase.change.AbstractChange;

 import liquibase.change.Change;

 import liquibase.change.ChangeMetaData;

 import liquibase.database.Database;

 import liquibase.database.core.DB2Database;

 import liquibase.statement.SqlStatement;

 import liquibase.statement.core.RenameTableStatement;

 import liquibase.statement.core.ReorganizeTableStatement;

 import liquibase.util.StringUtils;

 import java.util.ArrayList;

 import java.util.List;

 /**

  * Renames an existing table.

  */

 public class RenameTableChange extends AbstractChange {

     private String schemaName;

     private String oldTableName;

     private String newTableName;

     public RenameTableChange() {

         super("renameTable", "Rename Table", ChangeMetaData.PRIORITY_DEFAULT);

     }

     public String getSchemaName() {

         return schemaName;

     }

     public void setSchemaName(String schemaName) {

         this.schemaName = StringUtils.trimToNull(schemaName);

     }

     public String getOldTableName() {

         return oldTableName;

     }

     public void setOldTableName(String oldTableName) {

         this.oldTableName = oldTableName;

     }

     public String getNewTableName() {

         return newTableName;

     }

     public void setNewTableName(String newTableName) {

         this.newTableName = newTableName;

     }

     public SqlStatement[] generateStatements(Database database) {

         List<SqlStatement> statements = new ArrayList<SqlStatement>();

         String schemaName = getSchemaName() == null ? database.getDefaultSchemaName() : getSchemaName();

         statements.add(new RenameTableStatement(schemaName, getOldTableName(), getNewTableName()));

         if (database instanceof DB2Database) {

             statements.add(new ReorganizeTableStatement(schemaName, getNewTableName()));

         }

         return statements.toArray(new SqlStatement[statements.size()]);

     }

     @Override

     protected Change[] createInverses() {

         RenameTableChange inverse = new RenameTableChange();

         inverse.setSchemaName(getSchemaName());

         inverse.setOldTableName(getNewTableName());

         inverse.setNewTableName(getOldTableName());

         return new Change[] { inverse };

     }

     public String getConfirmationMessage() {

         return "Table " + oldTableName + " renamed to " + newTableName;

     }

 }