package liquibase.change.core;

 import liquibase.change.AbstractChange;

 import liquibase.change.ChangeMetaData;

 import liquibase.database.Database;

 import liquibase.statement.SqlStatement;

 import liquibase.statement.core.DropTableStatement;

 import liquibase.util.StringUtils;

 /**

  * Drops an existing table.

  */

 public class DropTableChange extends AbstractChange {

     private String schemaName;

     private String tableName;

     private Boolean cascadeConstraints;

     public DropTableChange() {

         super("dropTable", "Drop Table", ChangeMetaData.PRIORITY_DEFAULT);

     }

     public String getSchemaName() {

         return schemaName;

     }

     public void setSchemaName(String schemaName) {

         this.schemaName = StringUtils.trimToNull(schemaName);

     }

     public String getTableName() {

         return tableName;

     }

     public void setTableName(String tableName) {

         this.tableName = tableName;

     }

     public Boolean isCascadeConstraints() {

         return cascadeConstraints;

     }

     public void setCascadeConstraints(Boolean cascadeConstraints) {

         this.cascadeConstraints = cascadeConstraints;

     }

     public SqlStatement[] generateStatements(Database database) {

         boolean constraints = false;

         if (isCascadeConstraints() != null) {

             constraints = isCascadeConstraints();

         }

         return new SqlStatement[] { new DropTableStatement(getSchemaName() == null ? database.getDefaultSchemaName()

                 : getSchemaName(), getTableName(), constraints) };

     }

     public String getConfirmationMessage() {

         return "Table " + getTableName() + " dropped";

     }

 }