package liquibase.precondition.core; import liquibase.changelog.DatabaseChangeLog; import liquibase.changelog.ChangeSet; import liquibase.database.Database; import liquibase.exception.*; import liquibase.precondition.Precondition; import liquibase.snapshot.DatabaseSnapshot; import liquibase.snapshot.DatabaseSnapshotGeneratorFactory; import liquibase.util.StringUtils; public class ViewExistsPrecondition implements Precondition { private String schemaName; private String viewName; public String getSchemaName() { return schemaName; } public void setSchemaName(String schemaName) { this.schemaName = StringUtils.trimToNull(schemaName); } public String getViewName() { return viewName; } public void setViewName(String viewName) { this.viewName = viewName; } public Warnings warn(Database database) { return new Warnings(); } public ValidationErrors validate(Database database) { return new ValidationErrors(); } public void check(Database database, DatabaseChangeLog changeLog, ChangeSet changeSet) throws PreconditionFailedException, PreconditionErrorException { try { if (!DatabaseSnapshotGeneratorFactory.getInstance().getGenerator(database).hasView(getSchemaName(), getViewName(), database)) { throw new PreconditionFailedException("View "+database.escapeTableName(getSchemaName(), getViewName())+" does not exist", changeLog, this); } } catch (PreconditionFailedException e) { throw e; } catch (Exception e) { throw new PreconditionErrorException(e, changeLog, this); } } public String getName() { return "viewExists"; } }