package liquibase.precondition.core;
import liquibase.changelog.DatabaseChangeLog;
import liquibase.changelog.ChangeSet;
import liquibase.database.Database;
import liquibase.precondition.AbstractPrecondition;
import liquibase.snapshot.SnapshotGeneratorFactory;
import liquibase.snapshot.SnapshotGeneratorFactory;
import liquibase.structure.core.Schema;
import liquibase.exception.*;
import liquibase.precondition.Precondition;
import liquibase.structure.core.View;
public class ViewExistsPrecondition extends AbstractPrecondition {
private String catalogName;
private String schemaName;
private String viewName;
public String getCatalogName() {
return catalogName;
}
public void setCatalogName(String catalogName) {
this.catalogName = catalogName;
}
public String getSchemaName() {
return schemaName;
}
public void setSchemaName(String schemaName) {
this.schemaName = schemaName;
}
public String getViewName() {
return viewName;
}
public void setViewName(String viewName) {
this.viewName = viewName;
}
@Override
public Warnings warn(Database database) {
return new Warnings();
}
@Override
public ValidationErrors validate(Database database) {
return new ValidationErrors();
}
@Override
public void check(Database database, DatabaseChangeLog changeLog, ChangeSet changeSet) throws PreconditionFailedException, PreconditionErrorException {
String currentSchemaName;
String currentCatalogName;
try {
currentCatalogName = getCatalogName();
currentSchemaName = getSchemaName();
if (!SnapshotGeneratorFactory.getInstance().has(new View().setName(getViewName()).setSchema(new Schema(currentCatalogName, currentSchemaName)), database)) {
throw new PreconditionFailedException("View "+database.escapeTableName(currentCatalogName, currentSchemaName, getViewName())+" does not exist", changeLog, this);
}
} catch (PreconditionFailedException e) {
throw e;
} catch (Exception e) {
throw new PreconditionErrorException(e, changeLog, this);
}
}
@Override
public String getSerializedObjectNamespace() {
return STANDARD_CHANGELOG_NAMESPACE;
}
@Override
public String getName() {
return "viewExists";
}
}