/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.teiid.metadata;


import org.teiid.translator.ExecutionFactory;
import org.teiid.translator.TranslatorException;

/**
 * A hook for externalizing view, procedure, and other metadata.
 * 
 * One of the two load methods should be overriden.
 */
public abstract class MetadataRepository<F,C> {

	/**
	 * Loads the schema information for the vdb for the given schemaName. Loads table, procedures, functions, indexes etc.
	 * @param factory
	 * @param executionFactory may be null if loading a virtual source
	 * @param connectionFactory may be null if source is not available
	 * @param text the text used to configure the load
	 * @return
	 * @throws TranslatorException to indicate a recoverable error, otherwise a RuntimeException
	 */
	public void loadMetadata(MetadataFactory factory, ExecutionFactory<F, C> executionFactory, F connectionFactory, String text) throws TranslatorException {
		loadMetadata(factory, executionFactory, connectionFactory);
	}
	
	/**
	 * Loads the schema information for the vdb for the given schemaName. Loads table, procedures, functions, indexes etc.
	 * @param factory
	 * @param executionFactory may be null if loading a virtual source
	 * @param connectionFactory may be null if source is not available
	 * @return
	 * @throws TranslatorException to indicate a recoverable error, otherwise a RuntimeException
	 */
	public void loadMetadata(MetadataFactory factory, ExecutionFactory<F, C> executionFactory, F connectionFactory) throws TranslatorException {
		
	}
	
	/**
	 * Call back function, when "alter view" definition is called 
	 * @param vdbName
	 * @param vdbVersion
	 * @param table
	 * @param viewDefinition
	 */
	public void setViewDefinition(String vdbName, String vdbVersion, Table table, String viewDefinition) {}
	
	/**
	 * Call back function, when "alter trigger" is called 
	 * @param vdbName
	 * @param vdbVersion
	 * @param table
	 * @param triggerOperation
	 * @param triggerDefinition
	 */
	public void setInsteadOfTriggerDefinition(String vdbName, String vdbVersion, Table table, Table.TriggerEvent triggerOperation, String triggerDefinition) {}
	
	/**
	 * Callback function, when "alter trigger" is called to enable or disable a trigger
	 * @param vdbName
	 * @param vdbVersion
	 * @param table
	 * @param triggerOperation
	 * @param enabled
	 */
	public void setInsteadOfTriggerEnabled(String vdbName, String vdbVersion, Table table, Table.TriggerEvent triggerOperation, boolean enabled) {}
	
	
	/**
	 * Call back function, when "alter procedure" is called to set the procedure definition
	 * @param vdbName
	 * @param vdbVersion
	 * @param procedure
	 * @param procedureDefinition
	 */
	public void setProcedureDefinition(String vdbName, String vdbVersion, Procedure procedure, String procedureDefinition) {}
		
	/**
	 * Set the {@link TableStats} for the given table
	 * @param vdbName
	 * @param vdbVersion
	 * @param table
	 * @param tableStats
	 */
	public void setTableStats(String vdbName, String vdbVersion, Table table, TableStats tableStats) {}
	
	
	/**
	 * Set the {@link ColumnStats} for a given column
	 * @param vdbName
	 * @param vdbVersion
	 * @param column
	 * @param columnStats
	 */
	public void setColumnStats(String vdbName, String vdbVersion, Column column, ColumnStats columnStats) {}
	
	/**
	 * Set an extension metadata property for a given record.
	 * @param vdbName
	 * @param vdbVersion
	 * @param record
	 * @param name
	 * @param value
	 */
	public void setProperty(String vdbName, String vdbVersion, AbstractMetadataRecord record, String name, String value) {}
	
}
