/*******************************************************************************
* Copyright (c) 1998, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.exceptions;
import java.util.*;
import java.io.*;
import org.eclipse.persistence.internal.helper.*;
import org.eclipse.persistence.internal.sessions.AbstractRecord;
import org.eclipse.persistence.internal.sessions.AbstractSession;
/**
* <p><b>Purpose</b>: IntegrityChecker is used for catching all the descriptor exceptions,
* and checking database tables. It gives the user options if he/she wants to
* catch descriptor exceptions, check database, and check InstantiationPolicy or not.
*/
public class IntegrityChecker implements Serializable {
/** To add all the Descriptor exceptions */
protected Vector caughtExceptions = null;
/** To load the tables from database */
protected Vector tables = null;
/** To know that should we catch all the descriptors exceptions or not */
protected boolean shouldCatchExceptions;
/** To know that should we check database tables or not */
protected boolean shouldCheckDatabase;
/** To know that should we check InstantiationPolicy or not */
protected boolean shouldCheckInstantiationPolicy;
/**
* PUBLIC:
* IntegrityChecker is used for catching all the Descriptor Exceptions,
* and check database tables. IntegrityChecker gives the option to the user that does he wants to
* catch all the descriptor exceptions,check database, and check InstantiationPolicy or not.
*/
public IntegrityChecker() {
super();
this.shouldCatchExceptions = true;
this.shouldCheckDatabase = false;
this.shouldCheckInstantiationPolicy = true;
}
/**
* PUBLIC:
* This method is used for catching all the Descriptor Exceptions
*/
public void catchExceptions() {
setShouldCatchExceptions(true);
}
/**
* PUBLIC:
* This method is used to check the database tables.
*/
public void checkDatabase() {
setShouldCheckDatabase(true);
}
/**
* PUBLIC:
* This method is used to check the InstantiationPolicy.
*/
public void checkInstantiationPolicy() {
setShouldCheckInstantiationPolicy(true);
}
/**
* INTERNAL:
* This method checks that tables are present in the database.
*/
public boolean checkTable(DatabaseTable table, AbstractSession session) {
if (getTables().size() == 0) {
// load the tables from the session
initializeTables(session);
}
boolean tableExists = getTables().contains(table.getName());
//Some DBs (e.g. some versions of MySQL) convert all the table names to lower case.
if (!tableExists && session.getPlatform().isMySQL()) {
return getTables().contains(table.getName().toLowerCase());
}
return tableExists;
}
/**
* PUBLIC:
* This method is used for don't catching all the Descriptor Exceptions
*/
public void dontCatchExceptions() {
setShouldCatchExceptions(false);
}
/**
* PUBLIC:
* This method is used for don't checking the database tables and fields.
*/
public void dontCheckDatabase() {
setShouldCheckDatabase(false);
}
/**
* PUBLIC:
* This method is used for don't checking the InstantiationPolicy.
*/
public void dontCheckInstantiationPolicy() {
setShouldCheckInstantiationPolicy(false);
}
/**
* PUBLIC:
* This method returns the vector which adds all the Descriptors Exceptions.
*/
public Vector getCaughtExceptions() {
if (caughtExceptions == null) {
caughtExceptions = new Vector();
}
return caughtExceptions;
}
/**
* INTERNAL:
* This method returns a vector which holds all the tables of database
*/
public Vector getTables() {
if (tables == null) {
tables = new Vector();
}
return tables;
}
/**
* INTERNAL:
* This method handles all the Descriptor Exceptions.
* This method will throw the exception or add the exceptions into a vector depending on the value of shouldCatchExceptions.
*/
public void handleError(RuntimeException runtimeException) {
if (!shouldCatchExceptions()) {
throw runtimeException;
}
getCaughtExceptions().addElement(runtimeException);
}
/**
* INTERNAL:
* Return if any errors occurred.
*/
public boolean hasErrors() {
if ((caughtExceptions != null) && (caughtExceptions.size() > 0)) {
return true;
}
return false;
}
/**
* INTERNAL:
* Return if any runtime errors occurred.
*/
public boolean hasRuntimeExceptions() {
if (hasErrors()) {
for (Enumeration exceptionsEnum = getCaughtExceptions().elements();
exceptionsEnum.hasMoreElements();) {
if (exceptionsEnum.nextElement() instanceof RuntimeException) {
return true;
}
}
}
return false;
}
/**
* INTERNAL:
* This method is used to get all the database tables and add them into a vector.
*/
public void initializeTables(AbstractSession session) {
List result = session.getAccessor().getTableInfo(null, null, null, null, session);
for (Iterator iterator = result.iterator(); iterator.hasNext();) {
AbstractRecord row = (AbstractRecord)iterator.next();
if (session.getPlatform().shouldForceFieldNamesToUpperCase()) {
this.tables.add(((String)row.get("TABLE_NAME")).toUpperCase());
} else {
this.tables.add(row.get("TABLE_NAME"));
}
}
}
/**
* INTERNAL:
*/
public void setCaughtExceptions(Vector exceptions) {
this.caughtExceptions = exceptions;
}
/**
* PUBLIC:
* This method assigns the value to the variable (shouldCatchExceptions)
* that defines whether we should catch all Descriptor Exceptions or not.
*/
public void setShouldCatchExceptions(boolean answer) {
shouldCatchExceptions = answer;
}
/**
* PUBLIC:
* This method assigns the value to the variable (shouldCheckDatabase)
* that defines whether we should check the database or not.
*/
public void setShouldCheckDatabase(boolean answer) {
shouldCheckDatabase = answer;
}
/**
* PUBLIC:
* This method assigns the value to the variable (shouldCheckInstantiationPolicy)
* that defines whether we should check InstantiationPolicy or not.
*/
public void setShouldCheckInstantiationPolicy(boolean answer) {
shouldCheckInstantiationPolicy = answer;
}
/**
* PUBLIC:
* This method signifies whether all Descriptor Exceptions should be thrown individually or queued.
*/
public boolean shouldCatchExceptions() {
return shouldCatchExceptions;
}
/**
* PUBLIC:
* This method signifies whether database tables and fields should be checked or not.
*/
public boolean shouldCheckDatabase() {
return shouldCheckDatabase;
}
/**
* PUBLIC:
* This method tells us whether we should check InstantiationPolicy or not.
*/
public boolean shouldCheckInstantiationPolicy() {
return shouldCheckInstantiationPolicy;
}
}