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JDBC Driver for the Firebird RDBMS
/*
* Firebird Open Source JavaEE Connector - JDBC Driver
*
* Distributable under LGPL license.
* You may obtain a copy of the License at http://www.gnu.org/copyleft/lgpl.html
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* LGPL License for more details.
*
* This file was created by members of the firebird development team.
* All individual contributions remain the Copyright (C) of those
* individuals. Contributors to this file are either listed here or
* can be obtained from a source control history command.
*
* All rights reserved.
*/
package org.firebirdsql.jdbc;
import org.firebirdsql.gds.ISCConstants;
/**
* Strategy for quoting objects (or no quoting in the case of dialect 1).
*
* @since 2.2
*/
public enum QuoteStrategy {
/**
* Dialect 1 doesn't support quoting of object names.
*/
NO_QUOTES {
@Override
public StringBuilder appendQuoted(final String objectName, final StringBuilder sb) {
return sb.append(objectName);
}
@Override
public String quoteObjectName(String objectName) {
return objectName;
}
},
/**
* Dialect 3 (and 2) supports quoting of object names.
*/
QUOTES {
@Override
public StringBuilder appendQuoted(final String objectName, final StringBuilder sb) {
sb.append('"');
for (int i = 0; i < objectName.length(); i++) {
char currentChar = objectName.charAt(i);
// we have to double quote quotes
if (currentChar == '"') {
sb.append('"');
}
sb.append(currentChar);
}
sb.append('"');
return sb;
}
@Override
public String quoteObjectName(String objectName) {
return appendQuoted(objectName, new StringBuilder(objectName.length() + 2)).toString();
}
};
/**
* Appends the {@code objectName} with (or in the case of dialect 1: without) quotes to {@code sb}.
*
* @param objectName
* The object name to append
* @param sb
* StringBuilder for appending
* @return The StringBuilder for method chaining
*/
public abstract StringBuilder appendQuoted(String objectName, StringBuilder sb);
/**
* Returns the object name appropriately quoted according to this quote strategy.
*
* @param objectName
* The object name
* @return The transformed object name.
* @since 3.0.6
*/
public abstract String quoteObjectName(String objectName);
/**
* Obtain the {@link QuoteStrategy} for the specified dialect.
*
* @param dialect
* Dialect
* @return Appropriate {@link QuoteStrategy}
*/
public static QuoteStrategy forDialect(final int dialect) {
if (dialect == ISCConstants.SQL_DIALECT_V5) {
return NO_QUOTES;
}
return QUOTES;
}
}
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