/* Copyright (c) 2001-2017, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb;
import org.hsqldb.
HsqlNameManager.
HsqlName;
import org.hsqldb.error.
Error;
import org.hsqldb.error.
ErrorCode;
import org.hsqldb.lib.
OrderedHashSet;
import org.hsqldb.result.
Result;
/**
* Implementation of Statement for simple PSM control statements.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.3
* @since 1.9.0
*/
public class
StatementSimple extends
Statement {
HsqlName label;
StatementSimple(int
type,
HsqlName label) {
super(
type,
StatementTypes.
X_SQL_CONTROL);
references = new
OrderedHashSet();
isTransactionStatement = false;
this.
label =
label;
}
public
String getSQL() {
StringBuffer sb = new
StringBuffer();
switch (
type) {
case
StatementTypes.
ITERATE :
sb.
append(
Tokens.
T_ITERATE).
append(' ').
append(
label);
break;
case
StatementTypes.
LEAVE :
sb.
append(
Tokens.
T_LEAVE).
append(' ').
append(
label);
break;
}
return
sb.
toString();
}
protected
String describe(
Session session, int
blanks) {
StringBuffer sb = new
StringBuffer();
sb.
append('\n');
for (int
i = 0;
i <
blanks;
i++) {
sb.
append(' ');
}
sb.
append(
Tokens.
T_STATEMENT);
return
sb.
toString();
}
public
Result execute(
Session session) {
Result result;
try {
result =
getResult(
session);
} catch (
Throwable t) {
result =
Result.
newErrorResult(
t);
}
if (
result.
isError()) {
result.
getException().
setStatementType(
group,
type);
}
return
result;
}
Result getResult(
Session session) {
switch (
type) {
case
StatementTypes.
ITERATE :
case
StatementTypes.
LEAVE :
return
Result.
newPSMResult(
type,
label.
name, null);
default :
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "StatementSimple");
}
}
public void
resolve(
Session session) {
boolean
resolved = false;
switch (
type) {
case
StatementTypes.
ITERATE : {
StatementCompound statement =
parent;
while (
statement != null) {
if (
statement.
isLoop) {
if (
label == null) {
resolved = true;
break;
}
if (
statement.
label != null
&&
label.
name.
equals(
statement.
label.
name)) {
resolved = true;
break;
}
}
statement =
statement.
parent;
}
break;
}
case
StatementTypes.
LEAVE :
resolved = true;
break;
default :
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "StatementSimple");
}
if (!
resolved) {
throw
Error.
error(
ErrorCode.
X_42602);
}
}
public
String describe(
Session session) {
return "";
}
public boolean
isCatalogLock(int
model) {
return false;
}
public boolean
isCatalogChange() {
return false;
}
}