/*
* Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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 GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj;
import java.util.
LinkedList;
import com.mysql.cj.util.
StringUtils;
public class
AppendingBatchVisitor implements
BatchVisitor {
LinkedList<byte[]>
statementComponents = new
LinkedList<>();
public
BatchVisitor append(byte[]
values) {
this.
statementComponents.
addLast(
values);
return this;
}
public
BatchVisitor increment() {
// no-op
return this;
}
public
BatchVisitor decrement() {
this.
statementComponents.
removeLast();
return this;
}
public
BatchVisitor merge(byte[]
front, byte[]
back) {
int
mergedLength =
front.length +
back.length;
byte[]
merged = new byte[
mergedLength];
System.
arraycopy(
front, 0,
merged, 0,
front.length);
System.
arraycopy(
back, 0,
merged,
front.length,
back.length);
this.
statementComponents.
addLast(
merged);
return this;
}
@
Override
public
BatchVisitor mergeWithLast(byte[]
values) {
if (this.
statementComponents.
isEmpty()) {
return
append(
values);
}
return
merge(this.
statementComponents.
removeLast(),
values);
}
public byte[][]
getStaticSqlStrings() {
byte[][]
asBytes = new byte[this.
statementComponents.
size()][];
this.
statementComponents.
toArray(
asBytes);
return
asBytes;
}
@
Override
public
String toString() {
StringBuilder sb = new
StringBuilder();
for (byte[]
comp : this.
statementComponents) {
sb.
append(
StringUtils.
toString(
comp));
}
return
sb.
toString();
}
}