package org.tmatesoft.svn.core.internal.wc17.db.statement;
import org.tmatesoft.sqljet.core.SqlJetException;
import org.tmatesoft.svn.core.SVNException;
import org.tmatesoft.svn.core.internal.db.SVNSqlJetDb;
import org.tmatesoft.svn.core.internal.db.SVNSqlJetSelectFieldsStatement;
import org.tmatesoft.svn.core.internal.db.SVNSqlJetSelectStatement;
import org.tmatesoft.svn.core.internal.db.SVNSqlJetStatement;
import org.tmatesoft.svn.core.internal.wc17.db.SvnWcDbStatementUtil;
/**
*
* SELECT n.checksum, md5_checksum, size
* FROM nodes_current n
* LEFT JOIN pristine p ON n.checksum = p.checksum
* WHERE wc_id = ?1
* AND n.local_relpath = ?2
* AND n.checksum IS NOT NULL
* UNION ALL
* SELECT n.checksum, md5_checksum, size
* FROM nodes n
* LEFT JOIN pristine p ON n.checksum = p.checksum
* WHERE wc_id = ?1
* AND IS_STRICT_DESCENDANT_OF(n.local_relpath, ?2)
* AND op_depth >=
* (SELECT MAX(op_depth) FROM nodes WHERE wc_id = ?1 AND local_relpath = ?2)
* AND n.checksum IS NOT NULL
*
* @version 1.8
*/
public class SVNWCDbSelectCopyPristines extends SVNSqlJetSelectStatement {
private boolean firstPartOfUnion = true;
private long maxOpDepth;
private SVNSqlJetStatement joinedStatement;
public SVNWCDbSelectCopyPristines(SVNSqlJetDb sDb) throws SVNException {
super(sDb, SVNWCDbSchema.NODES);
maxOpDepth = -1;
}
@Override
protected String getPathScope() {
return firstPartOfUnion ? null : (String)getBind(2);
}
@Override
protected boolean isStrictiDescendant() {
return true;
}
@Override
protected boolean isFilterPassed() throws SVNException {
if (isColumnNull(SVNWCDbSchema.NODES__Fields.checksum)) {
return false;
}
if (firstPartOfUnion) {
return true;
} else {
return getColumnLong(SVNWCDbSchema.NODES__Fields.op_depth) >= getMaxOpDepth();
}
}
private long getMaxOpDepth() throws SVNException {
if (maxOpDepth == -1) {
SVNWCDbNodesMaxOpDepth maxOpDepth = new SVNWCDbNodesMaxOpDepth(sDb, 0);
try {
this.maxOpDepth = maxOpDepth.getMaxOpDepth((Long) getBind(1), (String) getBind(2));
} finally {
maxOpDepth.reset();
}
}
return maxOpDepth;
}
@Override
protected Object[] getWhere() throws SVNException {
if (firstPartOfUnion) {
return new Object[] {getBind(1), getBind(2)};
} else {
return new Object[] {getBind(1)};
}
}
@Override
public SVNSqlJetStatement getJoinedStatement(String joinedTable) throws SVNException {
return joinedStatement;
}
@Override
public void reset() throws SVNException {
if (joinedStatement != null) {
joinedStatement.reset();
}
super.reset();
}
@Override
public boolean next() throws SVNException {
if (firstPartOfUnion) {
boolean next = super.next();
if (next) {
if (joinedStatement != null) {
joinedStatement.reset();
}
joinedStatement = new JoinedStatement(sDb);
joinedStatement.bindChecksum(1, SvnWcDbStatementUtil.getColumnChecksum(this, SVNWCDbSchema.NODES__Fields.checksum));
joinedStatement.next();
return true;
} else {
firstPartOfUnion = false;
resetCursor();
}
}
if (!firstPartOfUnion) {
boolean next = super.next();
if (next) {
if (joinedStatement != null) {
joinedStatement.reset();
}
joinedStatement = new JoinedStatement(sDb);
joinedStatement.bindChecksum(1, SvnWcDbStatementUtil.getColumnChecksum(this, SVNWCDbSchema.NODES__Fields.checksum));
joinedStatement.next();
}
return next;
}
return false;
}
private void resetCursor() throws SVNException {
try {
getCursor().close();
} catch (SqlJetException e) {
SVNSqlJetDb.createSqlJetError(e);
}
setCursor(openCursor());
}
private static class JoinedStatement extends SVNSqlJetSelectFieldsStatement<SVNWCDbSchema.PRISTINE__Fields> {
public JoinedStatement(SVNSqlJetDb sDb) throws SVNException {
super(sDb, SVNWCDbSchema.PRISTINE);
}
@Override
protected void defineFields() {
fields.add(SVNWCDbSchema.PRISTINE__Fields.md5_checksum);
fields.add(SVNWCDbSchema.PRISTINE__Fields.size);
}
}
}