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/*
* ConcurrencyCheckDirty.java
*
* Created on March 19, 2002
*
*/
package com.sun.jdo.spi.persistence.support.sqlstore.sql.concurrency;
import org.netbeans.modules.dbschema.ColumnElement;
import com.sun.jdo.spi.persistence.support.sqlstore.SQLStateManager;
import com.sun.jdo.spi.persistence.support.sqlstore.UpdateObjectDesc;
import com.sun.jdo.spi.persistence.support.sqlstore.model.FieldDesc;
import com.sun.jdo.spi.persistence.support.sqlstore.model.LocalFieldDesc;
import com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.QueryTable;
import com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.Statement;
import com.sun.jdo.spi.persistence.support.sqlstore.sql.generator.UpdateQueryPlan;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Iterator;
/**
*/
public class ConcurrencyCheckDirty extends ConcurrencyDBNative {
public void commit(UpdateObjectDesc updateDesc,
SQLStateManager beforeImage,
SQLStateManager afterImage,
int logReason) {
this.beforeImage = beforeImage;
this.afterImage = afterImage;
}
public void update(UpdateQueryPlan plan) {
boolean debug = logger.isLoggable();
if (debug) {
logger.fine("sqlstore.sql.concurrency.concurrencychkdirty", beforeImage); // NOI18N
}
if (beforeImage != null) {
ArrayList fields = plan.getConfig().fields;
BitSet verifyGroupMask = prepareVerifyGroupMask(plan);
for (int i = 0; i < 2; i++) {
if (i == 0) {
fields = plan.getConfig().fields;
} else if (i == 1) {
fields = plan.getConfig().hiddenFields;
}
if (fields == null) {
continue;
}
for (int j = 0; j < fields.size(); j++) {
FieldDesc f = (FieldDesc) fields.get(j);
if (f instanceof LocalFieldDesc) {
LocalFieldDesc lf = (LocalFieldDesc) f;
// Make sure the field is marked for concurrency check and is present
// Also, skip all fields that are marked as secondary tracked fields.
//
// RESOLVE: we need to fetch the fields that are not present.
if (((lf.sqlProperties & FieldDesc.PROP_IN_CONCURRENCY_CHECK) > 0) &&
((lf.sqlProperties & FieldDesc.PROP_SECONDARY_TRACKED_FIELD) == 0) &&
beforeImage.getPresenceMaskBit(lf.absoluteID)) {
if (isFieldVerificationRequired(lf, verifyGroupMask)) {
Object val = null;
val = lf.getValue(this.beforeImage);
addConstraint(plan, lf, val);
}
}
}
}
}
}
if (debug) {
logger.fine("sqlstore.sql.concurrency.concurrencychkdirty.exit"); // NOI18N
}
}
protected BitSet prepareVerifyGroupMask(UpdateQueryPlan plan) {
return null;
}
protected boolean isFieldVerificationRequired(LocalFieldDesc lf,
BitSet verifyGroupMask) {
return true;
}
/**
* Adds a comparison for local field <CODE>lf</CODE> and value <CODE>val</CODE>
* to the corresponding statements in UpdateQueryPlan <CODE>plan</CODE>.
*/
private static void addConstraint(UpdateQueryPlan plan, LocalFieldDesc lf, Object val) {
for (Iterator iter = lf.getColumnElements(); iter.hasNext(); ) {
ColumnElement c = (ColumnElement) iter.next();
for (int i = 0; i < plan.statements.size(); i++) {
Statement s = (Statement) plan.statements.get(i);
for (int j = 0; j < s.tableList.size(); j++) {
QueryTable t = (QueryTable) s.tableList.get(j);
if (t.getTableDesc().getTableElement() == c.getDeclaringTable()) {
s.addConstraint(lf, val);
}
}
}
}
}
public Object clone() {
return new ConcurrencyCheckDirty();
}
}