/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* 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 as published by
* the Free Software Foundation version 2 of the License.
*
* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.core.db.setup;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Vector;
import mazz.i18n.Msg;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.rhq.core.db.DatabaseType;
import org.rhq.core.db.DatabaseTypeFactory;
import org.rhq.core.db.ant.DbAntI18NFactory;
import org.rhq.core.db.ant.DbAntI18NResourceKeys;
class Index {
private static final Msg MSG = DbAntI18NFactory.getMsg();
private String m_strName;
private Collection<String> m_collFields;
private Table m_table;
private boolean m_isUnique;
private DBSetup m_parent;
private String m_tableSpace;
private String m_condition;
protected Index(Node node, Table table, DatabaseType dbtype) throws SAXException {
m_parent = table.getDBSetup();
// Bail out early if this is the wrong node (should never happen).
if (!Index.isIndex(node)) {
throw new SAXException("node is not an INDEX.");
}
NamedNodeMap map = node.getAttributes();
for (int iAttr = 0; iAttr < map.getLength(); iAttr++) {
Node nodeMap = map.item(iAttr);
String strName = nodeMap.getNodeName();
String strValue = nodeMap.getNodeValue();
if (strName.equalsIgnoreCase("name")) {
// Get the index Name
this.m_strName = strValue;
}
if (strName.equalsIgnoreCase("unique")) {
if (strValue.equalsIgnoreCase("true")) {
this.m_isUnique = true;
} else if (strValue.equalsIgnoreCase("false")) {
this.m_isUnique = false;
} else {
throw new SAXException("value of unique attribute on " + "INDEX element must be 'true' "
+ "or 'false' (was '" + strValue + "')");
}
}
if (strName.equalsIgnoreCase("tablespace")) {
this.m_tableSpace = strValue;
}
if (strName.equalsIgnoreCase("condition")) {
if (DatabaseTypeFactory.isPostgres(dbtype)) {
this.m_condition = strValue;
} else {
System.out.println(MSG
.getMsg(DbAntI18NResourceKeys.INDEX_CONDITION_NOT_SUPPORTED, dbtype.getName()));
}
}
}
///////////////////////////////////////////////////////////////////
// Get the columns references in the index. This is not currently
// verified to ensure they are valid.
this.m_collFields = new ArrayList<String>();
NodeList listFields = node.getChildNodes();
for (int iField = 0; iField < listFields.getLength(); iField++) {
node = listFields.item(iField);
if (Index.isField(node)) {
map = node.getAttributes();
for (int iAttr = 0; iAttr < map.getLength(); iAttr++) {
Node nodeMap = map.item(iAttr);
String strName = nodeMap.getNodeName();
String strValue = nodeMap.getNodeValue();
if (strName.equalsIgnoreCase("name") || strName.equalsIgnoreCase("ref")) {
this.m_collFields.add(strValue);
}
}
}
}
this.m_table = table;
}
protected void create() throws SQLException {
String strCmd = this.getCreateString();
m_parent.doSQL(strCmd);
}
protected String getCreateString() {
String strCmd;
if (this.m_isUnique) {
strCmd = "CREATE UNIQUE INDEX " + this.getName() + " ON " + this.getTable().getName() + " (";
} else {
strCmd = "CREATE INDEX " + this.getName() + " ON " + this.getTable().getName() + " (";
}
Iterator iter = this.getFields().iterator();
boolean bFirst = true;
while (iter.hasNext()) {
if (bFirst) {
bFirst = false;
} else {
strCmd += ", ";
}
String strField = (String) iter.next();
strCmd += strField;
}
strCmd += ')';
// deal with the tablespace
strCmd += getTableSpaceClause();
// now deal with storage attribute which is always inherited
// from the table to ensure consistency
// this may need to be changed later
strCmd += m_table.getStorageClause();
/* If we have a condition, add it */
if (m_condition != null) {
strCmd += " WHERE " + m_condition;
}
return strCmd;
}
protected Collection getFields() {
return this.m_collFields;
}
protected String getName() {
return this.m_strName.toUpperCase();
}
protected Table getTable() {
return this.m_table;
}
protected static Collection<Index> getIndexes(Table table, Node nodeTable, DatabaseType dbtype) {
///////////////////////////////////////////////////////////////
// Get the Columns Names and Related Info
String strTableName = nodeTable.getNodeName();
NodeList listIdx = nodeTable.getChildNodes();
Collection<Index> colResult = new Vector<Index>();
for (int i = 0; i < listIdx.getLength(); i++) {
Node node = listIdx.item(i);
if (Index.isIndex(node)) {
try {
if (DatabaseTypeFactory.isOracle(dbtype)) {
colResult.add(new OracleIndex(node, table, dbtype));
} else {
colResult.add(new Index(node, table, dbtype));
}
} catch (SAXException e) {
}
}
}
return colResult;
}
protected String getTableSpaceClause() {
if ((this.m_tableSpace != null) && !this.m_tableSpace.equals("DEFAULT") && !getTableSpaceSyntax().equals("")) {
return getTableSpaceSyntax() + m_tableSpace;
} else {
return "";
}
}
protected String getTableSpaceSyntax() {
return "";
}
protected static boolean isField(Node node) {
return node.getNodeName().equalsIgnoreCase("field");
}
protected static boolean isIndex(Node node) {
return node.getNodeName().equalsIgnoreCase("index");
}
}