001: package net.sourceforge.squirrel_sql.plugins.postgres.exp;
002:
003: /*
004: * Copyright (C) 2007 Rob Manning
005: * manningr@users.sourceforge.net
006: *
007: * This library is free software; you can redistribute it and/or
008: * modify it under the terms of the GNU Lesser General Public
009: * License as published by the Free Software Foundation; either
010: * version 2.1 of the License, or (at your option) any later version.
011: *
012: * This library is distributed in the hope that it will be useful,
013: * but WITHOUT ANY WARRANTY; without even the implied warranty of
014: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015: * Lesser General Public License for more details.
016: *
017: * You should have received a copy of the GNU Lesser General Public
018: * License along with this library; if not, write to the Free Software
019: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020: */
021: import java.sql.PreparedStatement;
022: import java.sql.ResultSet;
023: import java.sql.SQLException;
024: import java.util.ArrayList;
025: import java.util.List;
026:
027: import net.sourceforge.squirrel_sql.client.session.ISession;
028: import net.sourceforge.squirrel_sql.client.session.mainpanel.objecttree.INodeExpander;
029: import net.sourceforge.squirrel_sql.client.session.mainpanel.objecttree.ObjectTreeNode;
030: import net.sourceforge.squirrel_sql.fw.sql.DatabaseObjectInfo;
031: import net.sourceforge.squirrel_sql.fw.sql.DatabaseObjectType;
032: import net.sourceforge.squirrel_sql.fw.sql.IDatabaseObjectInfo;
033: import net.sourceforge.squirrel_sql.fw.sql.ISQLConnection;
034: import net.sourceforge.squirrel_sql.fw.sql.SQLDatabaseMetaData;
035:
036: /**
037: * This class handles the expanding of the "Sequence Group"
038: * node. It will give a list of all the Sequences available in the schema.
039: *
040: * @author manningr
041: */
042: public class SequenceParentExpander implements INodeExpander {
043: /** SQL used to load sequence names */
044: private static final String SQL = "SELECT relname "
045: + "FROM pg_class " + "WHERE relkind = 'S' "
046: + "AND relnamespace IN ( " + " SELECT " + " oid "
047: + " FROM pg_namespace " + " WHERE nspname = ? " + ") "
048: + "AND relname like ? ";
049:
050: /**
051: * Default ctor.
052: */
053: public SequenceParentExpander() {
054: super ();
055: }
056:
057: /**
058: * Create the child nodes for the passed parent node and return them. Note
059: * that this method should <B>not</B> actually add the child nodes to the
060: * parent node as this is taken care of in the caller.
061: *
062: * @param session Current session.
063: * @param node Node to be expanded.
064: *
065: * @return A list of <TT>ObjectTreeNode</TT> objects representing the child
066: * nodes for the passed node.
067: */
068: public List<ObjectTreeNode> createChildren(ISession session,
069: ObjectTreeNode parentNode) throws SQLException {
070: final List<ObjectTreeNode> childNodes = new ArrayList<ObjectTreeNode>();
071: final IDatabaseObjectInfo parentDbinfo = parentNode
072: .getDatabaseObjectInfo();
073: final ISQLConnection conn = session.getSQLConnection();
074: final SQLDatabaseMetaData md = session.getSQLConnection()
075: .getSQLMetaData();
076: final String catalogName = parentDbinfo.getCatalogName();
077: final String schemaName = parentDbinfo.getSchemaName();
078: final String objFilter = session.getProperties()
079: .getObjectFilter();
080:
081: final PreparedStatement pstmt = conn.prepareStatement(SQL);
082: ResultSet rs = null;
083: try {
084: pstmt.setString(1, schemaName);
085: pstmt.setString(2, objFilter != null
086: && objFilter.length() > 0 ? objFilter : "%");
087: rs = pstmt.executeQuery();
088: while (rs.next()) {
089: IDatabaseObjectInfo si = new DatabaseObjectInfo(
090: catalogName, schemaName, rs.getString(1),
091: DatabaseObjectType.SEQUENCE, md);
092: childNodes.add(new ObjectTreeNode(session, si));
093: }
094: } finally {
095: if (rs != null) {
096: try {
097: rs.close();
098: } catch (SQLException e) {
099: }
100: }
101: if (pstmt != null) {
102: try {
103: pstmt.close();
104: } catch (SQLException e) {
105: }
106: }
107: }
108: return childNodes;
109: }
110: }
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