Revision 24
Added by Matt Jones about 24 years ago
| DBReader.java | ||
|---|---|---|
| 81 | 81 |
public String readDocument(long nodeid) {
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| 82 | 82 |
StringBuffer doc = new StringBuffer(); |
| 83 | 83 |
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System.out.println("\nGetting document with nodeid: " + nodeid + "\n");
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//BasicElement element = readNodeFromDB(nodeid); |
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| 86 | 84 |
ReaderElement element = new ReaderElement(conn, nodeid); |
| 87 |
doc.append(element); |
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doc.append("<?xml version=\"1.0\"?>\n");
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doc.append(element.toString()); |
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| 88 | 87 |
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| 89 | 88 |
return (doc.toString()); |
| 90 | 89 |
} |
| 91 |
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/** look up the assigned element id from DB connection */ |
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private BasicElement readNodeFromDB(long nodeid) {
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long element_id=0; |
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long nodeparentid=0; |
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String nodetype=null; |
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String nodename=null; |
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String nodedata=null; |
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PreparedStatement pstmt; |
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try {
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pstmt = |
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conn.prepareStatement("SELECT nodeid,nodeparentid,nodetype, " +
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"nodename,nodedata FROM xml_nodes WHERE nodeid = ?"); |
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// Bind the values to the query |
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pstmt.setLong(1, nodeid); |
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pstmt.execute(); |
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try {
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ResultSet rs = pstmt.getResultSet(); |
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try {
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boolean tableHasRows = rs.next(); |
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if (tableHasRows) {
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try {
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element_id = rs.getLong(1); |
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nodeparentid = rs.getLong(2); |
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nodetype = rs.getString(3); |
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nodename = rs.getString(4); |
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nodedata = rs.getString(5); |
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} catch (SQLException e) {
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System.out.println("Error with getInt: " + e.getMessage());
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} |
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} |
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} catch (SQLException e) {
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System.out.println("Error with next: " + e.getMessage());
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} |
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} catch (SQLException e) {
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System.out.println("Error with getrset: " + e.getMessage());
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} |
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pstmt.close(); |
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} catch (SQLException e) {
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System.out.println("Error getting id: " + e.getMessage());
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} |
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BasicElement element = null; |
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if (nodetype.equals("ELEMENT")) {
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element = new BasicElement(element_id,nodename,nodeparentid); |
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element.appendContent(nodedata); |
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} |
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// Get a list of child nodes and recursively retrieve them as well |
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try {
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pstmt = |
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conn.prepareStatement("SELECT nodeid,nodeparentid,nodetype, " +
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"nodename,nodedata FROM xml_nodes " + |
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"WHERE nodeparentid = ?"); |
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// Bind the values to the query |
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pstmt.setLong(1, nodeid); |
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pstmt.execute(); |
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try {
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ResultSet rs = pstmt.getResultSet(); |
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try {
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boolean tableHasRows = rs.next(); |
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if (tableHasRows) {
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try {
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element_id = rs.getLong(1); |
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nodeparentid = rs.getLong(2); |
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nodetype = rs.getString(3); |
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nodename = rs.getString(4); |
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nodedata = rs.getString(5); |
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} catch (SQLException e) {
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System.out.println("Error with getInt: " + e.getMessage());
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} |
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} |
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} catch (SQLException e) {
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System.out.println("Error with next: " + e.getMessage());
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} |
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} catch (SQLException e) {
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System.out.println("Error with getrset: " + e.getMessage());
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} |
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pstmt.close(); |
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} catch (SQLException e) {
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System.out.println("Error getting id: " + e.getMessage());
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} |
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return element; |
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} |
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| 180 | 90 |
} |
Also available in: Unified diff
completed basic DBReader functionality. Can now read XML from DB using DBReader