Revision 170
Added by Matt Jones almost 24 years ago
| src/edu/ucsb/nceas/metacat/QuerySpecification.java | ||
|---|---|---|
| 28 | 28 |
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| 29 | 29 |
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/** |
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* A Class that represents a structuredd query,and can be constructed from an
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* XML serialization |
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* A Class that represents a structured query,and can be constructed from an |
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* XML serialization conforming to "pathquery.dtd"
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*/ |
| 34 | 34 |
public class QuerySpecification extends HandlerBase {
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| 35 | 35 |
|
| ... | ... | |
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try {
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FileReader xml = new FileReader(new File(xmlfile)); |
| 95 | 95 |
QuerySpecification qspec = new QuerySpecification(xml); |
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System.out.println(qspec); |
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System.out.println(qspec.toSQL());
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} catch (IOException e) {
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System.err.println(e.getMessage()); |
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} |
| ... | ... | |
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} |
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} |
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public String toSQL() {
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StringBuffer self = new StringBuffer(); |
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self.append("SELECT DISTINCT docid FROM xml_nodes WHERE \n");
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self.append(query.toSQL()); |
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return self.toString(); |
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} |
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public String toString() {
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return "meta_file_id=" + meta_file_id + "\n" + |
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"querytitle=" + querytitle + "\n" + query; |
| ... | ... | |
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return children.elements(); |
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} |
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public String toSQL() {
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StringBuffer self = new StringBuffer(); |
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boolean first = true; |
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self.append("(");
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Enumeration en= getChildren(); |
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while (en.hasMoreElements()) {
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Object qobject = en.nextElement(); |
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if (first) {
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first = false; |
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} else {
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self.append(" " + booleantype + " ");
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} |
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if (qobject instanceof QueryGroup) {
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QueryGroup qg = (QueryGroup)qobject; |
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self.append(qg.toSQL()); |
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} else if (qobject instanceof QueryTerm) {
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QueryTerm qt = (QueryTerm)qobject; |
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self.append(qt.toSQL()); |
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} else {
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System.err.println("qobject wrong type: fatal error");
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} |
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} |
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self.append(") \n");
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return self.toString(); |
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} |
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public String toString() {
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StringBuffer self = new StringBuffer(); |
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|
| ... | ... | |
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return pathexpr; |
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} |
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public String toSQL() {
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StringBuffer self = new StringBuffer(); |
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//self.append(" Query Term iscasesensitive=" + casesensitive + "\n");
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// Uppercase the search string if case match is not important |
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String casevalue = null; |
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String nodedataterm = null; |
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if (casesensitive) {
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nodedataterm = "nodedata"; |
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casevalue = value; |
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} else {
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nodedataterm = "UPPER(nodedata)"; |
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casevalue = value.toUpperCase(); |
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} |
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// Add appropriate wildcards to search string |
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String searchvalue = null; |
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if (searchmode.equals("starts-with")) {
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searchvalue = casevalue + "%"; |
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} else if (searchmode.equals("ends-with")) {
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searchvalue = "%" + casevalue; |
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} else if (searchmode.equals("contains")) {
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searchvalue = "%" + casevalue + "%"; |
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} else {
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searchvalue = casevalue; |
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} |
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self.append("(");
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if (pathexpr != null) {
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self.append(nodedataterm + " LIKE " + "'" + searchvalue + "' "); |
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self.append("AND parentnodeid IN ");
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self.append("(SELECT nodeid FROM xml_index WHERE path LIKE " +
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"'" + pathexpr + "') " ); |
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} else {
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self.append(nodedataterm + " LIKE " + "'" + searchvalue + "' "); |
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} |
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self.append(") \n");
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return self.toString(); |
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} |
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public String toString() {
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StringBuffer self = new StringBuffer(); |
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|
| src/edu/ucsb/nceas/metacat/DBQuery.java | ||
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| 34 | 34 |
/** |
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* the main routine used to test the DBQuery utility. |
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* |
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* Usage: java DBQuery <query> <user> <password> [dbstring]
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* Usage: java DBQuery <xmlfile> <user> <password> [dbstring]
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* |
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* @param query the text to search for in the element and attribute content
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* @param xmlfile the filename of the xml file containing the query
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* @param user the username to use for the database connection |
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* @param password the password to use for the database connection |
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* @param dbstring the connection info to use for the database connection |
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*/ |
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static public void main(String[] args) {
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if (args.length < 4)
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if (args.length < 3)
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{
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System.err.println("Wrong number of arguments!!!");
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System.err.println("USAGE: java DBQuery " +
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"<query> <doctype> <user> <password> [dbstring]");
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"<xmlfile> <user> <password> [dbstring]");
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return; |
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} else {
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try {
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String query = args[0]; |
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String doctype = args[1]; |
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String user = args[2]; |
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String password = args[3]; |
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String xmlfile = args[0]; |
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String user = args[1]; |
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String password = args[2]; |
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String dbstring = null; |
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if (args.length <= 4) {
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if (args.length <= 3) {
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dbstring = defaultDB; |
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} else {
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dbstring = args[4];
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dbstring = args[3];
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} |
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// Open a connection to the database |
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Connection dbconn = MetaCatUtil.openDBConnection( |
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"oracle.jdbc.driver.OracleDriver", |
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dbstring, user, password); |
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// Execute the simple query
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// Execute the query |
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DBQuery rd = new DBQuery(dbconn); |
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FileReader xml = new FileReader(new File(xmlfile)); |
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//QuerySpecification qspec = new QuerySpecification(xml); |
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//System.out.println(qspec.toSQL()); |
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Hashtable nodelist = null; |
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nodelist = rd.findDocuments(query);
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nodelist = rd.findDocuments(xml);
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// Print the reulting root nodes |
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StringBuffer result = new StringBuffer(); |
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String document = null; |
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Long docid = null;
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String docid = null;
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result.append("<?xml version=\"1.0\"?>\n");
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result.append("<resultset>\n");
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result.append(" <query>" + query + "</query>\n");
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result.append(" <query>" + xmlfile + "</query>\n");
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Enumeration doclist = nodelist.keys(); |
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while (doclist.hasMoreElements()) {
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docid = (Long)doclist.nextElement();
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docid = (String)doclist.nextElement();
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document = (String)nodelist.get(docid); |
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result.append(" <document>\n " + document +
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"\n </document>\n"); |
| ... | ... | |
| 118 | 122 |
/** |
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* routine to search the elements and attributes looking to match query |
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* |
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* @param queryspec the xml serialization of the query |
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* @param requestedDoctype the type of documents to return from the query |
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* @param queryspec the xml serialization of the query (pathquery.dtd) |
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*/ |
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public Hashtable findDocuments(String queryspec) {
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public Hashtable findDocuments(Reader queryspec) {
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Hashtable docListResult = new Hashtable(); |
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//QuerySpecification qspec = new QuerySpecification(queryspec); |
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/* |
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PreparedStatement pstmt; |
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// Now look up the document id |
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long docid = 0;
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String docid = null;
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String docname = null; |
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String doctype = null; |
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String doctitle = null; |
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StringBuffer document = null; |
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|
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try {
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if (requestedDoctype == null || |
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requestedDoctype.equals("any") ||
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requestedDoctype.equals("ANY")) {
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pstmt = conn.prepareStatement( |
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"SELECT docid,docname,doctype,doctitle " + |
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"FROM xml_documents " + |
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"WHERE docid IN " + |
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"(SELECT docid " + |
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"FROM xml_nodes WHERE nodedata LIKE ? )"); |
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QuerySpecification qspec = new QuerySpecification(queryspec); |
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pstmt = conn.prepareStatement( |
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"SELECT docid,docname,doctype,doctitle " + |
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"FROM xml_documents WHERE docid IN (" +
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qspec.toSQL() + ")"); |
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// Bind the values to the query |
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pstmt.setString(1, query); |
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} else {
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pstmt = conn.prepareStatement( |
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"SELECT docid,docname,doctype,doctitle " + |
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"FROM xml_documents " + |
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"WHERE docid IN " + |
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"(SELECT docid " + |
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"FROM xml_nodes WHERE nodedata LIKE ? ) " + |
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"AND doctype = ?"); |
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|
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// Bind the values to the query |
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pstmt.setString(1, query); |
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pstmt.setString(2, requestedDoctype); |
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} |
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|
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pstmt.execute(); |
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ResultSet rs = pstmt.getResultSet(); |
| 170 | 149 |
boolean tableHasRows = rs.next(); |
| 171 | 150 |
while (tableHasRows) {
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docid = rs.getLong(1);
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docid = rs.getString(1);
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| 173 | 152 |
docname = rs.getString(2); |
| 174 | 153 |
doctype = rs.getString(3); |
| 175 | 154 |
doctitle = rs.getString(4); |
| ... | ... | |
| 187 | 166 |
} |
| 188 | 167 |
|
| 189 | 168 |
// Store the document id and the root node id |
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docListResult.put(new Long(docid),(String)document.toString());
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docListResult.put(docid,(String)document.toString());
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| 191 | 170 |
|
| 192 | 171 |
// Advance to the next record in the cursor |
| 193 | 172 |
tableHasRows = rs.next(); |
| ... | ... | |
| 195 | 174 |
pstmt.close(); |
| 196 | 175 |
} catch (SQLException e) {
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| 197 | 176 |
System.out.println("Error getting id: " + e.getMessage());
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} catch (IOException ioe) {
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System.err.println("Error printing qspec:");
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System.err.println(ioe.getMessage()); |
|
| 198 | 180 |
} |
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*/ |
|
| 200 | 181 |
return docListResult; |
| 201 | 182 |
} |
| 202 | 183 |
} |
Also available in: Unified diff
continued work on structured query. Now QuerySpecification generates SQL for a given xml input, and DBQuery uses that SQL to send the query to the db