Author: jens
Date: Mon Feb 11 09:55:55 2013
New Revision: 1444699
URL: http://svn.apache.org/r1444699
Log:
Query Parser example: add some inline comments
Modified:
chemistry/opencmis/trunk/chemistry-opencmis-samples/chemistry-opencmis-queryparser/src/main/java/org/apache/chemistry/opencmis/query/example/ExampleQueryProcessor.java
Modified:
chemistry/opencmis/trunk/chemistry-opencmis-samples/chemistry-opencmis-queryparser/src/main/java/org/apache/chemistry/opencmis/query/example/ExampleQueryProcessor.java
URL:
http://svn.apache.org/viewvc/chemistry/opencmis/trunk/chemistry-opencmis-samples/chemistry-opencmis-queryparser/src/main/java/org/apache/chemistry/opencmis/query/example/ExampleQueryProcessor.java?rev=1444699&r1=1444698&r2=1444699&view=diff
==============================================================================
---
chemistry/opencmis/trunk/chemistry-opencmis-samples/chemistry-opencmis-queryparser/src/main/java/org/apache/chemistry/opencmis/query/example/ExampleQueryProcessor.java
(original)
+++
chemistry/opencmis/trunk/chemistry-opencmis-samples/chemistry-opencmis-queryparser/src/main/java/org/apache/chemistry/opencmis/query/example/ExampleQueryProcessor.java
Mon Feb 11 09:55:55 2013
@@ -49,23 +49,35 @@ public class ExampleQueryProcessor {
public String parseQuery(String queryString) {
StringBuffer generatedResponse = new StringBuffer();
+
+ // Instantiate a walker traversing the WHERE clause and generating the
output string
ExampleQueryWalker walker = new ExampleQueryWalker();
// create type definitions, for this example we just create
cmis:document
TypeManager typeManager = ExampleTypeManager.getInstance();
+ // create the parser helper class with type manager and walker
QueryUtilStrict queryUtil= new QueryUtilStrict(queryString,
typeManager, walker);
try {
+ // parse the statement, then traverse it using out query walker
queryUtil.processStatement();
QueryObject qo = queryUtil.getQueryObject();
+
+ // The SELECT and FROM part is handled in the QueryObject, we just
need to retrieve
+ // the results, and generte the SELECT string
String selFromPart = getSelectFromString(qo);
generatedResponse.append(selFromPart);
+ // get the generated string from our query walker and append it
String whereClause = walker.getResult();
generatedResponse.append(whereClause);
+
+ // The ORDER BY part is handled in the QueryObject, we just need
to retrieve
+ // the results, and generte the ORDER BY string
generatedResponse.append(getOrderBy(qo));
+ // Finally we have the full statement and return is as result
return generatedResponse.toString();
} catch (RecognitionException e) {
