From 720940ad1212c35bc439acc5537f3a02f2ae7968 Mon Sep 17 00:00:00 2001
From: Arun Sharma <sharma.arun@gmail.com>
Date: Mon, 22 May 2006 10:10:08 +0000
Subject: [PATCH] Restructured query processor
---
.../exmo/queryprocessor/QueryProcessor.java | 41 ++++++++++
.../QueryTypeMismatchException.java | 43 +++++++++++
.../exmo/queryprocessor/RDFGraph.java | 26 +++++++
.../inrialpes/exmo/queryprocessor/Result.java | 38 ++++++++++
.../inrialpes/exmo/queryprocessor/Triple.java | 31 ++++++++
.../inrialpes/exmo/queryprocessor/Type.java | 26 +++++++
.../impl/QueryProcessorImpl.java | 74 +++++++++++++++++++
.../exmo/queryprocessor/impl/ResultImpl.java | 43 +++++++++++
8 files changed, 322 insertions(+)
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/QueryProcessor.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/QueryTypeMismatchException.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/RDFGraph.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/Result.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/Triple.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/Type.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/impl/QueryProcessorImpl.java
create mode 100644 src/fr/inrialpes/exmo/queryprocessor/impl/ResultImpl.java
diff --git a/src/fr/inrialpes/exmo/queryprocessor/QueryProcessor.java b/src/fr/inrialpes/exmo/queryprocessor/QueryProcessor.java
new file mode 100644
index 00000000..85344069
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/QueryProcessor.java
@@ -0,0 +1,41 @@
+/*
+ * QueryProcessor.java
+ *
+ * Created on March 20, 2006, 10:29 AM
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public interface QueryProcessor {
+ /**
+ * @param query -- The query string
+ * @param type -- The query type, can be one of SELECT, ASK, CONSTRUCT, or DESCRIBE
+ * @returns Result, result form depends on type
+ */
+ public Result query(String query, Type type);
+
+ /**
+ *@param query -- The query string
+ */
+ public Result query(String query);
+
+ /**
+ *@param query -- The query string
+ *@returns query results as string
+ */
+ public String queryWithStringResults(String query);
+
+ /**
+ *@param query -- the query string
+ *@returns the type of the query
+ */
+ public int getType(String query);
+
+ public void loadOntology(String uri);
+
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/QueryTypeMismatchException.java b/src/fr/inrialpes/exmo/queryprocessor/QueryTypeMismatchException.java
new file mode 100644
index 00000000..3e602b51
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/QueryTypeMismatchException.java
@@ -0,0 +1,43 @@
+/*
+ * QueryTypeMismatchException.java
+ *
+ * Created on March 20, 2006, 11:03 AM
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public class QueryTypeMismatchException extends Exception {
+ /**
+ * Create a new <code>QueryTypeMismatchException</code> with no
+ * detail mesage.
+ */
+ public QueryTypeMismatchException() {
+ super();
+ }
+
+ /**
+ * Create a new <code>QueryTypeMismatchException</code> with
+ * the <code>String</code> specified as an error message.
+ *
+ * @param message The error message for the exception.
+ */
+ public QueryTypeMismatchException(String message) {
+ super(message);
+ }
+
+ /**
+ * Create a new <code>QueryTypeMismatchException</code> with
+ * the <code>String</code> specified as an error message and the
+ * <code>Throwable</code> that caused this exception to be raised.
+ * @param message The error message for the exception
+ * @param cause The cause of the exception
+ */
+ public QueryTypeMismatchException(String message, Throwable cause) {
+ super(message, cause);
+ }
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/RDFGraph.java b/src/fr/inrialpes/exmo/queryprocessor/RDFGraph.java
new file mode 100644
index 00000000..3f775eed
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/RDFGraph.java
@@ -0,0 +1,26 @@
+/*
+ * RDFGraph.java
+ *
+ * Created on March 20, 2006, 11:10 AM
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public interface RDFGraph {
+ /**
+ *@returns RDF/XML representation of the graph
+ */
+ public String getXML();
+
+ /**@returns rdf triples
+ */
+ public Triple[] getTriples();
+
+ //TODO: getN3();
+ //TODO: some JenaRepresentation
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/Result.java b/src/fr/inrialpes/exmo/queryprocessor/Result.java
new file mode 100644
index 00000000..c5ad0a8b
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/Result.java
@@ -0,0 +1,38 @@
+/*
+ * Result.java
+ *
+ * Created on March 20, 2006, 10:55 AM
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+import java.util.Collection;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public interface Result {
+ /**@returns the type of the result set
+ */
+ public int getType();
+
+ /**@returns the reslut for ASK type queries
+ */
+ public boolean getAskResult() throws QueryTypeMismatchException;
+
+ /**
+ *@returns the RDF graph for construct queries
+ */
+ public RDFGraph getConstructResult() throws QueryTypeMismatchException;
+
+ /**@returns a collection set for SELECT queries
+ */
+ public Collection getSelectResult() throws QueryTypeMismatchException;
+
+ /**@returns an XML string for the SELECT queries
+ */
+ public String getSelectResultasXML() throws QueryTypeMismatchException;
+
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/Triple.java b/src/fr/inrialpes/exmo/queryprocessor/Triple.java
new file mode 100644
index 00000000..1a34eae3
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/Triple.java
@@ -0,0 +1,31 @@
+/*
+ * Triple.java
+ *
+ * Created on March 20, 2006, 11:12 AM
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public interface Triple {
+
+ public String subject = "";
+ public String object = "";
+ public String predicate = "";
+
+ public String getObject();
+
+ public void setObject(String obj);
+
+ public String getPredicate() ;
+
+ public void setPredicate(String pred);
+
+ public String getSubject();
+
+ public void setSubject(String sub);
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/Type.java b/src/fr/inrialpes/exmo/queryprocessor/Type.java
new file mode 100644
index 00000000..928a4c27
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/Type.java
@@ -0,0 +1,26 @@
+/*
+ * Type.java
+ *
+ * Created on March 20, 2006, 11:20 AM
+ *
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor;
+
+/**
+ *
+ * @author Arun Sharma
+ */
+public class Type {
+
+ public static int SELECT = 1;
+ public static int ASK = 2;
+ public static int CONSTRUCT = 3;
+ public static int DESCRIBE = 4;
+
+ /** Creates a new instance of Type */
+ public Type() {
+ }
+
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/impl/QueryProcessorImpl.java b/src/fr/inrialpes/exmo/queryprocessor/impl/QueryProcessorImpl.java
new file mode 100644
index 00000000..648b883d
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/impl/QueryProcessorImpl.java
@@ -0,0 +1,74 @@
+package fr.inrialpes.exmo.queryprocessor.impl;
+
+/**
+ * @author Arun Sharma
+ */
+
+import java.util.Set;
+import java.util.HashSet;
+
+import com.hp.hpl.jena.query.Query;
+import com.hp.hpl.jena.query.QuerySolution;
+import com.hp.hpl.jena.query.QueryExecutionFactory;
+import com.hp.hpl.jena.query.ResultSet;
+import com.hp.hpl.jena.query.QueryFactory;
+import com.hp.hpl.jena.query.QueryExecution;
+
+import com.hp.hpl.jena.rdf.model.Resource;
+import com.hp.hpl.jena.rdf.model.Model;
+
+import fr.inrialpes.exmo.queryprocessor.Result;
+import fr.inrialpes.exmo.queryprocessor.Type;
+import fr.inrialpes.exmo.queryprocessor.QueryProcessor;
+import fr.inrialpes.exmo.queryprocessor.impl.ResultImpl;
+/**
+ *
+ * @author Arun Sharma
+ */
+public class QueryProcessorImpl implements QueryProcessor {
+
+ Model aModel;
+ ResultSet aResultSet;
+ Set aResults = new HashSet();
+
+ public QueryProcessorImpl() {
+
+ }
+ public QueryProcessorImpl(Model m) {
+ aModel = m;
+ }
+
+ public Result query(String query) {
+ Query myquery = QueryFactory.create(query);
+ QueryExecution qe = QueryExecutionFactory.create(myquery, aModel);
+ System.err.println("Executing query: " + query);
+ aResultSet = qe.execSelect();
+
+ while (aResultSet.hasNext())
+ {
+ QuerySolution aSolution = aResultSet.nextSolution();
+ Resource aRes = (Resource)aSolution.get("uri");
+ aResults.add(aRes);
+ }
+
+ qe.close();
+ ResultImpl res = new ResultImpl(aResults);
+ return res;
+ }
+
+ public Result query(String query, Type type) {
+ return null;
+ }
+
+ public String queryWithStringResults(String query) {
+ return null;
+ }
+
+ public int getType(String query) {
+ return 0;
+ }
+
+ public void loadOntology(String uri) {
+
+ }
+}
diff --git a/src/fr/inrialpes/exmo/queryprocessor/impl/ResultImpl.java b/src/fr/inrialpes/exmo/queryprocessor/impl/ResultImpl.java
new file mode 100644
index 00000000..77551954
--- /dev/null
+++ b/src/fr/inrialpes/exmo/queryprocessor/impl/ResultImpl.java
@@ -0,0 +1,43 @@
+/*
+ * ResultImpl.java
+ *
+ * Created on May 21, 2006, 10:49 PM
+ *
+ *
+ */
+
+package fr.inrialpes.exmo.queryprocessor.impl;
+
+import fr.inrialpes.exmo.queryprocessor.*;
+import java.util.*;
+/**
+ *
+ * @author Arun Sharma
+ */
+public class ResultImpl implements Result{
+
+ Set aSet = new HashSet();
+
+ public ResultImpl(Set set) {
+ aSet = set;
+ }
+
+ /**@returns a collection set for SELECT queries
+ */
+ public Collection getSelectResult() throws QueryTypeMismatchException {
+ return aSet;
+ }
+
+ public int getType() {
+ return 0;
+ }
+ public boolean getAskResult() throws QueryTypeMismatchException {
+ return false;
+ }
+ public RDFGraph getConstructResult() throws QueryTypeMismatchException {
+ return null;
+ }
+ public String getSelectResultasXML() throws QueryTypeMismatchException {
+ return null;
+ }
+}
--
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