Added QueryBuilder class for query builder functionality and implemen…

…ted some basic queries methods

.classpath

@@ -10,5 +10,6 @@
 	<classpathentry kind="lib" path="lib/mysql-connector-java-8.0.20.jar"/>
 	<classpathentry kind="lib" path="lib/sqlite-jdbc-3.30.1.jar"/>
 	<classpathentry kind="lib" path="lib/postgresql-42.2.14.jar"/>
+	<classpathentry kind="lib" path="lib/sqlbuilder-3.0.0.jar"/>
 	<classpathentry kind="output" path="resources/code"/>
 </classpath>

src/samuelal/squelized/QueryBuilder.java

@@ -0,0 +1,90 @@
+package samuelal.squelized;
+
+import java.sql.Types;
+
+import com.healthmarketscience.sqlbuilder.CreateTableQuery;
+import com.healthmarketscience.sqlbuilder.CustomSql;
+import com.healthmarketscience.sqlbuilder.InsertQuery;
+import com.healthmarketscience.sqlbuilder.OrderObject.Dir;
+import com.healthmarketscience.sqlbuilder.SelectQuery;
+import com.healthmarketscience.sqlbuilder.dbspec.basic.DbSchema;
+import com.healthmarketscience.sqlbuilder.dbspec.basic.DbSpec;
+import com.healthmarketscience.sqlbuilder.dbspec.basic.DbTable;
+
+/* Helper class to support CRUD database operations
+ * using SqlQueryBuilder library
+ */
+public class QueryBuilder {
+
+	static DbSchema dbSchema;
+	static DbSpec dbSpecs;
+
+
+	private static void loadSQLBuilderSchema() {
+		dbSpecs = new DbSpec();
+		dbSchema = dbSpecs.addDefaultSchema();
+	}
+
+	public static String createTable(String tableName, String[] columnNames, int[] columnTypes, Integer[] columnLength) {
+
+		// Specify table name
+		DbTable newTable = dbSchema.addTable(tableName);
+
+		// Add columns
+		for (int i = 0; i < columnNames.length; i++) {
+			newTable.addColumn(columnNames[i], columnTypes[i], columnLength[i]);
+		}
+
+		String query = new CreateTableQuery(newTable, true).validate().toString();
+		return query;
+	}
+
+	public static String insertData(String tableName, String[] columns, Object[] data) {
+
+		InsertQuery insertQuery = new InsertQuery(tableName).addCustomColumns(columns, data);
+
+		String query = insertQuery.validate().toString();
+
+		return query;
+
+	}
+
+	public static String displayAllTableRecords(String tableName) {
+
+		SelectQuery selectQuery = new SelectQuery().addCustomFromTable(tableName).addAllColumns();
+
+		String query = selectQuery.validate().toString();
+
+		return query;
+	}
+
+	public static String displayRecords(String tableName, String[] columns) {
+
+		SelectQuery selectQuery = new SelectQuery().addCustomFromTable(tableName);
+
+		for (String column : columns) {
+			selectQuery.addCustomColumns(column);
+		}
+
+		String query = selectQuery.validate().toString();
+
+		return query;	
+	}
+
+	public static String displayRecords(String tableName, String[] columns, String orderColumn, boolean ascending) {
+
+		SelectQuery selectQuery = new SelectQuery().addCustomFromTable(tableName);
+
+		for (String column : columns) {
+			selectQuery.addCustomColumns(column);
+		}
+
+		selectQuery.addCustomOrdering(orderColumn, ascending ? Dir.ASCENDING : Dir.DESCENDING);
+
+		String query = selectQuery.validate().toString();
+
+		return query;
+	}
+
+
+}

src/samuelal/squelized/SQLConnection.java

@@ -3,7 +3,6 @@
 import processing.core.*;
 import processing.data.Table;
 import processing.data.TableRow;
-
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
@@ -145,7 +144,21 @@ public Table runQuery(String query)
 		} 
 		return queryResult;
 	}
-
+
+
+	public Table getTable(String tableName) {
+		return runQuery(QueryBuilder.displayAllTableRecords(tableName));
+	}
+
+	public Table getColumn(String tableName, String columnName) {
+		return getColumns(tableName, new String[] {columnName});
+	}
+
+
+	public Table getColumns(String tableName, String[] columnNames) {
+		return runQuery(QueryBuilder.displayRecords(tableName, columnNames));
+	}
+
 
 	/**
 	 * return the version of the Library.