X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2Forg%2Fmxchange%2Fjcore%2Fdatabase%2Fbackend%2FDatabaseBackend.java;h=0dd7dac728e13fe1a1d46b9fc482683ccaa94214;hb=4ba810ed69c77d323d5a456124b23b04a241a854;hp=3a8154257964dc8c7408a9e11daa4989a3b36a92;hpb=cf5d98f8e1028421d45d23c8ec007475e45ca307;p=jcore.git

diff --git a/src/org/mxchange/jcore/database/backend/DatabaseBackend.java b/src/org/mxchange/jcore/database/backend/DatabaseBackend.java
index 3a81542..0dd7dac 100644
--- a/src/org/mxchange/jcore/database/backend/DatabaseBackend.java
+++ b/src/org/mxchange/jcore/database/backend/DatabaseBackend.java
@@ -18,8 +18,9 @@ package org.mxchange.jcore.database.backend;
 
 import java.io.IOException;
 import java.sql.SQLException;
-import java.util.Iterator;
 import org.mxchange.jcore.FrameworkInterface;
+import org.mxchange.jcore.criteria.searchable.SearchableCritera;
+import org.mxchange.jcore.database.result.Result;
 import org.mxchange.jcore.database.storage.Storeable;
 import org.mxchange.jcore.exceptions.BadTokenException;
 
@@ -38,71 +39,22 @@ public interface DatabaseBackend extends FrameworkInterface {
 	public void connectToDatabase () throws SQLException;
 
 	/**
-	 * Shuts down this backend
-	 */
-	public void doShutdown ();
-
-	/**
-	 * Some "getter" for row index from given boolean row value
-	 *
-	 * @param columnName Name of column
-	 * @param bool Boolean value to look for
-	 * @return Row index
-	 */
-	public int getRowIndexFromColumn (final String columnName, final boolean bool);
-
-	/**
-	 * Some "getter" for total table row count
-	 * 
-	 * @return Total row count
-	 * @throws java.sql.SQLException If an SQL error occurs
-	 */
-	public int getTotalCount () throws SQLException;
-
-	/**
-	 * Checks whether at least one row is found with given boolean value.
-	 *
-	 * @param columnName Column to check for boolean value
-	 * @param bool Boolean value to check
-	 * @return Whether boolean value is found and returns at least one row
-	 * @throws java.sql.SQLException If an SQL error occurs
-	 */
-	public boolean isRowFound (final String columnName, final boolean bool) throws SQLException;
-
-	/**
-	 * Rewinds backend
-	 */
-	public void rewind ();
-
-	/**
-	 * Get length of underlaying file
-	 *
-	 * @return Length of underlaying file
-	 */
-	public long length ();
-
-	/**
-	 * Stores an object in the database.
+	 * Run a "SELECT" statement with given criteria and always return a Result
+	 * instance. The result instance then provides methods to iterate over all
+	 * found entries.
 	 *
-	 * @param object Object to store in database
-	 * @throws java.io.IOException From inner class
+	 * @param critera Search critera
+	 * @return A result instance
+	 * @throws java.io.IOException If any IO error occurs
+	 * @throws org.mxchange.jcore.exceptions.BadTokenException If a bad token was found
 	 */
-	public void store (final Storeable object) throws IOException;
+	public Result<? extends Storeable> doSelectByCriteria (final SearchableCritera critera) throws IOException, BadTokenException;
 
 	/**
-	 * Gets an iterator for contacts
+	 * Shuts down this backend
 	 *
-	 * @return Iterator for contacts
-	 * @throws org.mxchange.jcore.exceptions.BadTokenException If the CSV token is badly formulated
-	 */
-	public Iterator<? extends Storeable> iterator () throws BadTokenException;
-
-	/**
-	 * Reads a single row from database.
-	 * 
-	 * @param rowIndex Row index (or how much to skip)
-	 * @return A Storeable instance
-	 * @throws org.mxchange.jcore.exceptions.BadTokenException If a token was badly formatted
+	 * @throws java.sql.SQLException If any SQL error occurs
+	 * @throws java.io.IOException If any IO error occurs
 	 */
-	public Storeable readRow (final int rowIndex) throws BadTokenException;
+	public void doShutdown () throws SQLException, IOException;
 }