1 files changed, 127 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/AbstractDao.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/AbstractDao.java
new file mode 100644
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+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/AbstractDao.java
@@ -0,0 +1,127 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Subsonic is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2009 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.dao;
+
+import java.util.Date;
+import java.util.List;
+
+import org.springframework.jdbc.core.*;
+
+import net.sourceforge.subsonic.Logger;
+
+/**
+ * Abstract superclass for all DAO's.
+ *
+ * @author Sindre Mehus
+ */
+public class AbstractDao {
+    private static final Logger LOG = Logger.getLogger(AbstractDao.class);
+    
+    private DaoHelper daoHelper;
+
+    /**
+     * Returns a JDBC template for performing database operations.
+     * @return A JDBC template.
+     */
+    public JdbcTemplate getJdbcTemplate() {
+        return daoHelper.getJdbcTemplate();
+    }
+
+    protected String questionMarks(String columns) {
+        int count = columns.split(", ").length;
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < count; i++) {
+            builder.append('?');
+            if (i < count - 1) {
+                builder.append(", ");
+            }
+        }
+        return builder.toString();
+    }
+
+    protected String prefix(String columns, String prefix) {
+        StringBuilder builder = new StringBuilder();
+        for (String s : columns.split(", ")) {
+            builder.append(prefix).append(".").append(s).append(",");
+        }
+        if (builder.length() > 0) {
+            builder.setLength(builder.length() - 1);
+        }
+        return builder.toString();
+    }
+
+    protected int update(String sql, Object... args) {
+        long t = System.nanoTime();
+        int result = getJdbcTemplate().update(sql, args);
+        log(sql, t);
+        return result;
+    }
+
+    private void log(String sql, long startTimeNano) {
+//        long micros = (System.nanoTime() - startTimeNano) / 1000L;
+//        LOG.debug(micros + "  " + sql);
+    }
+
+    protected <T> List<T> query(String sql, RowMapper rowMapper, Object... args) {
+        long t = System.nanoTime();
+        List<T> result = getJdbcTemplate().query(sql, args, rowMapper);
+        log(sql, t);
+        return result;
+    }
+
+    protected List<String> queryForStrings(String sql, Object... args) {
+        long t = System.nanoTime();
+        List<String> result = getJdbcTemplate().queryForList(sql, args, String.class);
+        log(sql, t);
+        return result;
+    }
+
+    protected Integer queryForInt(String sql, Integer defaultValue, Object... args) {
+        long t = System.nanoTime();
+        List<Integer> list = getJdbcTemplate().queryForList(sql, args, Integer.class);
+        Integer result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
+        log(sql, t);
+        return result;
+    }
+
+    protected Date queryForDate(String sql, Date defaultValue, Object... args) {
+        long t = System.nanoTime();
+        List<Date> list = getJdbcTemplate().queryForList(sql, args, Date.class);
+        Date result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
+        log(sql, t);
+        return result;
+    }
+
+    protected Long queryForLong(String sql, Long defaultValue, Object... args) {
+        long t = System.nanoTime();
+        List<Long> list = getJdbcTemplate().queryForList(sql, args, Long.class);
+        Long result = list.isEmpty() ? defaultValue : list.get(0) == null ? defaultValue : list.get(0);
+        log(sql, t);
+        return result;
+    }
+
+    protected <T> T queryOne(String sql, RowMapper rowMapper, Object... args) {
+        List<T> list = query(sql, rowMapper, args);
+        return list.isEmpty() ? null : list.get(0);
+    }
+
+    public void setDaoHelper(DaoHelper daoHelper) {
+        this.daoHelper = daoHelper;
+    }
+}