Add methods formatDate(), formatDateTime(), parseDate() and parseDateTime() to DateUtils

2 files changed, 110 insertions, 3 deletions

diff --git a/sonar-plugin-api/src/main/java/org/sonar/api/utils/DateUtils.java b/sonar-plugin-api/src/main/java/org/sonar/api/utils/DateUtils.java
index 510cb0c0161..a77865c2dbf 100644
--- a/sonar-plugin-api/src/main/java/org/sonar/api/utils/DateUtils.java
+++ b/sonar-plugin-api/src/main/java/org/sonar/api/utils/DateUtils.java
@@ -19,10 +19,51 @@
  */
 package org.sonar.api.utils;
 
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
 /**
  * @since 2.7
  */
-public interface DateUtils {
-  String DATE_FORMAT = "yyyy-MM-dd";
-  String DATETIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ssZ";
+public final class DateUtils {
+  public static final String DATE_FORMAT = "yyyy-MM-dd";
+  public static final String DATETIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ssZ";
+
+  /**
+   * This method is not optimized. The DateFormat instance is created each time. Please use it sporadically.
+   */
+  public static String formatDate(Date d) {
+    return new SimpleDateFormat(DATE_FORMAT).format(d);
+  }
+
+  /**
+   * This method is not optimized. The DateFormat instance is created each time. Please use it sporadically.
+   */
+  public static String formatDateTime(Date d) {
+    return new SimpleDateFormat(DATETIME_FORMAT).format(d);
+  }
+
+  /**
+   * This method is not optimized. The DateFormat instance is created each time. Please use it sporadically.
+   */
+  public static Date parseDate(String s) {
+    return parse(s, DATE_FORMAT);
+  }
+
+  /**
+   * This method is not optimized. The DateFormat instance is created each time. Please use it sporadically.
+   */
+  public static Date parseDateTime(String s) {
+    return parse(s, DATETIME_FORMAT);
+  }
+
+  private static Date parse(String s, String format) {
+    try {
+      return new SimpleDateFormat(format).parse(s);
+
+    } catch (ParseException e) {
+      throw new SonarException("The date '" + s + "' does not respect format '" + format + "'");
+    }
+  }
 }
diff --git a/sonar-plugin-api/src/test/java/org/sonar/api/utils/DateUtilsTest.java b/sonar-plugin-api/src/test/java/org/sonar/api/utils/DateUtilsTest.java
new file mode 100644
index 00000000000..8ecebab8dca
--- /dev/null
+++ b/sonar-plugin-api/src/test/java/org/sonar/api/utils/DateUtilsTest.java
@@ -0,0 +1,66 @@
+/*
+ * Sonar, open source software quality management tool.
+ * Copyright (C) 2008-2011 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * Sonar is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * Sonar 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Sonar; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
+ */
+package org.sonar.api.utils;
+
+import org.junit.Test;
+
+import java.util.Date;
+
+import static org.hamcrest.core.Is.is;
+import static org.hamcrest.number.OrderingComparisons.greaterThan;
+import static org.hamcrest.text.StringStartsWith.startsWith;
+import static org.junit.Assert.assertThat;
+
+public class DateUtilsTest {
+
+  @Test
+  public void shouldParseDate() {
+    Date date = DateUtils.parseDate("2010-05-18");
+    assertThat(date.getDate(), is(18));
+  }
+
+  @Test(expected = SonarException.class)
+  public void shouldNotParseDate() {
+    DateUtils.parseDate("2010/05/18");
+  }
+
+  @Test
+  public void shouldParseDateTime() {
+    Date date = DateUtils.parseDateTime("2010-05-18T15:50:45+0100");
+    assertThat(date.getMinutes(), is(50));
+  }
+
+  @Test(expected = SonarException.class)
+  public void shouldNotParseDateTime() {
+    DateUtils.parseDate("2010/05/18 10:55");
+  }
+
+  @Test
+  public void shouldFormatDate() {
+    assertThat(DateUtils.formatDate(new Date()), startsWith("20"));
+    assertThat(DateUtils.formatDate(new Date()).length(), is(10));
+  }
+
+  @Test
+  public void shouldFormatDateTime() {
+    assertThat(DateUtils.formatDateTime(new Date()), startsWith("20"));
+    assertThat(DateUtils.formatDateTime(new Date()).length(), greaterThan(20));
+  }
+}