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Patch from René Scheibe from bug #57512 - Fix potential NPE in DateUtil for invalid dates

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1682796 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2015-05-31 21:18:11 +00:00
parent 44821b1f39
commit 7915b3ce38
2 changed files with 99 additions and 7 deletions
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14
src/java/org/apache/poi/ss/usermodel/DateUtil.java
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@ -146,7 +146,7 @@ public class DateUtil {
* @return Java representation of the date, or null if date is not a valid Excel date
*/
public static Date getJavaDate(double date, TimeZone tz) {
return getJavaDate(date, false, tz);
return getJavaDate(date, false, tz, false);
}
/**
* Given an Excel date with using 1900 date windowing, and
@ -166,9 +166,9 @@ public class DateUtil {
* @see java.util.TimeZone
*/
public static Date getJavaDate(double date) {
return getJavaDate(date, (TimeZone)null);
return getJavaDate(date, false, null, false);
}
/**
* Given an Excel date with either 1900 or 1904 date windowing,
* converts it to a java.util.Date.
@ -185,7 +185,7 @@ public class DateUtil {
* @return Java representation of the date, or null if date is not a valid Excel date
*/
public static Date getJavaDate(double date, boolean use1904windowing, TimeZone tz) {
return getJavaCalendar(date, use1904windowing, tz, false).getTime();
return getJavaDate(date, use1904windowing, tz, false);
}
/**
@ -205,7 +205,8 @@ public class DateUtil {
* @return Java representation of the date, or null if date is not a valid Excel date
*/
public static Date getJavaDate(double date, boolean use1904windowing, TimeZone tz, boolean roundSeconds) {
return getJavaCalendar(date, use1904windowing, tz, roundSeconds).getTime();
Calendar calendar = getJavaCalendar(date, use1904windowing, tz, roundSeconds);
return calendar == null ? null : calendar.getTime();
}
/**
@ -228,10 +229,9 @@ public class DateUtil {
* @see java.util.TimeZone
*/
public static Date getJavaDate(double date, boolean use1904windowing) {
return getJavaCalendar(date, use1904windowing, null, false).getTime();
return getJavaDate(date, use1904windowing, null, false);
}
public static void setCalendar(Calendar calendar, int wholeDays,
int millisecondsInDay, boolean use1904windowing, boolean roundSeconds) {
int startYear = 1900;

92
src/testcases/org/apache/poi/ss/usermodel/TestDateUtil.java Normal file
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@ -0,0 +1,92 @@
/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.ss.usermodel;
import static org.junit.Assert.assertEquals;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import org.junit.Test;
public class TestDateUtil {
@Test
public void getJavaDate_InvalidValue() {
double dateValue = -1;
TimeZone tz = TimeZone.getDefault();
boolean use1904windowing = false;
boolean roundSeconds = false;
assertEquals(null, DateUtil.getJavaDate(dateValue));
assertEquals(null, DateUtil.getJavaDate(dateValue, tz));
assertEquals(null, DateUtil.getJavaDate(dateValue, use1904windowing));
assertEquals(null, DateUtil.getJavaDate(dateValue, use1904windowing, tz));
assertEquals(null, DateUtil.getJavaDate(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
public void getJavaDate_ValidValue() {
double dateValue = 0;
TimeZone tz = TimeZone.getDefault();
boolean use1904windowing = false;
boolean roundSeconds = false;
Calendar calendar = Calendar.getInstance(tz);
calendar.set(1900, 0, 0, 0, 0, 0);
calendar.set(Calendar.MILLISECOND, 0);
Date date = calendar.getTime();
assertEquals(date, DateUtil.getJavaDate(dateValue));
assertEquals(date, DateUtil.getJavaDate(dateValue, tz));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing, tz));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
public void getJavaCalendar_InvalidValue() {
double dateValue = -1;
TimeZone tz = TimeZone.getDefault();
boolean use1904windowing = false;
boolean roundSeconds = false;
assertEquals(null, DateUtil.getJavaCalendar(dateValue));
assertEquals(null, DateUtil.getJavaCalendar(dateValue, use1904windowing));
assertEquals(null, DateUtil.getJavaCalendar(dateValue, use1904windowing, tz));
assertEquals(null, DateUtil.getJavaCalendar(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
public void getJavaCalendar_ValidValue() {
double dateValue = 0;
TimeZone tz = TimeZone.getDefault();
boolean use1904windowing = false;
boolean roundSeconds = false;
Calendar calendar = Calendar.getInstance(tz);
calendar.set(1900, 0, 0, 0, 0, 0);
calendar.set(Calendar.MILLISECOND, 0);
assertEquals(calendar, DateUtil.getJavaCalendar(dateValue));
assertEquals(calendar, DateUtil.getJavaCalendar(dateValue, use1904windowing));
assertEquals(calendar, DateUtil.getJavaCalendar(dateValue, use1904windowing, tz));
assertEquals(calendar, DateUtil.getJavaCalendar(dateValue, use1904windowing, tz, roundSeconds));
}
}