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Posted to commits@isis.apache.org by bu...@apache.org on 2013/08/15 19:14:32 UTC
svn commit: r874782 - in /websites/staging/isis/trunk: cgi-bin/ content/
content/components/objectstores/jdo/about.html
content/components/objectstores/jdo/mapping-bigdecimals.html
content/documentation.html
Author: buildbot
Date: Thu Aug 15 17:14:32 2013
New Revision: 874782
Log:
Staging update by buildbot for isis
Added:
websites/staging/isis/trunk/content/components/objectstores/jdo/mapping-bigdecimals.html
Modified:
websites/staging/isis/trunk/cgi-bin/ (props changed)
websites/staging/isis/trunk/content/ (props changed)
websites/staging/isis/trunk/content/components/objectstores/jdo/about.html
websites/staging/isis/trunk/content/documentation.html
Propchange: websites/staging/isis/trunk/cgi-bin/
------------------------------------------------------------------------------
--- cms:source-revision (original)
+++ cms:source-revision Thu Aug 15 17:14:32 2013
@@ -1 +1 @@
-1514375
+1514382
Propchange: websites/staging/isis/trunk/content/
------------------------------------------------------------------------------
--- cms:source-revision (original)
+++ cms:source-revision Thu Aug 15 17:14:32 2013
@@ -1 +1 @@
-1514375
+1514382
Modified: websites/staging/isis/trunk/content/components/objectstores/jdo/about.html
==============================================================================
--- websites/staging/isis/trunk/content/components/objectstores/jdo/about.html (original)
+++ websites/staging/isis/trunk/content/components/objectstores/jdo/about.html Thu Aug 15 17:14:32 2013
@@ -272,6 +272,7 @@
<ul>
<li><a href="mapping-mandatory-and-optional-properties.html">Mapping Mandatory and Optional Properties</a></li>
<li><a href="mapping-joda-dates.html">Mapping JODA Dates</a></li>
+<li><a href="mapping-bigdecimals.html">Mapping BigDecimals</a></li>
<li><a href="components/objectstores/jdo/mapping-blobs.html">Mapping Blobs</a></li>
<li><a href="lazy-loading.html">Lazy Loading</a></li>
<li><a href="managed-1-to-m-relationships.html">Managed 1:m bidirectional relationships</a></li>
Added: websites/staging/isis/trunk/content/components/objectstores/jdo/mapping-bigdecimals.html
==============================================================================
--- websites/staging/isis/trunk/content/components/objectstores/jdo/mapping-bigdecimals.html (added)
+++ websites/staging/isis/trunk/content/components/objectstores/jdo/mapping-bigdecimals.html Thu Aug 15 17:14:32 2013
@@ -0,0 +1,332 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+
+ <meta charset="utf-8">
+ <title>Mapping BigDecimals</title>
+ <meta name="description" content="">
+ <meta name="author" content="">
+
+ <!-- Le HTML5 shim, for IE6-8 support of HTML elements -->
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+ <link href="./../../../bootstrap.css" rel="stylesheet">
+ <link href="./../../../prettify.css" rel="stylesheet">
+
+ <style type="text/css">
+ body {
+ padding-top: 60px;
+ }
+ .sprite {
+ display: inline-block;
+ height: 20px;
+ margin: 0 auto 4px;
+ outline: medium none;
+ text-indent: -999em;
+ width: 24px;
+ background-image: url('./../../../images/sprites.png');
+ background-repeat: no-repeat;
+ overflow: hidden;
+ cursor: pointer;
+ }
+ .edit-page {
+ display: inline-block;
+ height: 20px;
+ margin: 0 auto 4px;
+ outline: medium none;
+ text-indent: -999em;
+ width: 24px;
+ background-image: url('./../../../images/edit.png');
+ background-repeat: no-repeat;
+ overflow: hidden;
+ cursor: pointer;
+ }
+ .fb-share {
+ background-position: 0px -40px;
+ }
+ .gp-share {
+ background-position: 0px 0px;
+ }
+ .tw-share {
+ background-position: 0px -80px;
+ }
+ .markdown-content {
+ min-height: 500px;
+ }
+ .book-image img {
+ border: 1px;
+ border-style: solid;
+ }
+ .release-matrix .heading {
+ background-color: #eeeeee;
+ }
+ .release-matrix .new {
+ color: #dd0000;
+ font-weight: bolder;
+ }
+ .stub,.note {
+ position: relative;
+ padding: 7px 15px;
+ margin-bottom: 18px;
+ color: #404040;
+ background-color: #eedc94;
+ background-repeat: repeat-x;
+ background-image: -khtml-gradient(linear, left top, left bottom, from(#fceec1), to(#eedc94));
+ background-image: -moz-linear-gradient(top, #fceec1, #eedc94);
+ background-image: -ms-linear-gradient(top, #fceec1, #eedc94);
+ background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fceec1), color-stop(100%, #eedc94));
+ background-image: -webkit-linear-gradient(top, #fceec1, #eedc94);
+ background-image: -o-linear-gradient(top, #fceec1, #eedc94);
+ background-image: linear-gradient(top, #fceec1, #eedc94);
+ filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fceec1', endColorstr='#eedc94', GradientType=0);
+ text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
+ border-color: #eedc94 #eedc94 #e4c652;
+ border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
+ text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
+ border-width: 1px;
+ border-style: solid;
+ -webkit-border-radius: 4px;
+ -moz-border-radius: 4px;
+ border-radius: 4px;
+ -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
+ -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
+ box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
+ }
+ </style>
+ <script type="text/javascript">
+ function fbshare () {
+ window.open(
+ "http://www.facebook.com/sharer/sharer.php?u="+document.URL,
+ 'Share on Facebook',
+ 'width=640,height=426');
+ };
+ function gpshare () {
+ window.open(
+ "https://plus.google.com/share?url="+document.URL,
+ 'Share on Google+',
+ 'width=584,height=385');
+ };
+ function twshare () {
+ window.open(
+ "https://twitter.com/intent/tweet?url="+document.URL+"&text=Mapping BigDecimals",
+ 'Share on Twitter',
+ 'width=800,height=526');
+ };
+ </script>
+
+ <!-- Le fav and touch icons -->
+ <link rel="shortcut icon" href="./../../../images/favicon.ico">
+ <!--
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+ <link rel="apple-touch-icon" sizes="114x114" href="./../../../images/apple-touch-icon-114x114.png">
+ -->
+
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+ <script src="./../../../javascript/jquery-latest.js"></script>
+
+
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+ <script src="./../../../javascript/common.js"></script>
+ <script src="./../../../javascript/prettyprint.js"></script>
+
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+ <script src="./../../../javascript/bootstrap-dropdown.js"></script>
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+ <script src="./../../../javascript/bootstrap-button.js"></script>
+ <script src="./../../../javascript/bootstrap-popover.js"></script>
+ <script src="./../../../javascript/bootstrap-scrollspy.js"></script>
+ <script src="./../../../javascript/bootstrap-typeahead.js"></script>
+ <script src="./../../../javascript/bootstrap-carousel.js"></script>
+ <script src="./../../../javascript/bootstrap-tab.js"></script>
+ <script src="./../../../javascript/bootstrap-collapse.js"></script>
+
+
+
+
+
+ <script>
+ $(function () { prettyPrint() })
+ $().dropdown()
+ </script>
+
+ <!-- GAQ stuff removed here -->
+
+
+ </head>
+
+ <body>
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+ </ul>
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+ <!-- Google CSE Search Box Begins -->
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+ <input type="text" name="q" placeholder="Search" size="31" style="border: 1px solid rgb(126, 157, 185); padding: 2px; background-color: rgb(255, 255, 255); background-position: 0% 50%; background-repeat: no-repeat no-repeat;">
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+
+
+<div class="page-header">
+<p><a href="./../../../documentation.html">Docs</a> » <a href="./../../../components/about.html">Components</a> » <a href="./../../../components/objectstores/about.html">Objectstores</a> » <a href="./../../../components/objectstores/jdo/about.html">Jdo</a></p>
+<h1>Mapping BigDecimals
+
+</h1>
+</div>
+
+<p>Working with <code>java.math.BigDecimal</code> properties takes a little care due to scale/precision issues. This is certainly the case for HSQL, and (may be the case ) for all other RDBMS' too.</p>
+
+<p>For example, suppose we have:</p>
+
+<pre><code> private BigDecimal impact;
+
+ public BigDecimal getImpact() {
+ return impact;
+ }
+ public void setImpact(final BigDecimal impact) {
+ this.impact = impact;
+ }
+</code></pre>
+
+<p>JDO/DataNucleus creates, at least with HSQL, the table with the field type as NUMERIC(19). No decimal digits are admitted. (Further details <a href="http://hsqldb.org/doc/2.0/guide/sqlgeneral-chapt.html#sgc_numeric_types">here</a>).</p>
+
+<p>What this implies is that, when a record is inserted, a log entry similar to this one appears:</p>
+
+<pre><code>INSERT INTO ENTITY(..., IMPACT, ....) VALUES (...., 0.5, ....)
+</code></pre>
+
+<p>But when that same record is retrieved, the log will show that a value of "0" is returned, instead of 0.5.</p>
+
+<p>The solution is to explicitly add the scale to the field like this:</p>
+
+<pre><code>@javax.jdo.annotations.Column(scale=2)
+private BigDecimal impact;
+
+public BigDecimal getImpact() {
+ return impact;
+}
+public void setImpact(final BigDecimal impact) {
+ this.impact = impact;
+}
+</code></pre>
+
+<p>In addition, you should also set the scale of the <code>BigDecimal</code>, using <code>setScale(scale, roundingMode)</code>. More information can be found <a href="http://www.opentaps.org/docs/index.php/How_to_Use_Java_BigDecimal:_A_Tutorial">here</a> and <a href="http://www.tutorialspoint.com/java/math/bigdecimal_setscale_rm_roundingmode.htm">here</a>.</p>
+
+
+
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Modified: websites/staging/isis/trunk/content/documentation.html
==============================================================================
--- websites/staging/isis/trunk/content/documentation.html (original)
+++ websites/staging/isis/trunk/content/documentation.html Thu Aug 15 17:14:32 2013
@@ -460,6 +460,7 @@
<ul>
<li><a href="components/objectstores/jdo/mapping-mandatory-and-optional-properties.html">Mapping Mandatory and Optional Properties</a></li>
<li><a href="components/objectstores/jdo/mapping-joda-dates.html">Mapping JODA Dates</a></li>
+<li><a href="components/objectstores/jdo/mapping-bigdecimals.html">Mapping BigDecimals</a></li>
<li><a href="components/objectstores/jdo/mapping-blobs.html">Mapping Blobs</a></li>
<li><a href="components/objectstores/jdo/lazy-loading.html">Lazy Loading</a></li>
<li><a href="components/objectstores/jdo/managed-1-to-m-relationships.html">Managed 1:m bidirectional relationships</a></li>