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| <title>7. Retrieving Properties Information</title><link rel="stylesheet" href="css/docbook.css" type="text/css"><base href="display"><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"><link rel="start" href="manual.html" title="Apache OpenJPA 2.0 User's Guide"><link rel="up" href="jpa_overview_em.html" title="Chapter 8. EntityManager"><link rel="prev" href="jpa_overview_em_query.html" title="6. Query Factory"><link rel="next" href="jpa_overview_em_closing.html" title="8. Closing"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">7. |
| Retrieving Properties Information |
| </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="jpa_overview_em_query.html">Prev</a> </td><th width="60%" align="center">Chapter 8. |
| EntityManager |
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| Retrieving Properties Information |
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| There are two sets of properties that may be specified: those that |
| are specific to openjpa and those that have been defined by the JPA |
| specification. In some cases, two properties may be equivalent, but |
| have different keys. For example, <span class="emphasis"><em>openjpa.LockTimeout |
| </em></span> and <span class="emphasis"><em>javax.persistence.lock.timeout</em></span> |
| are two different keys for the same property. |
| </p><p> |
| There are two methods that can be used to retrieve information related to |
| properties: |
| </p><div class="itemizedlist"><ul type="disc"><li><p> |
| getProperties() - This method provides a list of current |
| properties. If a property has more than one key, the key |
| that will be returned is the one that was used when the |
| property was set. If the property was not explicitly |
| set, the key defined by JPA specification will be returned |
| with the default value. |
| </p></li><li><p> |
| getSupportedProperties() - This method returns a set of |
| property keys. See the javadoc in the latest JPA |
| specification for the definition of the set. If a property |
| has more than one key, all possible keys will be returned. |
| </p></li></ul></div><p> |
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| Query Factory |
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| Closing |
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