ejemplo de unidad de persistencia con declaracion de propiedades para realizar consultas JPQL desde el IDE

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
             version="2.1">
    <persistence-unit name="PUnombre" transaction-type="JTA">
        <jta-data-source>jdbc/recurso</jta-data-source>

        <properties>

            <!-- Properties for EclipseLink >
            <property name="eclipselink.logging.level" value="INFO"/
            <property name="eclipselink.cache.shared.default" value="false"/>

            <property name="toplink.jdbc.url" value="jdbc:oracle:thin:@//ip/base"/>
            <property name="toplink.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
            <property name="toplink.jdbc.user"/>
            <property name="toplink.jdbc.password"/>
            <property name="hibernate.connection.url" value="jdbc:oracle:thin:@//ip/base"/>
            <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
            <property name="hibernate.connection.username"/>
            <property name="hibernate.connection.password"/>
            <property name="openjpa.ConnectionURL" value="jdbc:oracle:thin:@//ip/base"/>
            <property name="openjpa.ConnectionDriverName" value="oracle.jdbc.OracleDriver"/>
            <property name="openjpa.ConnectionUserName"/>
            <property name="openjpa.ConnectionPassword"/>


            <property name="eclipselink.jdbc.url" value="jdbc:oracle:thin:@//ip/base"/>
            <property name="eclipselink.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
            <property name="eclipselink.jdbc.user" value="nombredeusuario"/>
            <property name="eclipselink.jdbc.password" value="contraseña"/>
            -->


            <property name="eclipselink.jdbc.url" value="jdbc:oracle:thin:@//ip/base"/>
            <property name="eclipselink.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
            <property name="eclipselink.jdbc.user" value="nombredeusuario"/>
            <property name="eclipselink.jdbc.password" value="contraseña"/>
        </properties>
    </persistence-unit>
</persistence>