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Implement XML properties support. #5

lviggiano opened this issue Jan 20, 2013 · 5 comments

Implement XML properties support. #5

lviggiano opened this issue Jan 20, 2013 · 5 comments


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@lviggiano lviggiano commented Jan 20, 2013

Since JDK 1.5 Java properties support XML format via loadFromXML() and storeToXML()

There is no reason why OWNER API shouldn't implement those two methods.

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@maroun-baydoun maroun-baydoun commented Jan 20, 2013

The ability to marshal/unmarshal XML documents is already implemented in JAXB, so maybe that can be a starting point.

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@lviggiano lviggiano commented Jan 20, 2013

sure thing, but it's easier than that: java.util.Properties have the method already implemented, I just need to forward the method invokation. See PropertyInvocationHandler:

public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    // I just need to add something like:
    // if (method == storeToXML()) {
    //      properties.storeToXML(args); 
    //      return null;
    // }
    String key = key(method);
    String defaultValue = defaultValue(method);
    String value = properties.getProperty(key, defaultValue);
    if (value == null)
        return null;
    return convert(method.getReturnType(), format(value, args)); // TODO: variable expansion here would be nice

Very simple.

Then change the Config interface to add the storeToXML() method.

It's a little bit more complicate intead for the load (which I should implement in the ConfigFactory.load(InputStream))

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@lviggiano lviggiano commented Jan 24, 2013

Looking at how XML properties are implemented in Java, now I find the reason why not to have them in Owner API.

Not sure this will be available anytime soon.

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@lviggiano lviggiano commented Feb 9, 2013

link to #14

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@lviggiano lviggiano commented Jul 21, 2013

Almost done :)

on master branch OWNER is able to load xml files into properties. The format can be the one specified by the DTD of the properties class, or an xml specified by the user on his own taste.

Example of xml accepted, as specified by the DTD in properties class:

The ugly java format:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE properties SYSTEM "">
    <comment>this is an example</comment>
    <entry key="server.ssh.alive.interval">60</entry>
    <entry key="server.ssh.address"></entry>
    <entry key="server.http.port">80</entry>
    <entry key="server.http.hostname">localhost</entry>
    <entry key="server.ssh.user">admin</entry>
    <entry key="server.ssh.port">22</entry>

A better example (the content is the same as above, and both will work the same way for OWNER):

    <http port="80">
    <ssh port="22">
        <alive interval="60"/>

Example of the mapping interface for the above xml examples

interface ServerConfig extends Config {

    int httpPort();

    String httpHostname();

    int sshPort();

    String sshAddress();

    int aliveInterval();

    String sshUser();
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