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Provides Database/XML Replication through JPA
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package de.tsl2.nano.replication.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.invoke.MethodType;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.stream.Collectors;
public class Util {
static Map consumedProps = new HashMap<>(); //for system.out prints...as help
public static String getProperty(String name, String defaultOrMandatory, String info) {
return getProperty(name, String.class, defaultOrMandatory, info);
}
public static T getProperty(String name, Class type) {
return getProperty(name, type, null, null);
}
@SuppressWarnings("unchecked")
public static T getProperty(String name, Class type, T defaultOrMandatory, String info) {
assert defaultOrMandatory == null || type.isAssignableFrom(defaultOrMandatory.getClass());
T value = null;
if (type.equals(String.class))
value = (T) System.getProperty(name, (String)defaultOrMandatory);
else if (type.equals(Boolean.class))
value = type.cast(Boolean.getBoolean(name)); //TODO: involve defaultOrMandatory
else if (type.equals(Integer.class))
value = type.cast(Integer.getInteger(name)); //TODO: involve defaultOrMandatory
assert info == null || value != null : "Please define -D" + name + " " + info;
if (value != null)
ULog.log(" " + name + "=" + value, !String.class.equals(type));
consumedProps.put(name, value);
return value;
}
public static ClassLoader linkResourcePath(String origin, String link) {
ClassLoader originCL = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(new URLClassLoader(((URLClassLoader)originCL).getURLs()) {
@Override
public Enumeration getResources(String name) throws IOException {
if (name.equals(origin)) {
ULog.log("..loading " + link + "...", false);
return super.getResources(link);
}
return super.getResources(name);
}
});
return originCL;
}
public static Map getConsumedProperties() {
return consumedProps;
}
public static Properties loadPropertiesToSystem(String file) {
Properties props = new Properties();
try {
ULog.log("loading optional properties from " + file + "...", false, new Object[0]);
if (Files.exists(Paths.get(file))) {
props.load(Files.newInputStream(Paths.get(file)));
System.getProperties().putAll(props);
ULog.log("done");
} else {
ULog.log("file does not exist!");
}
return props;
} catch (IOException e) {
ULog.log(e.toString()); //optional
return null;
}
}
public static String[] mergeArgsAndProps(String[] args, int minargs, Properties props) {
if (props != null) {
ArrayList
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