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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.server;
import java.lang.reflect.Constructor;
import java.util.Properties;
import com.vaadin.terminal.DeploymentConfiguration;
public abstract class AbstractDeploymentConfiguration implements
DeploymentConfiguration {
private final Class<?> systemPropertyBaseClass;
private final Properties applicationProperties = new Properties();
public AbstractDeploymentConfiguration(Class<?> systemPropertyBaseClass) {
this.systemPropertyBaseClass = systemPropertyBaseClass;
}
@Override
public String getApplicationOrSystemProperty(String propertyName,
String defaultValue) {
String val = null;
// Try application properties
val = getApplicationProperty(propertyName);
if (val != null) {
return val;
}
// Try system properties
val = getSystemProperty(propertyName);
if (val != null) {
return val;
}
return defaultValue;
}
/**
* Gets an system property value.
*
* @param parameterName
* the Name or the parameter.
* @return String value or null if not found
*/
protected String getSystemProperty(String parameterName) {
String val = null;
String pkgName;
final Package pkg = systemPropertyBaseClass.getPackage();
if (pkg != null) {
pkgName = pkg.getName();
} else {
final String className = systemPropertyBaseClass.getName();
pkgName = new String(className.toCharArray(), 0,
className.lastIndexOf('.'));
}
val = System.getProperty(pkgName + "." + parameterName);
if (val != null) {
return val;
}
// Try lowercased system properties
val = System.getProperty(pkgName + "." + parameterName.toLowerCase());
return val;
}
@Override
public ClassLoader getClassLoader() {
final String classLoaderName = getApplicationOrSystemProperty(
"ClassLoader", null);
ClassLoader classLoader;
if (classLoaderName == null) {
classLoader = getClass().getClassLoader();
} else {
try {
final Class<?> classLoaderClass = getClass().getClassLoader()
.loadClass(classLoaderName);
final Constructor<?> c = classLoaderClass
.getConstructor(new Class[] { ClassLoader.class });
classLoader = (ClassLoader) c
.newInstance(new Object[] { getClass().getClassLoader() });
} catch (final Exception e) {
throw new RuntimeException(
"Could not find specified class loader: "
+ classLoaderName, e);
}
}
return classLoader;
}
/**
* Gets an application property value.
*
* @param parameterName
* the Name or the parameter.
* @return String value or null if not found
*/
protected String getApplicationProperty(String parameterName) {
String val = applicationProperties.getProperty(parameterName);
if (val != null) {
return val;
}
// Try lower case application properties for backward compatibility with
// 3.0.2 and earlier
val = applicationProperties.getProperty(parameterName.toLowerCase());
return val;
}
@Override
public Properties getInitParameters() {
return applicationProperties;
}
}
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