/*******************************************************************************
* Copyright (c)2015 IBM Corporation. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* 02/19/2015 - Rick Curtis
* - 458877 : Add national character support
* 03/06/2015-2.7.0 Dalia Abo Sheasha
* - 461607: PropertiesUtils does not process methods with String parameters correctly.
* 05/06/2015-2.7.0 Rick Curtis
* - 466626: Fix bug in getMethods() when Java 2 security is enabled.
******************************************************************************/
package org.eclipse.persistence.config;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.persistence.exceptions.ConversionException;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetMethods;
import org.eclipse.persistence.internal.security.PrivilegedMethodInvoker;
/**
* A static utility class that handles parsing a String
* "key=value,key1=value1...." and calls an appropriate set[key]([value]) method
* on the provided instance.
*/
public class PropertiesUtils {
/**
* Attempts to parse and then set the provided kvs String into the
* appropriate set method on the provided instance.
*
* Note: Keys and values cannot contain '=' or ','
*
* @param instance
* An JavaBean instance
* @param propertyName
* The configuration name that is being set into instance. This
* is only used for informational purposes.
* @param kvs
* A String of key=value comma delimited ie: k1=v1,k2=v2,...
* @throws org.eclipse.persistence.exceptions.ConversionException
* if unable to process the provided kvs
*/
public static void set(Object instance, String propertyName, String kvs) {
if (instance == null || kvs == null || kvs.trim().isEmpty()) {
return;
}
String[] keyValues = kvs.split(",");
for (String kv : keyValues) {
processKeyValue(instance, propertyName, kv);
}
}
private static void processKeyValue(Object instance, String propertyName, String kv) {
String[] t = kv.split("=");
if (t.length != 2) {
// We must have a single key and a single value.
throw ConversionException.couldNotTranslatePropertiesIntoObject(instance, propertyName, kv, null);
}
String methodName = "set" + t[0].trim();
// Stringified value to be set. Need to figure out it's type
String value = t[1].trim();
List<Method> methods = getMethodsMatchingName(instance, methodName);
MethodMatch match = null;
try {
match = getMethodMatchingParameter(methods, value);
} catch (Exception e) {
throw ConversionException.couldNotTranslatePropertiesIntoObject(instance, propertyName, kv, e);
}
if (match != null) {
Method method = match.getMethod();
Object parsedValue = match.getParsedValue();
try {
invokeMethod(method, instance, parsedValue);
} catch (Exception e) {
throw ConversionException.couldNotTranslatePropertiesIntoObject(instance, propertyName, kv, e);
}
} else {
throw ConversionException.couldNotTranslatePropertiesIntoObject(instance, propertyName, kv, null);
}
}
private static MethodMatch getMethodMatchingParameter(List<Method> methods, String parameter) throws Exception {
Object parsedParameterValue = null;
Method res = null;
for (Method method : methods) {
Class<?>[] params = method.getParameterTypes();
if (params.length == 1) {
Class<?> param = params[0];
if (param == String.class) {
parsedParameterValue = parameter;
} else if (param == Integer.class || param == int.class) {
parsedParameterValue = Integer.parseInt(parameter);
} else if (param == Boolean.class || param == boolean.class) {
// Don't use Boolean.parseBoolean(..) as it is to liberal
// with it's interpretation of false values
String lower = parameter.toLowerCase();
if ("true".equals(lower)) {
parsedParameterValue = Boolean.TRUE;
} else if ("false".equals(lower)) {
parsedParameterValue = Boolean.FALSE;
}
} else if (param == Long.class || param == long.class) {
parsedParameterValue = Long.parseLong(parameter);
} else if (param == Float.class || param == float.class) {
parsedParameterValue = Float.parseFloat(parameter);
} else if (param == Double.class || param == double.class) {
parsedParameterValue = Double.parseDouble(parameter);
}
}
if (parsedParameterValue != null) {
return new MethodMatch(method, parsedParameterValue);
}
}// end for
return null;
}
private static List<Method> getMethodsMatchingName(Object instance, String methodName) {
List<Method> methods = new ArrayList<>();
for (Method method : getMethods(instance.getClass())) {
if (method.getName().equalsIgnoreCase(methodName)) {
methods.add(method);
}
}
return methods;
}
private static Method[] getMethods(Class<?> cls) {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
return AccessController.doPrivileged(new PrivilegedGetMethods(cls));
}
return PrivilegedAccessHelper.getMethods(cls);
}
private static Object invokeMethod(Method method, Object instance, Object... params) throws Exception {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
return AccessController.doPrivileged(new PrivilegedMethodInvoker(method, instance, params));
}
return method.invoke(instance, params);
}
private static class MethodMatch {
final Method method;
final Object parsedValue;
public MethodMatch(Method m, Object p) {
method = m;
parsedValue = p;
}
public Method getMethod() {
return method;
}
public Object getParsedValue() {
return parsedValue;
}
}
}