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Micro Distribution of the Payara Project
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2017 Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package fish.payara.nucleus.microprofile.config.spi;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Optional;
import java.util.Set;
import javax.annotation.Priority;
import org.eclipse.microprofile.config.Config;
import org.eclipse.microprofile.config.spi.ConfigSource;
import org.eclipse.microprofile.config.spi.Converter;
/**
*
* @author Steve Millidge (Payara Foundation)
*/
public class PayaraConfig implements Config {
private final List configSources;
private final HashMap converters;
public PayaraConfig(List configSources, List convertersList) {
this.configSources = configSources;
this.converters = new HashMap<>();
for (Converter converter : convertersList) {
// add each converter to the map for later lookup
Type types[] = converter.getClass().getGenericInterfaces();
for (Type type : types) {
if (type instanceof ParameterizedType) {
Type args[] = ((ParameterizedType) type).getActualTypeArguments();
if (args.length == 1) {
// check if there is one there already
Type cType = args[0];
Converter old = converters.get(cType);
if (old != null) {
if (getPriority(converter) > getPriority(old)) {
this.converters.put(cType, converter);
}
}else {
this.converters.put(cType, converter);
}
}
}
}
}
Collections.sort(configSources, new ConfigSourceComparator());
}
public T getValue(String propertyName, String defaultValue, Class propertyType) {
String result = getValue(propertyName);
if (result == null) {
result = defaultValue;
}
if (result == null) {
throw new NoSuchElementException("Unable to find property with name " + propertyName);
}
return convertString(result, propertyType);
}
@Override
public T getValue(String propertyName, Class propertyType) {
String result = getValue(propertyName);
if (result == null) {
throw new NoSuchElementException("Unable to find property with name " + propertyName);
}
return convertString(result, propertyType);
}
@Override
public Optional getOptionalValue(String propertyName, Class propertyType) {
String strValue = getValue(propertyName);
if(String.class.equals(propertyType)) {
return (Optional) Optional.ofNullable(strValue);
}
Converter converter = getConverter(propertyType);
if (converter == null) {
throw new IllegalArgumentException("No converter for class " + propertyType);
}
return Optional.ofNullable(converter.convert(strValue));
}
@Override
public Iterable getPropertyNames() {
LinkedList result = new LinkedList<>();
for (ConfigSource configSource : configSources) {
result.addAll(configSource.getProperties().keySet());
}
return result;
}
@Override
public Iterable getConfigSources() {
return configSources;
}
public Set getConverterTypes() {
return converters.keySet();
}
private String getValue(String propertyName) {
String result = null;
for (ConfigSource configSource : configSources) {
result = configSource.getValue(propertyName);
if (result != null) {
break;
}
}
return result;
}
private Converter getConverter(Class propertyType) {
Class type = propertyType;
if (type.equals(int.class)) {
type = Integer.class;
} else if (type.equals(long.class)) {
type = Long.class;
} else if (type.equals(double.class)) {
type = Double.class;
} else if (type.equals(float.class)) {
type = Float.class;
} else if (type.equals(boolean.class)) {
type = Boolean.class;
}
Converter converter = converters.get(type);
if (converter == null) {
// search for a matching raw type
for (Type type1 : converters.keySet()) {
if (type1 instanceof ParameterizedType) {
ParameterizedType ptype = (ParameterizedType)type1;
if (ptype.getRawType().equals(propertyType)) {
converter = converters.get(type1);
break;
}
}
}
}
return converter;
}
private int getPriority(Converter converter) {
int result = 100;
Priority annotation = converter.getClass().getAnnotation(Priority.class);
if (annotation != null) {
result = annotation.value();
}
return result;
}
private T convertString(String value, Class propertyType) {
if (String.class.equals(propertyType)) {
return (T) value;
}
// find a converter
Converter converter = getConverter(propertyType);
if (converter == null) {
throw new IllegalArgumentException("No converter for class " + propertyType);
}
return converter.convert(value);
}
}