package org.graalvm.compiler.core.test;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import jdk.internal.vm.compiler.collections.EconomicMap;
import jdk.internal.vm.compiler.collections.MapCursor;
import org.graalvm.compiler.options.Option;
import org.graalvm.compiler.options.OptionDescriptor;
import org.graalvm.compiler.options.OptionDescriptors;
import org.graalvm.compiler.options.OptionKey;
import org.graalvm.compiler.options.OptionType;
import org.graalvm.compiler.options.OptionValues;
public class ReflectionOptionDescriptors implements OptionDescriptors {
public static EconomicMap<String, String> (Properties properties, String prefix, boolean stripPrefix) {
EconomicMap<String, String> matches = EconomicMap.create();
for (Map.Entry<Object, Object> e : properties.entrySet()) {
String name = (String) e.getKey();
if (name.startsWith(prefix)) {
String value = (String) e.getValue();
if (stripPrefix) {
name = name.substring(prefix.length());
}
matches.put(name, value);
}
}
return matches;
}
private final EconomicMap<String, OptionDescriptor> descriptors = EconomicMap.create();
public ReflectionOptionDescriptors(Class<?> declaringClass, String... fieldsAndHelp) {
assert fieldsAndHelp.length % 2 == 0;
for (int i = 0; i < fieldsAndHelp.length; i += 2) {
String fieldName = fieldsAndHelp[i];
String help = fieldsAndHelp[i + 1];
addOption(declaringClass, fieldName, help);
}
}
public ReflectionOptionDescriptors(Class<?> declaringClass, EconomicMap<String, String> fieldsAndHelp) {
MapCursor<String, String> cursor = fieldsAndHelp.getEntries();
while (cursor.advance()) {
String fieldName = cursor.getKey();
String help = cursor.getValue();
addOption(declaringClass, fieldName, help);
}
}
private void addOption(Class<?> declaringClass, String fieldName, String help) {
try {
Field f = declaringClass.getDeclaredField(fieldName);
if (!OptionKey.class.isAssignableFrom(f.getType())) {
throw new IllegalArgumentException(String.format("Option field must be of type %s: %s", OptionKey.class.getName(), f));
}
if (!Modifier.isStatic(f.getModifiers())) {
throw new IllegalArgumentException(String.format("Option field must be static: %s", f));
}
f.setAccessible(true);
Type declaredType = f.getAnnotatedType().getType();
if (!(declaredType instanceof ParameterizedType)) {
throw new IllegalArgumentException(String.format("Option field must have a parameterized type: %s", f));
}
ParameterizedType pt = (ParameterizedType) declaredType;
Type[] actualTypeArguments = pt.getActualTypeArguments();
assert actualTypeArguments.length == 1;
Class<?> optionValueType = (Class<?>) actualTypeArguments[0];
descriptors.put(fieldName, OptionDescriptor.create(fieldName, OptionType.Debug, optionValueType, help, declaringClass, fieldName, (OptionKey<?>) f.get(null)));
} catch (IllegalAccessException | NoSuchFieldException e) {
throw new IllegalArgumentException(e);
}
}
@Override
public Iterator<OptionDescriptor> iterator() {
return descriptors.getValues().iterator();
}
@Override
public OptionDescriptor get(String value) {
return descriptors.get(value);
}
}