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package org.jetbrains.protocolReader;
import org.jetbrains.io.JsonReaderEx;
import gnu.trove.THashSet;
import org.jetbrains.jsonProtocol.JsonParseMethod;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.*;
class ReaderRoot<R> {
private final Class<R> rootClass;
private final LinkedHashMap<Class<?>, TypeHandler<?>> typeToTypeHandler;
private final Set<Class<?>> visitedInterfaces = new THashSet<>(1);
final LinkedHashMap<Method, ReadDelegate> methodMap = new LinkedHashMap<>();
ReaderRoot(Class<R> rootClass, LinkedHashMap<Class<?>, TypeHandler<?>> typeToTypeHandler) {
this.rootClass = rootClass;
this.typeToTypeHandler = typeToTypeHandler;
readInterfaceRecursive(rootClass);
}
private void readInterfaceRecursive(Class<?> clazz) throws JsonProtocolModelParseException {
if (visitedInterfaces.contains(clazz)) {
return;
}
visitedInterfaces.add(clazz);
// todo sort by source location
Method[] methods = clazz.getMethods();
Arrays.sort(methods, new Comparator<Method>() {
@Override
public int compare(Method o1, Method o2) {
return o1.getName().compareTo(o2.getName());
}
});
for (Method m : methods) {
JsonParseMethod jsonParseMethod = m.getAnnotation(JsonParseMethod.class);
if (jsonParseMethod == null) {
continue;
}
Class<?>[] exceptionTypes = m.getExceptionTypes();
if (exceptionTypes.length > 1) {
throw new JsonProtocolModelParseException("Too many exception declared in " + m);
}
Type returnType = m.getGenericReturnType();
boolean isList = false;
if (returnType instanceof ParameterizedType) {
ParameterizedType parameterizedType = (ParameterizedType)returnType;
if (parameterizedType.getRawType() == List.class) {
isList = true;
returnType = parameterizedType.getActualTypeArguments()[0];
}
}
//noinspection SuspiciousMethodCalls
TypeHandler<?> typeHandler = typeToTypeHandler.get(returnType);
if (typeHandler == null) {
typeHandler = InterfaceReader.createHandler(typeToTypeHandler, m.getReturnType());
if (typeHandler == null) {
throw new JsonProtocolModelParseException("Unknown return type in " + m);
}
}
Type[] arguments = m.getGenericParameterTypes();
if (arguments.length != 1) {
throw new JsonProtocolModelParseException("Exactly one argument is expected in " + m);
}
Type argument = arguments[0];
if (argument == JsonReaderEx.class || argument == Object.class) {
methodMap.put(m, new ReadDelegate(typeHandler, isList));
}
else {
throw new JsonProtocolModelParseException("Unrecognized argument type in " + m);
}
}
for (Type baseType : clazz.getGenericInterfaces()) {
if (!(baseType instanceof Class)) {
throw new JsonProtocolModelParseException("Base interface must be class in " + clazz);
}
Class<?> baseClass = (Class<?>) baseType;
readInterfaceRecursive(baseClass);
}
}
public Class<R> getType() {
return rootClass;
}
public void writeStaticMethodJava(ClassScope scope) {
TextOutput out = scope.getOutput();
for (Map.Entry<Method, ReadDelegate> en : methodMap.entrySet()) {
out.newLine();
en.getValue().write(scope, en.getKey(), out);
out.newLine();
}
}
}
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