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/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.turbine.binder;
import com.google.turbine.binder.bound.BoundClass;
import com.google.turbine.binder.bound.HeaderBoundClass;
import com.google.turbine.binder.env.CompoundEnv;
import com.google.turbine.binder.env.Env;
import com.google.turbine.binder.lookup.CanonicalSymbolResolver;
import com.google.turbine.binder.lookup.LookupResult;
import com.google.turbine.binder.sym.ClassSymbol;
/** Qualified name resolution. */
public class Resolve {
/**
* Performs JLS 6.5.5.2 qualified type name resolution of a type with the given simple name,
* qualified by the given symbol. The search considers members that are inherited from
* superclasses or interfaces.
*/
public static ClassSymbol resolve(
Env<ClassSymbol, ? extends HeaderBoundClass> env, ClassSymbol sym, String simpleName) {
ClassSymbol result;
HeaderBoundClass bound = env.get(sym);
if (bound == null) {
return null;
}
result = bound.children().get(simpleName);
if (result != null) {
return result;
}
if (bound.superclass() != null) {
result = resolve(env, bound.superclass(), simpleName);
if (result != null) {
return result;
}
}
for (ClassSymbol i : bound.interfaces()) {
result = resolve(env, i, simpleName);
if (result != null) {
return result;
}
}
return null;
}
static class CanonicalResolver implements CanonicalSymbolResolver {
private final CompoundEnv<ClassSymbol, BoundClass> env;
public CanonicalResolver(CompoundEnv<ClassSymbol, BoundClass> env) {
this.env = env;
}
@Override
public ClassSymbol resolve(LookupResult result) {
ClassSymbol sym = (ClassSymbol) result.sym();
for (String bit : result.remaining()) {
sym = resolveOne(sym, bit);
if (sym == null) {
return null;
}
}
return sym;
}
@Override
public ClassSymbol resolveOne(ClassSymbol sym, String bit) {
BoundClass ci = env.get(sym);
if (ci == null) {
return null;
}
sym = ci.children().get(bit);
if (sym == null) {
return null;
}
return sym;
}
}
}
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