com.google.errorprone.refaster.UClassIdent.java Source code

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Here is the source code for com.google.errorprone.refaster.UClassIdent.java

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/*
 * Copyright 2013 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.errorprone.refaster;

import com.google.auto.value.AutoValue;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.errorprone.util.ASTHelpers;
import com.sun.source.tree.Tree;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Nullable;

/**
 * Identifier for a class type.
 *
 * @author lowasser@google.com (Louis Wasserman)
 */
@AutoValue
abstract class UClassIdent extends UIdent {
    @VisibleForTesting
    public static UClassIdent create(String qualifiedName) {
        List<String> topLevelPath = new ArrayList<>();
        for (String component : Splitter.on('.').split(qualifiedName)) {
            topLevelPath.add(component);
            if (Character.isUpperCase(component.charAt(0))) {
                break;
            }
        }
        return create(Joiner.on('.').join(topLevelPath), qualifiedName);
    }

    public static UClassIdent create(ClassSymbol sym) {
        return create(sym.outermostClass().getQualifiedName(), sym.getQualifiedName());
    }

    private static UClassIdent create(CharSequence topLevelClass, CharSequence name) {
        return new AutoValue_UClassIdent(topLevelClass.toString(), StringName.of(name));
    }

    public abstract String getTopLevelClass();

    @Override
    public abstract StringName getName();

    public ClassSymbol resolve(Inliner inliner) throws CouldNotResolveImportException {
        return inliner.resolveClass(getName());
    }

    @Override
    public JCExpression inline(Inliner inliner) throws CouldNotResolveImportException {
        return inliner.importPolicy().classReference(inliner, getTopLevelClass(), getName());
    }

    @Override
    @Nullable
    protected Choice<Unifier> defaultAction(Tree tree, @Nullable Unifier unifier) {
        return unify(ASTHelpers.getSymbol(tree), unifier);
    }

    @Nullable
    public Choice<Unifier> unify(@Nullable Symbol symbol, Unifier unifier) {
        return symbol != null ? getName().unify(symbol.getQualifiedName(), unifier) : Choice.<Unifier>none();
    }
}