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

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Here is the source code for com.google.errorprone.refaster.UNewClass.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 static com.google.errorprone.refaster.Unifier.unifications;
import static com.google.errorprone.refaster.Unifier.unifyNullable;

import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.sun.source.tree.NewClassTree;
import com.sun.source.tree.TreeVisitor;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCNewClass;
import java.util.List;
import javax.annotation.Nullable;

/**
 * {@link UTree} version of {@link NewClassTree}, which represents a constructor invocation.
 *
 * @author lowasser@google.com (Louis Wasserman)
 */
@AutoValue
abstract class UNewClass extends UExpression implements NewClassTree {

    public static UNewClass create(UExpression enclosingExpression, List<? extends UExpression> typeArguments,
            UExpression identifier, List<UExpression> arguments, @Nullable UClassDecl classBody) {
        return new AutoValue_UNewClass(enclosingExpression, ImmutableList.copyOf(typeArguments), identifier,
                ImmutableList.copyOf(arguments), classBody);
    }

    public static UNewClass create(List<? extends UExpression> typeArguments, UExpression identifier,
            UExpression... arguments) {
        return create(null, typeArguments, identifier, ImmutableList.copyOf(arguments), null);
    }

    public static UNewClass create(UExpression identifier, UExpression... arguments) {
        return create(ImmutableList.<UExpression>of(), identifier, arguments);
    }

    @Override
    @Nullable
    public abstract UExpression getEnclosingExpression();

    /**
     * Note: these are not the type arguments to the class, but to the constructor, for
     * those extremely rare constructors that look like e.g. {@code <E> Foo(E e)}, where
     * the type parameter is for the constructor alone and not the class. 
     */
    @Override
    public abstract List<UExpression> getTypeArguments();

    @Override
    public abstract UExpression getIdentifier();

    @Override
    public abstract List<UExpression> getArguments();

    @Override
    @Nullable
    public abstract UClassDecl getClassBody();

    @Override
    @Nullable
    public Choice<Unifier> visitNewClass(NewClassTree newClass, @Nullable Unifier unifier) {
        return unifyNullable(unifier, getEnclosingExpression(), newClass.getEnclosingExpression())
                .thenChoose(unifications(getTypeArguments(), newClass.getTypeArguments()))
                .thenChoose(unifications(getIdentifier(), newClass.getIdentifier()))
                .thenChoose(unifications(getClassBody(), newClass.getClassBody()))
                .thenChoose(unifications(getArguments(), newClass.getArguments()));
    }

    @Override
    public Kind getKind() {
        return Kind.NEW_CLASS;
    }

    @Override
    public <R, D> R accept(TreeVisitor<R, D> visitor, D data) {
        return visitor.visitNewClass(this, data);
    }

    @Override
    public JCNewClass inline(Inliner inliner) throws CouldNotResolveImportException {
        return inliner.maker().NewClass(
                (getEnclosingExpression() == null) ? null : getEnclosingExpression().inline(inliner),
                inliner.<JCExpression>inlineList(getTypeArguments()), getIdentifier().inline(inliner),
                inliner.<JCExpression>inlineList(getArguments()),
                (getClassBody() == null) ? null : getClassBody().inline(inliner));
    }
}