com.google.errorprone.refaster.UTry Maven / Gradle / Ivy
/*
* Copyright 2014 The Error Prone Authors.
*
* 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.unifyList;
import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.sun.source.tree.TreeVisitor;
import com.sun.source.tree.TryTree;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCTry;
import javax.annotation.Nullable;
/**
* {@code UTree} representation of a {@code TryTree}.
*
* @author [email protected] (Louis Wasserman)
*/
@AutoValue
abstract class UTry extends USimpleStatement implements TryTree {
static UTry create(
Iterable> resources,
UBlock block,
Iterable catches,
@Nullable UBlock finallyBlock) {
return new AutoValue_UTry(
ImmutableList.copyOf(resources), block, ImmutableList.copyOf(catches), finallyBlock);
}
@Override
public abstract ImmutableList> getResources();
@Override
public abstract UBlock getBlock();
@Override
public abstract ImmutableList getCatches();
@Override
@Nullable
public abstract UBlock getFinallyBlock();
@Override
public Kind getKind() {
return Kind.TRY;
}
@Override
public R accept(TreeVisitor visitor, D data) {
return visitor.visitTry(this, data);
}
@Override
public JCTry inline(Inliner inliner) throws CouldNotResolveImportException {
return inliner
.maker()
.Try(
inliner.inlineList(getResources()),
getBlock().inline(inliner),
inliner.inlineList(getCatches()),
inlineFinallyBlock(inliner));
}
/** Skips the finally block if the result would be empty. */
@Nullable
private JCBlock inlineFinallyBlock(Inliner inliner) throws CouldNotResolveImportException {
if (getFinallyBlock() != null) {
JCBlock block = getFinallyBlock().inline(inliner);
if (!block.getStatements().isEmpty()) {
return block;
}
}
return null;
}
@Override
@Nullable
public Choice visitTry(TryTree node, @Nullable Unifier unifier) {
return unifyList(unifier, getResources(), node.getResources())
.thenChoose(unifications(getBlock(), node.getBlock()))
.thenChoose(unifications(getCatches(), node.getCatches()))
.thenChoose(unifications(getFinallyBlock(), node.getFinallyBlock()));
}
}