/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* questions.
*/
/*
* @test
* @bug 8041648
* @summary Verify that end positions are sane if semicolons are missing.
* @modules jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.file
* jdk.compiler/com.sun.tools.javac.parser
* jdk.compiler/com.sun.tools.javac.tree
* jdk.compiler/com.sun.tools.javac.util
* @run main MissingSemicolonTest MissingSemicolonTest.java
*/
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.nio.file.Files;
import java.util.*;
import javax.tools.*;
import com.sun.source.tree.*;
import com.sun.source.tree.Tree.Kind;
import com.sun.source.util.*;
import com.sun.tools.javac.api.JavacTool;
import com.sun.tools.javac.parser.Scanner;
import com.sun.tools.javac.parser.ScannerFactory;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.util.Context;
public class MissingSemicolonTest {
public static void main(String... args) throws IOException {
String testSrc = System.getProperty("test.src");
File baseDir = new File(testSrc);
boolean ok = new MissingSemicolonTest().run(baseDir, args);
if (!ok) {
throw new Error("failed");
}
}
boolean run(File baseDir, String... args) throws IOException {
try {
if (args.length == 0) {
throw new IllegalStateException("Needs input files.");
}
for (String arg : args) {
File file = new File(baseDir, arg);
if (file.exists())
test(file);
else
error("File not found: " + file);
}
System.err.println(fileCount + " files read");
if (errors > 0)
System.err.println(errors + " errors");
return errors == 0;
} finally {
fm.close();
}
}
void test(File file) {
if (file.isFile() && file.getName().endsWith(".java")) {
try {
fileCount++;
String content = new String(Files.readAllBytes(file.toPath()));
List<int[]> spans = gatherTreeSpans(file, content);
int nextSemicolon = -1;
//remove semicolons, one at a time, and verify the positions are still meaningful:
while ((nextSemicolon = content.indexOf(';', nextSemicolon + 1)) != (-1)) {
String updatedContent =
content.substring(0, nextSemicolon) +
" " +
content.substring(nextSemicolon + 1);
verifyTreeSpans(file, spans, updatedContent, nextSemicolon);
}
} catch (IOException e) {
error("Error reading " + file + ": " + e);
}
}
}
public List<int[]> gatherTreeSpans(File file, String content) throws IOException {
JCCompilationUnit unit = read(file.toURI(), content);
List<int[]> spans = new ArrayList<>();
new TreePathScanner<Void, Void>() {
@Override
public Void scan(Tree tree, Void p) {
if (tree != null) {
int start = ((JCTree) tree).getStartPosition();
int end = ((JCTree) tree).getEndPosition(unit.endPositions);
spans.add(new int[] {start, end});
}
return super.scan(tree, p);
}
}.scan(unit, null);
return spans;
}
public void verifyTreeSpans(File file, List<int[]> spans,
String updatedContent, int semicolon) throws IOException {
JCCompilationUnit updated = read(file.toURI(), updatedContent);
Iterator<int[]> nextSpan = spans.iterator();
new TreePathScanner<Void, Void>() {
@Override
public Void scan(Tree tree, Void p) {
if (tree != null) {
int start = ((JCTree) tree).getStartPosition();
int end = ((JCTree) tree).getEndPosition(updated.endPositions);
if (tree.getKind() != Kind.ERRONEOUS) {
int[] expected = nextSpan.next();
int expectedEnd = expected[1];
if (expectedEnd == semicolon + 1) {
Scanner scanner = scannerFactory.newScanner(updatedContent, true);
scanner.nextToken();
while (scanner.token().pos < expectedEnd)
scanner.nextToken();
expectedEnd = scanner.token().pos;
}
if (expected[0] != start || expectedEnd != end) {
error(updatedContent + "; semicolon: " + semicolon + "; expected: " +
expected[0] + "-" + expectedEnd + "; found=" + start + "-" + end +
";" + tree);
}
}
}
return super.scan(tree, p);
}
}.scan(updated, null);
}
DiagnosticListener<JavaFileObject> devNull = (d) -> {};
JavacTool tool = JavacTool.create();
StandardJavaFileManager fm = tool.getStandardFileManager(devNull, null, null);
ScannerFactory scannerFactory = ScannerFactory.instance(new Context());
/**
* Read a file.
* @param file the file to be read
* @return the tree for the content of the file
* @throws IOException if any IO errors occur
* @throws MissingSemicolonTest.ParseException if any errors occur while parsing the file
*/
JCCompilationUnit read(URI uri, String content) throws IOException {
JavacTool tool = JavacTool.create();
JavacTask task = tool.getTask(null, fm, devNull, Collections.<String>emptyList(), null,
Arrays.<JavaFileObject>asList(new JavaSource(uri, content)));
Iterable<? extends CompilationUnitTree> trees = task.parse();
Iterator<? extends CompilationUnitTree> iter = trees.iterator();
if (!iter.hasNext())
throw new Error("no trees found");
JCCompilationUnit t = (JCCompilationUnit) iter.next();
if (iter.hasNext())
throw new Error("too many trees found");
return t;
}
class JavaSource extends SimpleJavaFileObject {
private final String content;
public JavaSource(URI uri, String content) {
super(uri, JavaFileObject.Kind.SOURCE);
this.content = content;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return content;
}
}
/**
* Report an error. When the program is complete, the program will either
* exit or throw an Error if any errors have been reported.
* @param msg the error message
*/
void error(String msg) {
System.err.println(msg);
errors++;
}
/** Number of files that have been analyzed. */
int fileCount;
/** Number of errors reported. */
int errors;
}
class TestCase {
String str1;
String str2;
public TestCase() {
super();
super.hashCode();
}
public TestCase(String str1, String str2) {
super();
this.str1 = str1;
this.str2 = str2;
assert true;
}
void newClass() {
new String();
new String();
}
void localVars() {
String str1 = "";
String str2;
String str3;
final String str4;
}
void throwsException() {
throw new IllegalStateException();
}
int returnWithExpression() {
return 1;
}
void returnWithoutExpression() {
return ;
}
void doWhileBreakContinue() {
do {
if (true)
break;
if (false)
continue;
} while(true);
}
void labelled() {
LABEL: doWhileBreakContinue();
}
}