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test/tools/javac/tree/TreePosRoundsTest.java@93012e2a5d1d (annotated)

test/tools/javac/tree/TreePosRoundsTest.java

Sat, 07 Nov 2020 10:30:02 +0800

author

aoqi

date

Sat, 07 Nov 2020 10:30:02 +0800

changeset 3938

93012e2a5d1d

parent 2525

2eb010b6cb22

permissions

-rw-r--r--

Added tag mips-jdk8u275-b01 for changeset eb6ee6a5f2fe

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 6985205 6986246
aoqi@0	27	* @summary access to tree positions and doc comments may be lost across annotation processing rounds
aoqi@0	28	* @build TreePosRoundsTest
aoqi@0	29	* @compile -proc:only -processor TreePosRoundsTest TreePosRoundsTest.java
aoqi@0	30	* @run main TreePosRoundsTest
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import java.io.*;
aoqi@0	34	import java.util.*;
aoqi@0	35	import javax.annotation.processing.*;
aoqi@0	36	import javax.lang.model.*;
aoqi@0	37	import javax.lang.model.element.*;
aoqi@0	38	import javax.tools.*;
aoqi@0	39
aoqi@0	40	import com.sun.source.tree.*;
aoqi@0	41	import com.sun.source.util.*;
aoqi@0	42	import javax.tools.JavaCompiler.CompilationTask;
aoqi@0	43
aoqi@0	44	// This test is an annotation processor that performs multiple rounds of
aoqi@0	45	// processing, and on each round, it checks that source positions are
aoqi@0	46	// available and correct.
aoqi@0	47	//
aoqi@0	48	// The test can be run directly as a processor from the javac command line
aoqi@0	49	// or via JSR 199 by invoking the main program.
aoqi@0	50
aoqi@0	51	@SupportedAnnotationTypes("*")
aoqi@0	52	public class TreePosRoundsTest extends AbstractProcessor {
aoqi@0	53	public static void main(String... args) throws Exception {
aoqi@0	54	String testSrc = System.getProperty("test.src");
aoqi@0	55	String testClasses = System.getProperty("test.classes");
aoqi@0	56	JavaCompiler c = ToolProvider.getSystemJavaCompiler();
aoqi@0	57	StandardJavaFileManager fm = c.getStandardFileManager(null, null, null);
aoqi@0	58	String thisName = TreePosRoundsTest.class.getName();
aoqi@0	59	File thisFile = new File(testSrc, thisName + ".java");
aoqi@0	60	Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(thisFile);
aoqi@0	61	List<String> options = Arrays.asList(
aoqi@0	62	"-proc:only",
aoqi@0	63	"-processor", thisName,
aoqi@0	64	"-processorpath", testClasses);
aoqi@0	65	CompilationTask t = c.getTask(null, fm, null, options, null, files);
aoqi@0	66	boolean ok = t.call();
aoqi@0	67	if (!ok)
aoqi@0	68	throw new Exception("processing failed");
aoqi@0	69	}
aoqi@0	70
aoqi@0	71	Filer filer;
aoqi@0	72	Messager messager;
aoqi@0	73	Trees trees;
aoqi@0	74
aoqi@0	75	@Override
aoqi@0	76	public SourceVersion getSupportedSourceVersion() {
aoqi@0	77	return SourceVersion.latest();
aoqi@0	78	}
aoqi@0	79
aoqi@0	80	@Override
aoqi@0	81	public void init(ProcessingEnvironment pEnv) {
aoqi@0	82	super.init(pEnv);
aoqi@0	83	filer = pEnv.getFiler();
aoqi@0	84	messager = pEnv.getMessager();
aoqi@0	85	trees = Trees.instance(pEnv);
aoqi@0	86	}
aoqi@0	87
aoqi@0	88	int round = 0;
aoqi@0	89
aoqi@0	90	@Override
aoqi@0	91	public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
aoqi@0	92	round++;
aoqi@0	93
aoqi@0	94	// Scan trees for elements, verifying source tree positions
aoqi@0	95	for (Element e: roundEnv.getRootElements()) {
aoqi@0	96	try {
aoqi@0	97	TreePath p = trees.getPath(e);
aoqi@0	98	new TestTreeScanner(p.getCompilationUnit(), trees).scan(trees.getPath(e), null);
aoqi@0	99	} catch (IOException ex) {
aoqi@0	100	messager.printMessage(Diagnostic.Kind.ERROR,
aoqi@0	101	"Cannot get source: " + ex, e);
aoqi@0	102	}
aoqi@0	103	}
aoqi@0	104
aoqi@0	105	final int MAXROUNDS = 3;
aoqi@0	106	if (round < MAXROUNDS)
aoqi@0	107	generateSource("Gen" + round);
aoqi@0	108
aoqi@0	109	return true;
aoqi@0	110	}
aoqi@0	111
aoqi@0	112	void generateSource(String name) {
aoqi@0	113	StringBuilder text = new StringBuilder();
aoqi@0	114	text.append("class ").append(name).append("{\n");
aoqi@0	115	text.append(" int one = 1;\n");
aoqi@0	116	text.append(" int two = 2;\n");
aoqi@0	117	text.append(" int three = one + two;\n");
aoqi@0	118	text.append("}\n");
aoqi@0	119
aoqi@0	120	try {
aoqi@0	121	JavaFileObject fo = filer.createSourceFile(name);
aoqi@0	122	Writer out = fo.openWriter();
aoqi@0	123	try {
aoqi@0	124	out.write(text.toString());
aoqi@0	125	} finally {
aoqi@0	126	out.close();
aoqi@0	127	}
aoqi@0	128	} catch (IOException e) {
aoqi@0	129	throw new Error(e);
aoqi@0	130	}
aoqi@0	131	}
aoqi@0	132
aoqi@0	133	class TestTreeScanner extends TreePathScanner<Void,Void> {
aoqi@0	134	TestTreeScanner(CompilationUnitTree unit, Trees trees) throws IOException {
aoqi@0	135	this.unit = unit;
aoqi@0	136	JavaFileObject sf = unit.getSourceFile();
aoqi@0	137	source = sf.getCharContent(true).toString();
aoqi@0	138	sourcePositions = trees.getSourcePositions();
aoqi@0	139	}
aoqi@0	140
aoqi@0	141	@Override
aoqi@0	142	public Void visitVariable(VariableTree tree, Void _) {
aoqi@0	143	check(getCurrentPath());
aoqi@0	144	return super.visitVariable(tree, _);
aoqi@0	145	}
aoqi@0	146
aoqi@0	147	void check(TreePath tp) {
aoqi@0	148	Tree tree = tp.getLeaf();
aoqi@0	149
aoqi@0	150	String expect = tree.toString();
aoqi@0	151	if (tree.getKind() == Tree.Kind.VARIABLE) {
aoqi@0	152	// tree.toString() does not know enough context to add ";",
aoqi@0	153	// so deal with that manually...
aoqi@0	154	Tree.Kind enclKind = tp.getParentPath().getLeaf().getKind();
aoqi@0	155	//System.err.println(" encl: " +enclKind);
aoqi@0	156	if (enclKind == Tree.Kind.CLASS || enclKind == Tree.Kind.BLOCK)
aoqi@0	157	expect += ";";
aoqi@0	158	}
aoqi@0	159	//System.err.println("expect: " + expect);
aoqi@0	160
aoqi@0	161	int start = (int)sourcePositions.getStartPosition(unit, tree);
aoqi@0	162	if (start == Diagnostic.NOPOS) {
aoqi@0	163	messager.printMessage(Diagnostic.Kind.ERROR, "start pos not set for " + trim(tree));
aoqi@0	164	return;
aoqi@0	165	}
aoqi@0	166
aoqi@0	167	int end = (int)sourcePositions.getEndPosition(unit, tree);
aoqi@0	168	if (end == Diagnostic.NOPOS) {
aoqi@0	169	messager.printMessage(Diagnostic.Kind.ERROR, "end pos not set for " + trim(tree));
aoqi@0	170	return;
aoqi@0	171	}
aoqi@0	172
aoqi@0	173	String found = source.substring(start, end);
aoqi@0	174	//System.err.println(" found: " + found);
aoqi@0	175
aoqi@0	176	// allow for long lines, in which case just compare beginning and
aoqi@0	177	// end of the strings
aoqi@0	178	boolean equal;
aoqi@0	179	if (found.contains("\n")) {
aoqi@0	180	String head = found.substring(0, found.indexOf("\n"));
aoqi@0	181	String tail = found.substring(found.lastIndexOf("\n")).trim();
aoqi@0	182	equal = expect.startsWith(head) && expect.endsWith(tail);
aoqi@0	183	} else {
aoqi@0	184	equal = expect.equals(found);
aoqi@0	185	}
aoqi@0	186
aoqi@0	187	if (!equal) {
aoqi@0	188	messager.printMessage(Diagnostic.Kind.ERROR,
aoqi@0	189	"unexpected value found: '" + found + "'; expected: '" + expect + "'");
aoqi@0	190	}
aoqi@0	191	}
aoqi@0	192
aoqi@0	193	String trim(Tree tree) {
aoqi@0	194	final int MAXLEN = 32;
aoqi@0	195	String s = tree.toString().replaceAll("\\s+", " ").trim();
aoqi@0	196	return (s.length() < MAXLEN) ? s : s.substring(0, MAXLEN);
aoqi@0	197
aoqi@0	198	}
aoqi@0	199
aoqi@0	200	CompilationUnitTree unit;
aoqi@0	201	SourcePositions sourcePositions;
aoqi@0	202	String source;
aoqi@0	203	}
aoqi@0	204
aoqi@0	205	}