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test/tools/javac/processing/model/element/TestResourceVariable.java@2eb010b6cb22 (annotated)

test/tools/javac/processing/model/element/TestResourceVariable.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 1466

b52a38d4536c

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, 2011, 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 6911256 6964740 6967842 6961571 7025809
aoqi@0	27	* @summary Test that the resource variable kind is appropriately set
aoqi@0	28	* @author Joseph D. Darcy
aoqi@0	29	* @library /tools/javac/lib
aoqi@0	30	* @build JavacTestingAbstractProcessor TestResourceVariable
aoqi@0	31	* @compile -processor TestResourceVariable -proc:only TestResourceVariable.java
aoqi@0	32	*/
aoqi@0	33
aoqi@0	34	import java.io.*;
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.lang.model.type.*;
aoqi@0	39	import javax.lang.model.util.*;
aoqi@0	40	import java.util.*;
aoqi@0	41	import com.sun.source.tree.*;
aoqi@0	42	import com.sun.source.util.*;
aoqi@0	43	import static javax.tools.Diagnostic.Kind.*;
aoqi@0	44
aoqi@0	45	/**
aoqi@0	46	* Using the tree API, retrieve element representations of the
aoqi@0	47	* resource of a try-with-resources statement and verify their kind
aoqi@0	48	* tags are set appropriately.
aoqi@0	49	*/
aoqi@0	50	public class TestResourceVariable extends JavacTestingAbstractProcessor implements AutoCloseable {
aoqi@0	51	int resourceVariableCount = 0;
aoqi@0	52
aoqi@0	53	public boolean process(Set<? extends TypeElement> annotations,
aoqi@0	54	RoundEnvironment roundEnv) {
aoqi@0	55	if (!roundEnv.processingOver()) {
aoqi@0	56	Trees trees = Trees.instance(processingEnv);
aoqi@0	57
aoqi@0	58	for(Element rootElement : roundEnv.getRootElements()) {
aoqi@0	59	TreePath treePath = trees.getPath(rootElement);
aoqi@0	60
aoqi@0	61	(new ResourceVariableScanner(trees)).
aoqi@0	62	scan(trees.getTree(rootElement),
aoqi@0	63	treePath.getCompilationUnit());
aoqi@0	64	}
aoqi@0	65	if (resourceVariableCount != 3)
aoqi@0	66	throw new RuntimeException("Bad resource variable count " +
aoqi@0	67	resourceVariableCount);
aoqi@0	68	}
aoqi@0	69	return true;
aoqi@0	70	}
aoqi@0	71
aoqi@0	72	@Override
aoqi@0	73	public void close() {}
aoqi@0	74
aoqi@0	75	private void test1() {
aoqi@0	76	try(TestResourceVariable trv = this) {}
aoqi@0	77	}
aoqi@0	78
aoqi@0	79	private void test2() {
aoqi@0	80	try(TestResourceVariable trv1 = this; TestResourceVariable trv2 = trv1) {}
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	/**
aoqi@0	84	* Verify that a resource variable modeled as an element behaves
aoqi@0	85	* as expected under 6 and latest specific visitors.
aoqi@0	86	*/
aoqi@0	87	private static void testResourceVariable(Element element) {
aoqi@0	88	ElementVisitor visitor6 = new ElementKindVisitor6<Void, Void>() {};
aoqi@0	89
aoqi@0	90	try {
aoqi@0	91	visitor6.visit(element);
aoqi@0	92	throw new RuntimeException("Expected UnknownElementException not thrown.");
aoqi@0	93	} catch (UnknownElementException uee) {
aoqi@0	94	; // Expected.
aoqi@0	95	}
aoqi@0	96
aoqi@0	97	ElementKindVisitor visitorLatest =
aoqi@0	98	new ElementKindVisitor<Object, Void>() {
aoqi@0	99	@Override
aoqi@0	100	public Object visitVariableAsResourceVariable(VariableElement e,
aoqi@0	101	Void p) {
aoqi@0	102	return e; // a non-null value
aoqi@0	103	}
aoqi@0	104	};
aoqi@0	105
aoqi@0	106	if (visitorLatest.visit(element) == null) {
aoqi@0	107	throw new RuntimeException("Null result of resource variable visitation.");
aoqi@0	108	}
aoqi@0	109	}
aoqi@0	110
aoqi@0	111	class ResourceVariableScanner extends TreeScanner<Void, CompilationUnitTree> {
aoqi@0	112	private Trees trees;
aoqi@0	113
aoqi@0	114	public ResourceVariableScanner(Trees trees) {
aoqi@0	115	super();
aoqi@0	116	this.trees = trees;
aoqi@0	117	}
aoqi@0	118	@Override
aoqi@0	119	public Void visitVariable(VariableTree node, CompilationUnitTree cu) {
aoqi@0	120	Element element = trees.getElement(trees.getPath(cu, node));
aoqi@0	121
aoqi@0	122	System.out.println("Name: " + element.getSimpleName() +
aoqi@0	123	"\tKind: " + element.getKind());
aoqi@0	124	if (element.getKind() == ElementKind.RESOURCE_VARIABLE) {
aoqi@0	125	testResourceVariable(element);
aoqi@0	126	resourceVariableCount++;
aoqi@0	127	}
aoqi@0	128	return super.visitVariable(node, cu);
aoqi@0	129	}
aoqi@0	130	}
aoqi@0	131	}