author | jlahoda |
Tue, 02 Apr 2019 16:51:25 +0200 | |
branch | jlahoda-tree-builder |
changeset 57300 | c79e191854e4 |
parent 57298 | 72d5f7163f12 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
97aaf02ed830
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 9999999 |
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* @summary XXX |
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* @library /tools/lib |
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* @modules |
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* jdk.compiler/com.sun.tools.javac.api |
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* jdk.compiler/com.sun.tools.javac.main |
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* @build toolbox.ToolBox CodeBuilder |
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* @run main ASTBuilder |
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*/ |
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|
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import java.net.URI; |
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import java.util.Arrays; |
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import java.util.EnumSet; |
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import java.util.function.Consumer; |
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import javax.lang.model.element.Modifier; |
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import javax.tools.JavaCompiler; |
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import javax.tools.JavaFileObject; |
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import javax.tools.SimpleJavaFileObject; |
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import javax.tools.ToolProvider; |
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import com.sun.source.tree.CompilationUnitTree; |
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import com.sun.source.tree.Tree; |
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import com.sun.source.util.JavacTask; |
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import com.sun.source.util.TreeBuilder; |
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import com.sun.source.util.TreeBuilder.*; |
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import com.sun.source.util.Trees; |
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import com.sun.source.util.TreeScanner; |
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import javax.tools.StandardLocation; |
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|
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import com.sun.source.tree.ClassTree; |
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import com.sun.source.tree.IdentifierTree; |
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import com.sun.source.tree.MemberReferenceTree; |
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import com.sun.source.tree.MemberSelectTree; |
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import com.sun.source.tree.MethodTree; |
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import com.sun.source.tree.ModifiersTree; |
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import com.sun.source.tree.VariableTree; |
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import toolbox.ToolBox.MemoryFileManager; |
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public class ASTBuilder { |
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public static void main(String[] args) throws Exception { |
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runTest("public class Test {" + |
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" public static volatile int x;" + |
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"}", |
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U -> U._class("Test", |
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C -> C.modifiers(M -> M.modifier(Modifier.PUBLIC)) |
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.field("x", |
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Type::_int, |
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F -> F.modifiers(M -> M.modifier(Modifier.PUBLIC) |
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.modifier(Modifier.STATIC) |
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.modifier(Modifier.VOLATILE) |
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) |
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) |
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) |
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); |
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runTest("class Test extends Exception implements java.util.List<Map<String, String>>, CharSequence {" + |
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" int x1 = 2;" + |
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" int x2 = 2 + x1;" + |
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" int test(int param) {" + |
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" if (param == 0) return 0;" + |
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" else return 1;" + |
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" }" + |
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" int test2(int param) {" + |
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" if (param == 0) return 0;" + |
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" return 1;" + |
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" }" + |
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"}"); |
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runTest("class Test extends java.util.Map<List<String>, Numer> {" + |
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"}", |
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U -> U._class("Test", C -> C.superclass("java.util.Map<List<String>, Numer>"))); |
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runTest("class Test {" + |
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" int i = true ? 0 : 1;" + |
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"}", |
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U -> U._class("Test", C -> C.field("i", Type::_int, F -> F.init("true ? 0 : 1")))); |
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runTest("class Test {" + |
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" int test(int param) {" + |
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" if (param == 0) return 0;" + |
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" else return 1;" + |
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" }" + |
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"}", |
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U -> U._class("Test", C -> C.method("test", Type::_int, M -> M.parameter(Type::_int, P -> P.name("param")).body("{\n" + |
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" if (param == 0) return 0;\n" + |
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" else return 1;\n" + |
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" }")))); |
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try { |
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runTest("broken", |
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U -> U._class("Test", C -> C.superclass("java.util.Map<"))); |
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throw new AssertionError("The exceptec exception was not thrown."); |
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} catch (IllegalArgumentException ex) { |
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//OK |
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} |
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} |
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private static void runTest(String expectedCode, Consumer<CompilationUnit> actualBuilder) throws Exception { |
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
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assert tool != null; |
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JavacTask expectedTask = (JavacTask) tool.getTask(null, null, null, |
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null, null, Arrays.asList(new MyFileObject(expectedCode))); |
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String expectedDump = dumpTree(expectedTask.parse().iterator().next()); |
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|
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JavacTask ct = (JavacTask) tool.getTask(null, null, null, |
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null, null, Arrays.asList(new MyFileObject(""))); |
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ct.parse(); //init javac |
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Trees t = Trees.instance(ct); |
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|
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TreeBuilder builder = t.getTreeBuilder(); |
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CompilationUnitTree cut = builder.createCompilationUnitTree(actualBuilder); |
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String actualDump = dumpTree(cut); |
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if (!actualDump.equals(expectedDump)) { |
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throw new AssertionError("Expected and actual dump differ. Expected: " + expectedDump + "; actual: " + actualDump); |
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} |
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} |
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private static void runTest(String expectedCode) throws Exception { |
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final JavaCompiler tool = ToolProvider.getSystemJavaCompiler(); |
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assert tool != null; |
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|
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JavacTask expectedTask = (JavacTask) tool.getTask(null, null, null, |
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null, null, Arrays.asList(new MyFileObject(expectedCode))); |
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CompilationUnitTree expectedCUT = expectedTask.parse().iterator().next(); |
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String builderCode = CodeBuilder.buildCodeToGenerate(expectedCUT, "builder"); |
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System.err.println("builderCode:"); |
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System.err.println(builderCode); |
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String expectedCodeGen = "import com.sun.source.tree.*; import com.sun.source.util.*; public class CodeGen { public static CompilationUnitTree build(TreeBuilder builder) { return " + builderCode + "; } }"; |
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String expectedDump = dumpTree(expectedCUT); |
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157 |
|
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try (MemoryFileManager mfm = new MemoryFileManager(tool.getStandardFileManager(null, null, null))) { |
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Boolean res = tool.getTask(null, mfm, null, |
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null, null, Arrays.asList(new MyFileObject(expectedCodeGen))) |
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.call(); |
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162 |
if (!res) { |
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throw new IllegalStateException("Could not compile the generated code!"); |
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} |
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165 |
|
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166 |
ClassLoader codeCL = new ClassLoader(ASTBuilder.class.getClassLoader()) { |
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167 |
@Override |
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168 |
protected java.lang.Class<?> findClass(String name) throws ClassNotFoundException { |
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byte[] bytecode = mfm.getFileBytes(StandardLocation.CLASS_OUTPUT, name); |
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if (bytecode != null) { |
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return defineClass(name, bytecode, 0, bytecode.length); |
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} |
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return super.findClass(name); |
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174 |
} |
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175 |
}; |
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176 |
|
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JavacTask ct = (JavacTask) tool.getTask(null, null, null, |
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null, null, Arrays.asList(new MyFileObject(""))); |
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ct.parse(); //init javac |
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Trees t = Trees.instance(ct); |
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181 |
|
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TreeBuilder builder = t.getTreeBuilder(); |
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183 |
|
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184 |
java.lang.Class<?> codeGen = codeCL.loadClass("CodeGen"); |
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CompilationUnitTree cut = (CompilationUnitTree) codeGen.getDeclaredMethod("build", TreeBuilder.class).invoke(null, builder); |
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186 |
String actualDump = dumpTree(cut); |
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187 |
|
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188 |
if (!actualDump.equals(expectedDump)) { |
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189 |
throw new AssertionError("Expected and actual dump differ. Expected: " + expectedDump + "; actual: " + actualDump); |
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} |
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191 |
} |
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192 |
} |
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193 |
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static String dumpTree(Tree t) { |
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StringBuilder result = new StringBuilder(); |
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new TreeScanner<Void, Void>() { |
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String sep = ""; |
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198 |
@Override |
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public Void scan(Tree tree, Void p) { |
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result.append(sep); |
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201 |
sep = " "; |
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202 |
if (tree == null) { |
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result.append("null"); |
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204 |
return null; |
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205 |
} |
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result.append("("); |
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207 |
result.append(tree.getKind().name()); |
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208 |
super.scan(tree, p); |
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|
209 |
result.append(")"); |
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|
210 |
return null; |
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|
211 |
} |
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|
212 |
@Override |
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213 |
public Void scan(Iterable<? extends Tree> nodes, Void p) { |
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214 |
result.append(sep); |
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|
215 |
sep = " "; |
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|
216 |
if (nodes == null) { |
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|
217 |
result.append("null"); |
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|
218 |
return null; |
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|
219 |
} |
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|
220 |
result.append("("); |
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|
221 |
super.scan(nodes, p); |
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|
222 |
result.append(")"); |
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|
223 |
return null; |
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224 |
} |
57295
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225 |
@Override |
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226 |
public Void visitIdentifier(IdentifierTree node, Void p) { |
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227 |
result.append(node.getName()); |
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228 |
return super.visitIdentifier(node, p); |
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229 |
} |
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|
230 |
@Override |
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|
231 |
public Void visitMemberSelect(MemberSelectTree node, Void p) { |
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|
232 |
result.append(node.getIdentifier()); |
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233 |
return super.visitMemberSelect(node, p); |
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234 |
} |
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|
235 |
@Override |
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|
236 |
public Void visitMemberReference(MemberReferenceTree node, Void p) { |
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|
237 |
result.append(node.getName()); |
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|
238 |
return super.visitMemberReference(node, p); |
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|
239 |
} |
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|
240 |
@Override |
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|
241 |
public Void visitClass(ClassTree node, Void p) { |
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|
242 |
result.append(node.getSimpleName()); |
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|
243 |
return super.visitClass(node, p); |
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244 |
} |
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|
245 |
@Override |
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|
246 |
public Void visitMethod(MethodTree node, Void p) { |
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|
247 |
result.append(node.getName()); |
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248 |
return super.visitMethod(node, p); |
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|
249 |
} |
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|
250 |
@Override |
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|
251 |
public Void visitVariable(VariableTree node, Void p) { |
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252 |
result.append(node.getName()); |
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|
253 |
return super.visitVariable(node, p); |
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|
254 |
} |
57300 | 255 |
@Override |
256 |
public Void visitModifiers(ModifiersTree node, Void p) { |
|
257 |
result.append(node.getFlags()); |
|
258 |
return super.visitModifiers(node, p); |
|
259 |
} |
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260 |
}.scan(t, null); |
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|
261 |
return result.toString(); |
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A first very crude experiment on a tree builder for javac.
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|
262 |
} |
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A first very crude experiment on a tree builder for javac.
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|
263 |
|
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A first very crude experiment on a tree builder for javac.
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|
264 |
static class MyFileObject extends SimpleJavaFileObject { |
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A first very crude experiment on a tree builder for javac.
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|
265 |
private String text; |
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|
266 |
|
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public MyFileObject(String text) { |
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super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); |
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|
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this.text = text; |
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|
270 |
} |
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|
271 |
|
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|
272 |
@Override |
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|
273 |
public CharSequence getCharContent(boolean ignoreEncodingErrors) { |
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|
274 |
return text; |
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|
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} |
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@Override |
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public boolean isNameCompatible(String simpleName, Kind kind) { |
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return true; |
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} |
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} |
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} |