author | jjg |
Thu, 10 Jun 2010 16:08:01 -0700 | |
changeset 5847 | 1908176fd6e3 |
parent 5841 | 7a8448425bb7 |
child 7681 | 1f0819a3341f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2009, 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. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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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 |
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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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package com.sun.tools.javac.processing; |
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import javax.annotation.processing.*; |
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import javax.lang.model.*; |
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import javax.lang.model.element.*; |
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import static javax.lang.model.element.ElementKind.*; |
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import static javax.lang.model.element.NestingKind.*; |
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import javax.lang.model.type.*; |
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import javax.lang.model.util.*; |
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import java.io.PrintWriter; |
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import java.io.Writer; |
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import java.util.*; |
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/** |
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* A processor which prints out elements. Used to implement the |
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* -Xprint option; the included visitor class is used to implement |
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* Elements.printElements. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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@SupportedAnnotationTypes("*") |
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// TODO: Change to version 7 based visitors when available |
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@SupportedSourceVersion(SourceVersion.RELEASE_7) |
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public class PrintingProcessor extends AbstractProcessor { |
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PrintWriter writer; |
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56 |
public PrintingProcessor() { |
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super(); |
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writer = new PrintWriter(System.out); |
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} |
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public void setWriter(Writer w) { |
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writer = new PrintWriter(w); |
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} |
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@Override |
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public boolean process(Set<? extends TypeElement> tes, |
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RoundEnvironment renv) { |
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for(Element element : renv.getRootElements()) { |
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print(element); |
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} |
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// Just print the elements, nothing more to do. |
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return true; |
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} |
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void print(Element element) { |
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new PrintingElementVisitor(writer, processingEnv.getElementUtils()). |
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visit(element).flush(); |
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} |
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/** |
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* Used for the -Xprint option and called by Elements.printElements |
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*/ |
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public static class PrintingElementVisitor |
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extends SimpleElementVisitor7<PrintingElementVisitor, Boolean> { |
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int indentation; // Indentation level; |
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final PrintWriter writer; |
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final Elements elementUtils; |
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public PrintingElementVisitor(Writer w, Elements elementUtils) { |
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super(); |
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this.writer = new PrintWriter(w); |
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this.elementUtils = elementUtils; |
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indentation = 0; |
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} |
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@Override |
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protected PrintingElementVisitor defaultAction(Element e, Boolean newLine) { |
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if (newLine != null && newLine) |
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writer.println(); |
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printDocComment(e); |
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printModifiers(e); |
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return this; |
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} |
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@Override |
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public PrintingElementVisitor visitExecutable(ExecutableElement e, Boolean p) { |
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ElementKind kind = e.getKind(); |
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if (kind != STATIC_INIT && |
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kind != INSTANCE_INIT) { |
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Element enclosing = e.getEnclosingElement(); |
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// Don't print out the constructor of an anonymous class |
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if (kind == CONSTRUCTOR && |
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enclosing != null && |
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NestingKind.ANONYMOUS == |
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// Use an anonymous class to determine anonymity! |
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(new SimpleElementVisitor7<NestingKind, Void>() { |
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@Override |
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public NestingKind visitType(TypeElement e, Void p) { |
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return e.getNestingKind(); |
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} |
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}).visit(enclosing)) |
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return this; |
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defaultAction(e, true); |
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printFormalTypeParameters(e, true); |
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switch(kind) { |
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case CONSTRUCTOR: |
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// Print out simple name of the class |
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writer.print(e.getEnclosingElement().getSimpleName()); |
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break; |
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case METHOD: |
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writer.print(e.getReturnType().toString()); |
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writer.print(" "); |
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writer.print(e.getSimpleName().toString()); |
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break; |
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} |
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writer.print("("); |
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printParameters(e); |
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writer.print(")"); |
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AnnotationValue defaultValue = e.getDefaultValue(); |
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if (defaultValue != null) |
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writer.print(" default " + defaultValue); |
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printThrows(e); |
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writer.println(";"); |
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} |
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return this; |
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} |
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@Override |
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public PrintingElementVisitor visitType(TypeElement e, Boolean p) { |
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ElementKind kind = e.getKind(); |
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NestingKind nestingKind = e.getNestingKind(); |
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if (NestingKind.ANONYMOUS == nestingKind) { |
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// Print out an anonymous class in the style of a |
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// class instance creation expression rather than a |
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// class declaration. |
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writer.print("new "); |
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// If the anonymous class implements an interface |
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// print that name, otherwise print the superclass. |
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List<? extends TypeMirror> interfaces = e.getInterfaces(); |
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if (!interfaces.isEmpty()) |
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writer.print(interfaces.get(0)); |
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else |
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writer.print(e.getSuperclass()); |
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writer.print("("); |
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// Anonymous classes that implement an interface can't |
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// have any constructor arguments. |
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if (interfaces.isEmpty()) { |
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// Print out the parameter list from the sole |
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// constructor. For now, don't try to elide any |
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// synthetic parameters by determining if the |
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// anonymous class is in a static context, etc. |
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List<? extends ExecutableElement> constructors = |
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ElementFilter.constructorsIn(e.getEnclosedElements()); |
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if (!constructors.isEmpty()) |
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printParameters(constructors.get(0)); |
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} |
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writer.print(")"); |
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} else { |
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if (nestingKind == TOP_LEVEL) { |
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PackageElement pkg = elementUtils.getPackageOf(e); |
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if (!pkg.isUnnamed()) |
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writer.print("package " + pkg.getQualifiedName() + ";\n"); |
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} |
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defaultAction(e, true); |
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switch(kind) { |
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case ANNOTATION_TYPE: |
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writer.print("@interface"); |
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break; |
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default: |
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writer.print(kind.toString().toLowerCase()); |
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} |
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writer.print(" "); |
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writer.print(e.getSimpleName()); |
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printFormalTypeParameters(e, false); |
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// Print superclass information if informative |
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if (kind == CLASS) { |
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TypeMirror supertype = e.getSuperclass(); |
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if (supertype.getKind() != TypeKind.NONE) { |
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TypeElement e2 = (TypeElement) |
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((DeclaredType) supertype).asElement(); |
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if (e2.getSuperclass().getKind() != TypeKind.NONE) |
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writer.print(" extends " + supertype); |
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} |
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} |
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printInterfaces(e); |
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} |
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writer.println(" {"); |
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indentation++; |
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if (kind == ENUM) { |
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List<Element> enclosedElements = |
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new ArrayList<Element>(e.getEnclosedElements()); |
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// Handle any enum constants specially before other entities. |
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List<Element> enumConstants = new ArrayList<Element>(); |
234 |
for(Element element : enclosedElements) { |
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if (element.getKind() == ENUM_CONSTANT) |
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enumConstants.add(element); |
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} |
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if (!enumConstants.isEmpty()) { |
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int i; |
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for(i = 0; i < enumConstants.size()-1; i++) { |
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this.visit(enumConstants.get(i), true); |
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writer.print(","); |
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} |
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this.visit(enumConstants.get(i), true); |
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writer.println(";\n"); |
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enclosedElements.removeAll(enumConstants); |
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} |
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250 |
for(Element element : enclosedElements) |
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this.visit(element); |
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} else { |
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for(Element element : e.getEnclosedElements()) |
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254 |
this.visit(element); |
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} |
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257 |
indentation--; |
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indent(); |
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writer.println("}"); |
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return this; |
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} |
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263 |
@Override |
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264 |
public PrintingElementVisitor visitVariable(VariableElement e, Boolean newLine) { |
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265 |
ElementKind kind = e.getKind(); |
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266 |
defaultAction(e, newLine); |
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267 |
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268 |
if (kind == ENUM_CONSTANT) |
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269 |
writer.print(e.getSimpleName()); |
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270 |
else { |
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271 |
writer.print(e.asType().toString() + " " + e.getSimpleName() ); |
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272 |
Object constantValue = e.getConstantValue(); |
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273 |
if (constantValue != null) { |
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274 |
writer.print(" = "); |
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writer.print(elementUtils.getConstantExpression(constantValue)); |
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276 |
} |
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writer.println(";"); |
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278 |
} |
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279 |
return this; |
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280 |
} |
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281 |
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282 |
@Override |
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283 |
public PrintingElementVisitor visitTypeParameter(TypeParameterElement e, Boolean p) { |
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284 |
writer.print(e.getSimpleName()); |
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return this; |
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286 |
} |
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287 |
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288 |
// Should we do more here? |
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289 |
@Override |
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290 |
public PrintingElementVisitor visitPackage(PackageElement e, Boolean p) { |
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291 |
defaultAction(e, false); |
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292 |
if (!e.isUnnamed()) |
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293 |
writer.println("package " + e.getQualifiedName() + ";"); |
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294 |
else |
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295 |
writer.println("// Unnamed package"); |
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296 |
return this; |
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297 |
} |
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298 |
||
299 |
public void flush() { |
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300 |
writer.flush(); |
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301 |
} |
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302 |
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303 |
private void printDocComment(Element e) { |
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304 |
String docComment = elementUtils.getDocComment(e); |
|
305 |
||
306 |
if (docComment != null) { |
|
307 |
// Break comment into lines |
|
308 |
java.util.StringTokenizer st = new StringTokenizer(docComment, |
|
309 |
"\n\r"); |
|
310 |
indent(); |
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311 |
writer.println("/**"); |
|
312 |
||
313 |
while(st.hasMoreTokens()) { |
|
314 |
indent(); |
|
315 |
writer.print(" *"); |
|
316 |
writer.println(st.nextToken()); |
|
317 |
} |
|
318 |
||
319 |
indent(); |
|
320 |
writer.println(" */"); |
|
321 |
} |
|
322 |
} |
|
323 |
||
324 |
private void printModifiers(Element e) { |
|
325 |
ElementKind kind = e.getKind(); |
|
326 |
if (kind == PARAMETER) { |
|
327 |
printAnnotationsInline(e); |
|
328 |
} else { |
|
329 |
printAnnotations(e); |
|
330 |
indent(); |
|
331 |
} |
|
332 |
||
333 |
if (kind == ENUM_CONSTANT) |
|
334 |
return; |
|
335 |
||
336 |
Set<Modifier> modifiers = new LinkedHashSet<Modifier>(); |
|
337 |
modifiers.addAll(e.getModifiers()); |
|
338 |
||
339 |
switch (kind) { |
|
340 |
case ANNOTATION_TYPE: |
|
341 |
case INTERFACE: |
|
342 |
modifiers.remove(Modifier.ABSTRACT); |
|
343 |
break; |
|
344 |
||
345 |
case ENUM: |
|
346 |
modifiers.remove(Modifier.FINAL); |
|
347 |
modifiers.remove(Modifier.ABSTRACT); |
|
348 |
break; |
|
349 |
||
350 |
case METHOD: |
|
351 |
case FIELD: |
|
352 |
Element enclosingElement = e.getEnclosingElement(); |
|
353 |
if (enclosingElement != null && |
|
354 |
enclosingElement.getKind().isInterface()) { |
|
355 |
modifiers.remove(Modifier.PUBLIC); |
|
356 |
modifiers.remove(Modifier.ABSTRACT); // only for methods |
|
357 |
modifiers.remove(Modifier.STATIC); // only for fields |
|
358 |
modifiers.remove(Modifier.FINAL); // only for fields |
|
359 |
} |
|
360 |
break; |
|
361 |
||
362 |
} |
|
363 |
||
364 |
for(Modifier m: modifiers) { |
|
365 |
writer.print(m.toString() + " "); |
|
366 |
} |
|
367 |
} |
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368 |
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private void printFormalTypeParameters(Parameterizable e, |
10 | 370 |
boolean pad) { |
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List<? extends TypeParameterElement> typeParams = e.getTypeParameters(); |
10 | 372 |
if (typeParams.size() > 0) { |
373 |
writer.print("<"); |
|
374 |
||
375 |
boolean first = true; |
|
376 |
for(TypeParameterElement tpe: typeParams) { |
|
377 |
if (!first) |
|
378 |
writer.print(", "); |
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379 |
printAnnotationsInline(tpe); |
10 | 380 |
writer.print(tpe.toString()); |
381 |
first = false; |
|
382 |
} |
|
383 |
||
384 |
writer.print(">"); |
|
385 |
if (pad) |
|
386 |
writer.print(" "); |
|
387 |
} |
|
388 |
} |
|
389 |
||
390 |
private void printAnnotationsInline(Element e) { |
|
391 |
List<? extends AnnotationMirror> annots = e.getAnnotationMirrors(); |
|
392 |
for(AnnotationMirror annotationMirror : annots) { |
|
393 |
writer.print(annotationMirror); |
|
394 |
writer.print(" "); |
|
395 |
} |
|
396 |
} |
|
397 |
||
398 |
private void printAnnotations(Element e) { |
|
399 |
List<? extends AnnotationMirror> annots = e.getAnnotationMirrors(); |
|
400 |
for(AnnotationMirror annotationMirror : annots) { |
|
401 |
indent(); |
|
402 |
writer.println(annotationMirror); |
|
403 |
} |
|
404 |
} |
|
405 |
||
406 |
// TODO: Refactor |
|
407 |
private void printParameters(ExecutableElement e) { |
|
408 |
List<? extends VariableElement> parameters = e.getParameters(); |
|
409 |
int size = parameters.size(); |
|
410 |
||
411 |
switch (size) { |
|
412 |
case 0: |
|
413 |
break; |
|
414 |
||
415 |
case 1: |
|
416 |
for(VariableElement parameter: parameters) { |
|
417 |
printModifiers(parameter); |
|
418 |
||
419 |
if (e.isVarArgs() ) { |
|
420 |
TypeMirror tm = parameter.asType(); |
|
421 |
if (tm.getKind() != TypeKind.ARRAY) |
|
422 |
throw new AssertionError("Var-args parameter is not an array type: " + tm); |
|
423 |
writer.print((ArrayType.class.cast(tm)).getComponentType() ); |
|
424 |
writer.print("..."); |
|
425 |
} else |
|
426 |
writer.print(parameter.asType()); |
|
427 |
writer.print(" " + parameter.getSimpleName()); |
|
428 |
} |
|
429 |
break; |
|
430 |
||
431 |
default: |
|
432 |
{ |
|
433 |
int i = 1; |
|
434 |
for(VariableElement parameter: parameters) { |
|
435 |
if (i == 2) |
|
436 |
indentation++; |
|
437 |
||
438 |
if (i > 1) |
|
439 |
indent(); |
|
440 |
||
441 |
printModifiers(parameter); |
|
442 |
||
443 |
if (i == size && e.isVarArgs() ) { |
|
444 |
TypeMirror tm = parameter.asType(); |
|
445 |
if (tm.getKind() != TypeKind.ARRAY) |
|
446 |
throw new AssertionError("Var-args parameter is not an array type: " + tm); |
|
447 |
writer.print((ArrayType.class.cast(tm)).getComponentType() ); |
|
448 |
||
449 |
writer.print("..."); |
|
450 |
} else |
|
451 |
writer.print(parameter.asType()); |
|
452 |
writer.print(" " + parameter.getSimpleName()); |
|
453 |
||
454 |
if (i < size) |
|
455 |
writer.println(","); |
|
456 |
||
457 |
i++; |
|
458 |
} |
|
459 |
||
460 |
if (parameters.size() >= 2) |
|
461 |
indentation--; |
|
462 |
} |
|
463 |
break; |
|
464 |
} |
|
465 |
} |
|
466 |
||
467 |
private void printInterfaces(TypeElement e) { |
|
468 |
ElementKind kind = e.getKind(); |
|
469 |
||
470 |
if(kind != ANNOTATION_TYPE) { |
|
471 |
List<? extends TypeMirror> interfaces = e.getInterfaces(); |
|
472 |
if (interfaces.size() > 0) { |
|
473 |
writer.print((kind.isClass() ? " implements" : " extends")); |
|
474 |
||
475 |
boolean first = true; |
|
476 |
for(TypeMirror interf: interfaces) { |
|
477 |
if (!first) |
|
478 |
writer.print(","); |
|
479 |
writer.print(" "); |
|
480 |
writer.print(interf.toString()); |
|
481 |
first = false; |
|
482 |
} |
|
483 |
} |
|
484 |
} |
|
485 |
} |
|
486 |
||
487 |
private void printThrows(ExecutableElement e) { |
|
488 |
List<? extends TypeMirror> thrownTypes = e.getThrownTypes(); |
|
489 |
final int size = thrownTypes.size(); |
|
490 |
if (size != 0) { |
|
491 |
writer.print(" throws"); |
|
492 |
||
493 |
int i = 1; |
|
494 |
for(TypeMirror thrownType: thrownTypes) { |
|
495 |
if (i == 1) |
|
496 |
writer.print(" "); |
|
497 |
||
498 |
if (i == 2) |
|
499 |
indentation++; |
|
500 |
||
501 |
if (i >= 2) |
|
502 |
indent(); |
|
503 |
||
504 |
writer.print(thrownType); |
|
505 |
||
506 |
if (i != size) |
|
507 |
writer.println(", "); |
|
508 |
||
509 |
i++; |
|
510 |
} |
|
511 |
||
512 |
if (size >= 2) |
|
513 |
indentation--; |
|
514 |
} |
|
515 |
} |
|
516 |
||
517 |
private static final String [] spaces = { |
|
518 |
"", |
|
519 |
" ", |
|
520 |
" ", |
|
521 |
" ", |
|
522 |
" ", |
|
523 |
" ", |
|
524 |
" ", |
|
525 |
" ", |
|
526 |
" ", |
|
527 |
" ", |
|
528 |
" " |
|
529 |
}; |
|
530 |
||
531 |
private void indent() { |
|
532 |
int indentation = this.indentation; |
|
533 |
if (indentation < 0) |
|
534 |
return; |
|
535 |
final int maxIndex = spaces.length - 1; |
|
536 |
||
537 |
while (indentation > maxIndex) { |
|
538 |
writer.print(spaces[maxIndex]); |
|
539 |
indentation -= maxIndex; |
|
540 |
} |
|
541 |
writer.print(spaces[indentation]); |
|
542 |
} |
|
543 |
||
544 |
} |
|
545 |
} |