| /* |
| * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved. |
| * 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.javah; |
| |
| import java.util.*; |
| import javax.lang.model.element.Name; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.ArrayType; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.NoType; |
| import javax.lang.model.type.PrimitiveType; |
| import javax.lang.model.type.TypeKind; |
| import javax.lang.model.type.TypeMirror; |
| import javax.lang.model.type.TypeVariable; |
| import javax.lang.model.type.TypeVisitor; |
| import javax.lang.model.util.Elements; |
| import javax.lang.model.util.SimpleTypeVisitor9; |
| |
| import com.sun.tools.javac.util.DefinedBy; |
| import com.sun.tools.javac.util.DefinedBy.Api; |
| |
| /** |
| * Returns internal type signature. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own |
| * risk. This code and its internal interfaces are subject to change |
| * or deletion without notice.</b></p> |
| * |
| * @author Sucheta Dambalkar |
| */ |
| |
| public class TypeSignature { |
| static class SignatureException extends Exception { |
| private static final long serialVersionUID = 1L; |
| SignatureException(String reason) { |
| super(reason); |
| } |
| } |
| |
| Elements elems; |
| |
| /* Signature Characters */ |
| |
| private static final String SIG_VOID = "V"; |
| private static final String SIG_BOOLEAN = "Z"; |
| private static final String SIG_BYTE = "B"; |
| private static final String SIG_CHAR = "C"; |
| private static final String SIG_SHORT = "S"; |
| private static final String SIG_INT = "I"; |
| private static final String SIG_LONG = "J"; |
| private static final String SIG_FLOAT = "F"; |
| private static final String SIG_DOUBLE = "D"; |
| private static final String SIG_ARRAY = "["; |
| private static final String SIG_CLASS = "L"; |
| |
| |
| |
| public TypeSignature(Elements elems){ |
| this.elems = elems; |
| } |
| |
| /* |
| * Returns the type signature of a field according to JVM specs |
| */ |
| public String getTypeSignature(String javasignature) throws SignatureException { |
| return getParamJVMSignature(javasignature); |
| } |
| |
| /* |
| * Returns the type signature of a method according to JVM specs |
| */ |
| public String getTypeSignature(String javasignature, TypeMirror returnType) |
| throws SignatureException { |
| String signature = null; //Java type signature. |
| String typeSignature = null; //Internal type signature. |
| List<String> params = new ArrayList<>(); //List of parameters. |
| String paramsig = null; //Java parameter signature. |
| String paramJVMSig = null; //Internal parameter signature. |
| String returnSig = null; //Java return type signature. |
| String returnJVMType = null; //Internal return type signature. |
| int dimensions = 0; //Array dimension. |
| |
| int startIndex = -1; |
| int endIndex = -1; |
| StringTokenizer st = null; |
| int i = 0; |
| |
| // Gets the actual java signature without parentheses. |
| if (javasignature != null) { |
| startIndex = javasignature.indexOf("("); |
| endIndex = javasignature.indexOf(")"); |
| } |
| |
| if (((startIndex != -1) && (endIndex != -1)) |
| &&(startIndex+1 < javasignature.length()) |
| &&(endIndex < javasignature.length())) { |
| signature = javasignature.substring(startIndex+1, endIndex); |
| } |
| |
| // Separates parameters. |
| if (signature != null) { |
| if (signature.contains(",")) { |
| st = new StringTokenizer(signature, ","); |
| if (st != null) { |
| while (st.hasMoreTokens()) { |
| params.add(st.nextToken()); |
| } |
| } |
| } else { |
| params.add(signature); |
| } |
| } |
| |
| /* JVM type signature. */ |
| typeSignature = "("; |
| |
| // Gets indivisual internal parameter signature. |
| while (params.isEmpty() != true) { |
| paramsig = params.remove(i).trim(); |
| paramJVMSig = getParamJVMSignature(paramsig); |
| if (paramJVMSig != null) { |
| typeSignature += paramJVMSig; |
| } |
| } |
| |
| typeSignature += ")"; |
| |
| // Get internal return type signature. |
| |
| returnJVMType = ""; |
| if (returnType != null) { |
| dimensions = dimensions(returnType); |
| } |
| |
| //Gets array dimension of return type. |
| while (dimensions-- > 0) { |
| returnJVMType += "["; |
| } |
| if (returnType != null) { |
| returnSig = qualifiedTypeName(returnType); |
| returnJVMType += getComponentType(returnSig); |
| } else { |
| System.out.println("Invalid return type."); |
| } |
| |
| typeSignature += returnJVMType; |
| |
| return typeSignature; |
| } |
| |
| /* |
| * Returns internal signature of a parameter. |
| */ |
| private String getParamJVMSignature(String paramsig) throws SignatureException { |
| String paramJVMSig = ""; |
| String componentType =""; |
| |
| if(paramsig != null){ |
| |
| if(paramsig.contains("[]")) { |
| // Gets array dimension. |
| int endindex = paramsig.indexOf("[]"); |
| componentType = paramsig.substring(0, endindex); |
| String dimensionString = paramsig.substring(endindex); |
| if(dimensionString != null){ |
| while(dimensionString.contains("[]")){ |
| paramJVMSig += "["; |
| int beginindex = dimensionString.indexOf("]") + 1; |
| if(beginindex < dimensionString.length()){ |
| dimensionString = dimensionString.substring(beginindex); |
| }else |
| dimensionString = ""; |
| } |
| } |
| } else componentType = paramsig; |
| |
| paramJVMSig += getComponentType(componentType); |
| } |
| return paramJVMSig; |
| } |
| |
| /* |
| * Returns internal signature of a component. |
| */ |
| private String getComponentType(String componentType) throws SignatureException { |
| |
| String JVMSig = ""; |
| |
| if(componentType != null){ |
| switch (componentType) { |
| case "void": JVMSig += SIG_VOID; break; |
| case "boolean": JVMSig += SIG_BOOLEAN; break; |
| case "byte": JVMSig += SIG_BYTE; break; |
| case "char": JVMSig += SIG_CHAR; break; |
| case "short": JVMSig += SIG_SHORT; break; |
| case "int": JVMSig += SIG_INT; break; |
| case "long": JVMSig += SIG_LONG; break; |
| case "float": JVMSig += SIG_FLOAT; break; |
| case "double": JVMSig += SIG_DOUBLE; break; |
| default: |
| if (!componentType.equals("")) { |
| TypeElement classNameDoc = elems.getTypeElement(componentType); |
| |
| if (classNameDoc == null) { |
| throw new SignatureException(componentType); |
| } |
| else { |
| String classname = classNameDoc.getQualifiedName().toString(); |
| String newclassname = classname.replace('.', '/'); |
| JVMSig += "L"; |
| JVMSig += newclassname; |
| JVMSig += ";"; |
| } |
| } |
| break; |
| } |
| } |
| return JVMSig; |
| } |
| |
| int dimensions(TypeMirror t) { |
| if (t.getKind() != TypeKind.ARRAY) |
| return 0; |
| return 1 + dimensions(((ArrayType) t).getComponentType()); |
| } |
| |
| |
| String qualifiedTypeName(TypeMirror type) { |
| TypeVisitor<Name, Void> v = new SimpleTypeVisitor9<Name, Void>() { |
| @Override @DefinedBy(Api.LANGUAGE_MODEL) |
| public Name visitArray(ArrayType t, Void p) { |
| return t.getComponentType().accept(this, p); |
| } |
| |
| @Override @DefinedBy(Api.LANGUAGE_MODEL) |
| public Name visitDeclared(DeclaredType t, Void p) { |
| return ((TypeElement) t.asElement()).getQualifiedName(); |
| } |
| |
| @Override @DefinedBy(Api.LANGUAGE_MODEL) |
| public Name visitPrimitive(PrimitiveType t, Void p) { |
| return elems.getName(t.toString()); |
| } |
| |
| @Override @DefinedBy(Api.LANGUAGE_MODEL) |
| public Name visitNoType(NoType t, Void p) { |
| if (t.getKind() == TypeKind.VOID) |
| return elems.getName("void"); |
| return defaultAction(t, p); |
| } |
| |
| @Override @DefinedBy(Api.LANGUAGE_MODEL) |
| public Name visitTypeVariable(TypeVariable t, Void p) { |
| return t.getUpperBound().accept(this, p); |
| } |
| }; |
| return v.visit(type).toString(); |
| } |
| } |