author | darcy |
Tue, 05 Jul 2011 16:37:24 -0700 | |
changeset 10192 | 378321489bea |
parent 7681 | 1f0819a3341f |
child 22159 | 682da512ec17 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2011, 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.javah; |
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import java.util.*; |
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import javax.lang.model.element.Name; |
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import javax.lang.model.element.TypeElement; |
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import javax.lang.model.type.ArrayType; |
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import javax.lang.model.type.DeclaredType; |
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import javax.lang.model.type.NoType; |
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import javax.lang.model.type.PrimitiveType; |
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import javax.lang.model.type.TypeKind; |
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import javax.lang.model.type.TypeMirror; |
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import javax.lang.model.type.TypeVariable; |
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import javax.lang.model.type.TypeVisitor; |
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import javax.lang.model.util.Elements; |
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import javax.lang.model.util.SimpleTypeVisitor8; |
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/** |
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* Returns internal type signature. |
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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 |
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* risk. This code and its internal interfaces are subject to change |
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* or deletion without notice.</b></p> |
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* |
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* @author Sucheta Dambalkar |
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*/ |
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public class TypeSignature { |
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static class SignatureException extends Exception { |
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private static final long serialVersionUID = 1L; |
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SignatureException(String reason) { |
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super(reason); |
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} |
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} |
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Elements elems; |
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/* Signature Characters */ |
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private static final String SIG_VOID = "V"; |
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private static final String SIG_BOOLEAN = "Z"; |
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private static final String SIG_BYTE = "B"; |
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private static final String SIG_CHAR = "C"; |
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private static final String SIG_SHORT = "S"; |
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private static final String SIG_INT = "I"; |
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private static final String SIG_LONG = "J"; |
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private static final String SIG_FLOAT = "F"; |
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private static final String SIG_DOUBLE = "D"; |
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private static final String SIG_ARRAY = "["; |
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private static final String SIG_CLASS = "L"; |
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public TypeSignature(Elements elems){ |
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this.elems = elems; |
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} |
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/* |
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* Returns the type signature of a field according to JVM specs |
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*/ |
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public String getTypeSignature(String javasignature) throws SignatureException { |
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return getParamJVMSignature(javasignature); |
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} |
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/* |
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* Returns the type signature of a method according to JVM specs |
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*/ |
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public String getTypeSignature(String javasignature, TypeMirror returnType) |
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throws SignatureException { |
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String signature = null; //Java type signature. |
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String typeSignature = null; //Internal type signature. |
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List<String> params = new ArrayList<String>(); //List of parameters. |
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String paramsig = null; //Java parameter signature. |
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String paramJVMSig = null; //Internal parameter signature. |
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String returnSig = null; //Java return type signature. |
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String returnJVMType = null; //Internal return type signature. |
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int dimensions = 0; //Array dimension. |
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int startIndex = -1; |
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int endIndex = -1; |
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StringTokenizer st = null; |
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int i = 0; |
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// Gets the actual java signature without parentheses. |
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if (javasignature != null) { |
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startIndex = javasignature.indexOf("("); |
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endIndex = javasignature.indexOf(")"); |
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} |
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if (((startIndex != -1) && (endIndex != -1)) |
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&&(startIndex+1 < javasignature.length()) |
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&&(endIndex < javasignature.length())) { |
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signature = javasignature.substring(startIndex+1, endIndex); |
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} |
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// Separates parameters. |
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if (signature != null) { |
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if (signature.indexOf(",") != -1) { |
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st = new StringTokenizer(signature, ","); |
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if (st != null) { |
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while (st.hasMoreTokens()) { |
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params.add(st.nextToken()); |
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} |
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} |
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} else { |
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params.add(signature); |
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} |
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} |
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/* JVM type signature. */ |
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typeSignature = "("; |
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// Gets indivisual internal parameter signature. |
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while (params.isEmpty() != true) { |
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paramsig = params.remove(i).trim(); |
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paramJVMSig = getParamJVMSignature(paramsig); |
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if (paramJVMSig != null) { |
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typeSignature += paramJVMSig; |
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} |
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} |
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typeSignature += ")"; |
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// Get internal return type signature. |
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returnJVMType = ""; |
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if (returnType != null) { |
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dimensions = dimensions(returnType); |
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} |
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//Gets array dimension of return type. |
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while (dimensions-- > 0) { |
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returnJVMType += "["; |
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} |
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if (returnType != null) { |
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returnSig = qualifiedTypeName(returnType); |
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returnJVMType += getComponentType(returnSig); |
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} else { |
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System.out.println("Invalid return type."); |
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} |
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typeSignature += returnJVMType; |
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return typeSignature; |
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} |
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/* |
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* Returns internal signature of a parameter. |
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*/ |
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private String getParamJVMSignature(String paramsig) throws SignatureException { |
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String paramJVMSig = ""; |
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String componentType =""; |
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if(paramsig != null){ |
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if(paramsig.indexOf("[]") != -1) { |
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// Gets array dimension. |
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int endindex = paramsig.indexOf("[]"); |
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componentType = paramsig.substring(0, endindex); |
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String dimensionString = paramsig.substring(endindex); |
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if(dimensionString != null){ |
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while(dimensionString.indexOf("[]") != -1){ |
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paramJVMSig += "["; |
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int beginindex = dimensionString.indexOf("]") + 1; |
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if(beginindex < dimensionString.length()){ |
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dimensionString = dimensionString.substring(beginindex); |
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}else |
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dimensionString = ""; |
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} |
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} |
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} else componentType = paramsig; |
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paramJVMSig += getComponentType(componentType); |
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} |
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return paramJVMSig; |
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} |
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/* |
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* Returns internal signature of a component. |
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*/ |
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private String getComponentType(String componentType) throws SignatureException { |
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String JVMSig = ""; |
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if(componentType != null){ |
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if(componentType.equals("void")) JVMSig += SIG_VOID ; |
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else if(componentType.equals("boolean")) JVMSig += SIG_BOOLEAN ; |
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else if(componentType.equals("byte")) JVMSig += SIG_BYTE ; |
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else if(componentType.equals("char")) JVMSig += SIG_CHAR ; |
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else if(componentType.equals("short")) JVMSig += SIG_SHORT ; |
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else if(componentType.equals("int")) JVMSig += SIG_INT ; |
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else if(componentType.equals("long")) JVMSig += SIG_LONG ; |
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else if(componentType.equals("float")) JVMSig += SIG_FLOAT ; |
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else if(componentType.equals("double")) JVMSig += SIG_DOUBLE ; |
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else { |
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if(!componentType.equals("")){ |
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TypeElement classNameDoc = elems.getTypeElement(componentType); |
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if(classNameDoc == null){ |
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throw new SignatureException(componentType); |
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}else { |
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String classname = classNameDoc.getQualifiedName().toString(); |
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String newclassname = classname.replace('.', '/'); |
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JVMSig += "L"; |
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JVMSig += newclassname; |
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JVMSig += ";"; |
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} |
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} |
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} |
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} |
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return JVMSig; |
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} |
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int dimensions(TypeMirror t) { |
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if (t.getKind() != TypeKind.ARRAY) |
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return 0; |
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return 1 + dimensions(((ArrayType) t).getComponentType()); |
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} |
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String qualifiedTypeName(TypeMirror type) { |
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TypeVisitor<Name, Void> v = new SimpleTypeVisitor8<Name, Void>() { |
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@Override |
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public Name visitArray(ArrayType t, Void p) { |
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return t.getComponentType().accept(this, p); |
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} |
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@Override |
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public Name visitDeclared(DeclaredType t, Void p) { |
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return ((TypeElement) t.asElement()).getQualifiedName(); |
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} |
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@Override |
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public Name visitPrimitive(PrimitiveType t, Void p) { |
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return elems.getName(t.toString()); |
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} |
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@Override |
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public Name visitNoType(NoType t, Void p) { |
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if (t.getKind() == TypeKind.VOID) |
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return elems.getName("void"); |
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return defaultAction(t, p); |
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} |
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|
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@Override |
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public Name visitTypeVariable(TypeVariable t, Void p) { |
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return t.getUpperBound().accept(this, p); |
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} |
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}; |
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return v.visit(type).toString(); |
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} |
10 | 278 |
} |