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src/share/classes/com/sun/tools/javah/TypeSignature.java@2eb010b6cb22 (annotated)

src/share/classes/com/sun/tools/javah/TypeSignature.java

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

author

aoqi

date

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

changeset 2525

2eb010b6cb22

parent 1054

111bbf1ad913

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2002, 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. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26
aoqi@0	27	package com.sun.tools.javah;
aoqi@0	28
aoqi@0	29	import java.util.*;
aoqi@0	30	import javax.lang.model.element.Name;
aoqi@0	31	import javax.lang.model.element.TypeElement;
aoqi@0	32	import javax.lang.model.type.ArrayType;
aoqi@0	33	import javax.lang.model.type.DeclaredType;
aoqi@0	34	import javax.lang.model.type.NoType;
aoqi@0	35	import javax.lang.model.type.PrimitiveType;
aoqi@0	36	import javax.lang.model.type.TypeKind;
aoqi@0	37	import javax.lang.model.type.TypeMirror;
aoqi@0	38	import javax.lang.model.type.TypeVariable;
aoqi@0	39	import javax.lang.model.type.TypeVisitor;
aoqi@0	40	import javax.lang.model.util.Elements;
aoqi@0	41	import javax.lang.model.util.SimpleTypeVisitor8;
aoqi@0	42
aoqi@0	43	/**
aoqi@0	44	* Returns internal type signature.
aoqi@0	45	*
aoqi@0	46	* <p><b>This is NOT part of any supported API.
aoqi@0	47	* If you write code that depends on this, you do so at your own
aoqi@0	48	* risk. This code and its internal interfaces are subject to change
aoqi@0	49	* or deletion without notice.</b></p>
aoqi@0	50	*
aoqi@0	51	* @author Sucheta Dambalkar
aoqi@0	52	*/
aoqi@0	53
aoqi@0	54	public class TypeSignature {
aoqi@0	55	static class SignatureException extends Exception {
aoqi@0	56	private static final long serialVersionUID = 1L;
aoqi@0	57	SignatureException(String reason) {
aoqi@0	58	super(reason);
aoqi@0	59	}
aoqi@0	60	}
aoqi@0	61
aoqi@0	62	Elements elems;
aoqi@0	63
aoqi@0	64	/* Signature Characters */
aoqi@0	65
aoqi@0	66	private static final String SIG_VOID = "V";
aoqi@0	67	private static final String SIG_BOOLEAN = "Z";
aoqi@0	68	private static final String SIG_BYTE = "B";
aoqi@0	69	private static final String SIG_CHAR = "C";
aoqi@0	70	private static final String SIG_SHORT = "S";
aoqi@0	71	private static final String SIG_INT = "I";
aoqi@0	72	private static final String SIG_LONG = "J";
aoqi@0	73	private static final String SIG_FLOAT = "F";
aoqi@0	74	private static final String SIG_DOUBLE = "D";
aoqi@0	75	private static final String SIG_ARRAY = "[";
aoqi@0	76	private static final String SIG_CLASS = "L";
aoqi@0	77
aoqi@0	78
aoqi@0	79
aoqi@0	80	public TypeSignature(Elements elems){
aoqi@0	81	this.elems = elems;
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	/*
aoqi@0	85	* Returns the type signature of a field according to JVM specs
aoqi@0	86	*/
aoqi@0	87	public String getTypeSignature(String javasignature) throws SignatureException {
aoqi@0	88	return getParamJVMSignature(javasignature);
aoqi@0	89	}
aoqi@0	90
aoqi@0	91	/*
aoqi@0	92	* Returns the type signature of a method according to JVM specs
aoqi@0	93	*/
aoqi@0	94	public String getTypeSignature(String javasignature, TypeMirror returnType)
aoqi@0	95	throws SignatureException {
aoqi@0	96	String signature = null; //Java type signature.
aoqi@0	97	String typeSignature = null; //Internal type signature.
aoqi@0	98	List<String> params = new ArrayList<String>(); //List of parameters.
aoqi@0	99	String paramsig = null; //Java parameter signature.
aoqi@0	100	String paramJVMSig = null; //Internal parameter signature.
aoqi@0	101	String returnSig = null; //Java return type signature.
aoqi@0	102	String returnJVMType = null; //Internal return type signature.
aoqi@0	103	int dimensions = 0; //Array dimension.
aoqi@0	104
aoqi@0	105	int startIndex = -1;
aoqi@0	106	int endIndex = -1;
aoqi@0	107	StringTokenizer st = null;
aoqi@0	108	int i = 0;
aoqi@0	109
aoqi@0	110	// Gets the actual java signature without parentheses.
aoqi@0	111	if (javasignature != null) {
aoqi@0	112	startIndex = javasignature.indexOf("(");
aoqi@0	113	endIndex = javasignature.indexOf(")");
aoqi@0	114	}
aoqi@0	115
aoqi@0	116	if (((startIndex != -1) && (endIndex != -1))
aoqi@0	117	&&(startIndex+1 < javasignature.length())
aoqi@0	118	&&(endIndex < javasignature.length())) {
aoqi@0	119	signature = javasignature.substring(startIndex+1, endIndex);
aoqi@0	120	}
aoqi@0	121
aoqi@0	122	// Separates parameters.
aoqi@0	123	if (signature != null) {
aoqi@0	124	if (signature.indexOf(",") != -1) {
aoqi@0	125	st = new StringTokenizer(signature, ",");
aoqi@0	126	if (st != null) {
aoqi@0	127	while (st.hasMoreTokens()) {
aoqi@0	128	params.add(st.nextToken());
aoqi@0	129	}
aoqi@0	130	}
aoqi@0	131	} else {
aoqi@0	132	params.add(signature);
aoqi@0	133	}
aoqi@0	134	}
aoqi@0	135
aoqi@0	136	/* JVM type signature. */
aoqi@0	137	typeSignature = "(";
aoqi@0	138
aoqi@0	139	// Gets indivisual internal parameter signature.
aoqi@0	140	while (params.isEmpty() != true) {
aoqi@0	141	paramsig = params.remove(i).trim();
aoqi@0	142	paramJVMSig = getParamJVMSignature(paramsig);
aoqi@0	143	if (paramJVMSig != null) {
aoqi@0	144	typeSignature += paramJVMSig;
aoqi@0	145	}
aoqi@0	146	}
aoqi@0	147
aoqi@0	148	typeSignature += ")";
aoqi@0	149
aoqi@0	150	// Get internal return type signature.
aoqi@0	151
aoqi@0	152	returnJVMType = "";
aoqi@0	153	if (returnType != null) {
aoqi@0	154	dimensions = dimensions(returnType);
aoqi@0	155	}
aoqi@0	156
aoqi@0	157	//Gets array dimension of return type.
aoqi@0	158	while (dimensions-- > 0) {
aoqi@0	159	returnJVMType += "[";
aoqi@0	160	}
aoqi@0	161	if (returnType != null) {
aoqi@0	162	returnSig = qualifiedTypeName(returnType);
aoqi@0	163	returnJVMType += getComponentType(returnSig);
aoqi@0	164	} else {
aoqi@0	165	System.out.println("Invalid return type.");
aoqi@0	166	}
aoqi@0	167
aoqi@0	168	typeSignature += returnJVMType;
aoqi@0	169
aoqi@0	170	return typeSignature;
aoqi@0	171	}
aoqi@0	172
aoqi@0	173	/*
aoqi@0	174	* Returns internal signature of a parameter.
aoqi@0	175	*/
aoqi@0	176	private String getParamJVMSignature(String paramsig) throws SignatureException {
aoqi@0	177	String paramJVMSig = "";
aoqi@0	178	String componentType ="";
aoqi@0	179
aoqi@0	180	if(paramsig != null){
aoqi@0	181
aoqi@0	182	if(paramsig.indexOf("[]") != -1) {
aoqi@0	183	// Gets array dimension.
aoqi@0	184	int endindex = paramsig.indexOf("[]");
aoqi@0	185	componentType = paramsig.substring(0, endindex);
aoqi@0	186	String dimensionString = paramsig.substring(endindex);
aoqi@0	187	if(dimensionString != null){
aoqi@0	188	while(dimensionString.indexOf("[]") != -1){
aoqi@0	189	paramJVMSig += "[";
aoqi@0	190	int beginindex = dimensionString.indexOf("]") + 1;
aoqi@0	191	if(beginindex < dimensionString.length()){
aoqi@0	192	dimensionString = dimensionString.substring(beginindex);
aoqi@0	193	}else
aoqi@0	194	dimensionString = "";
aoqi@0	195	}
aoqi@0	196	}
aoqi@0	197	} else componentType = paramsig;
aoqi@0	198
aoqi@0	199	paramJVMSig += getComponentType(componentType);
aoqi@0	200	}
aoqi@0	201	return paramJVMSig;
aoqi@0	202	}
aoqi@0	203
aoqi@0	204	/*
aoqi@0	205	* Returns internal signature of a component.
aoqi@0	206	*/
aoqi@0	207	private String getComponentType(String componentType) throws SignatureException {
aoqi@0	208
aoqi@0	209	String JVMSig = "";
aoqi@0	210
aoqi@0	211	if(componentType != null){
aoqi@0	212	if(componentType.equals("void")) JVMSig += SIG_VOID ;
aoqi@0	213	else if(componentType.equals("boolean")) JVMSig += SIG_BOOLEAN ;
aoqi@0	214	else if(componentType.equals("byte")) JVMSig += SIG_BYTE ;
aoqi@0	215	else if(componentType.equals("char")) JVMSig += SIG_CHAR ;
aoqi@0	216	else if(componentType.equals("short")) JVMSig += SIG_SHORT ;
aoqi@0	217	else if(componentType.equals("int")) JVMSig += SIG_INT ;
aoqi@0	218	else if(componentType.equals("long")) JVMSig += SIG_LONG ;
aoqi@0	219	else if(componentType.equals("float")) JVMSig += SIG_FLOAT ;
aoqi@0	220	else if(componentType.equals("double")) JVMSig += SIG_DOUBLE ;
aoqi@0	221	else {
aoqi@0	222	if(!componentType.equals("")){
aoqi@0	223	TypeElement classNameDoc = elems.getTypeElement(componentType);
aoqi@0	224
aoqi@0	225	if(classNameDoc == null){
aoqi@0	226	throw new SignatureException(componentType);
aoqi@0	227	}else {
aoqi@0	228	String classname = classNameDoc.getQualifiedName().toString();
aoqi@0	229	String newclassname = classname.replace('.', '/');
aoqi@0	230	JVMSig += "L";
aoqi@0	231	JVMSig += newclassname;
aoqi@0	232	JVMSig += ";";
aoqi@0	233	}
aoqi@0	234	}
aoqi@0	235	}
aoqi@0	236	}
aoqi@0	237	return JVMSig;
aoqi@0	238	}
aoqi@0	239
aoqi@0	240	int dimensions(TypeMirror t) {
aoqi@0	241	if (t.getKind() != TypeKind.ARRAY)
aoqi@0	242	return 0;
aoqi@0	243	return 1 + dimensions(((ArrayType) t).getComponentType());
aoqi@0	244	}
aoqi@0	245
aoqi@0	246
aoqi@0	247	String qualifiedTypeName(TypeMirror type) {
aoqi@0	248	TypeVisitor<Name, Void> v = new SimpleTypeVisitor8<Name, Void>() {
aoqi@0	249	@Override
aoqi@0	250	public Name visitArray(ArrayType t, Void p) {
aoqi@0	251	return t.getComponentType().accept(this, p);
aoqi@0	252	}
aoqi@0	253
aoqi@0	254	@Override
aoqi@0	255	public Name visitDeclared(DeclaredType t, Void p) {
aoqi@0	256	return ((TypeElement) t.asElement()).getQualifiedName();
aoqi@0	257	}
aoqi@0	258
aoqi@0	259	@Override
aoqi@0	260	public Name visitPrimitive(PrimitiveType t, Void p) {
aoqi@0	261	return elems.getName(t.toString());
aoqi@0	262	}
aoqi@0	263
aoqi@0	264	@Override
aoqi@0	265	public Name visitNoType(NoType t, Void p) {
aoqi@0	266	if (t.getKind() == TypeKind.VOID)
aoqi@0	267	return elems.getName("void");
aoqi@0	268	return defaultAction(t, p);
aoqi@0	269	}
aoqi@0	270
aoqi@0	271	@Override
aoqi@0	272	public Name visitTypeVariable(TypeVariable t, Void p) {
aoqi@0	273	return t.getUpperBound().accept(this, p);
aoqi@0	274	}
aoqi@0	275	};
aoqi@0	276	return v.visit(type).toString();
aoqi@0	277	}
aoqi@0	278	}