jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/jvm/JNIWriter.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/jvm/JNIWriter.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/jvm/JNIWriter.java

Sun, 17 Feb 2013 16:44:55 -0500

author: dholmes
date: Sun, 17 Feb 2013 16:44:55 -0500
changeset 1571: af8417e590f4
parent 1521: 71f35e4b93a5
child 1723: a2889739cf21
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1999, 2013, 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.javac.jvm;
 import java.io.IOException;
 import java.io.Writer;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Stack;
 import java.util.StringTokenizer;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ExecutableElement;
 import javax.lang.model.element.Modifier;
 import javax.lang.model.element.Name;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.element.VariableElement;
 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.ElementFilter;
 import javax.lang.model.util.Elements;
 import javax.lang.model.util.SimpleTypeVisitor8;
 import javax.lang.model.util.Types;
 import javax.tools.FileObject;
 import javax.tools.JavaFileManager;
 import javax.tools.StandardLocation;
 import com.sun.tools.javac.code.Attribute;
 import com.sun.tools.javac.code.Flags;
 import com.sun.tools.javac.code.Kinds;
 import com.sun.tools.javac.code.Scope;
 import com.sun.tools.javac.code.Symbol.ClassSymbol;
 import com.sun.tools.javac.code.Symtab;
 import com.sun.tools.javac.model.JavacElements;
 import com.sun.tools.javac.model.JavacTypes;
 import com.sun.tools.javac.util.Assert;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.Log;
 import com.sun.tools.javac.util.Options;
 import static com.sun.tools.javac.main.Option.*;
 /** This class provides operations to write native header files for classes.
  *
  *  <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>
  */
 public class JNIWriter {
     protected static final Context.Key<JNIWriter> jniWriterKey =
         new Context.Key<JNIWriter>();
     /** Access to files. */
     private final JavaFileManager fileManager;
     JavacElements elements;
     JavacTypes types;
     /** The log to use for verbose output.
      */
     private final Log log;
     /** Switch: verbose output.
      */
     private boolean verbose;
     /** Switch: check all nested classes of top level class
      */
     private boolean checkAll;
     private Mangle mangler;
     private Context context;
     private Symtab syms;
     private String lineSep;
     private final boolean isWindows =
         System.getProperty("os.name").startsWith("Windows");
     /** Get the ClassWriter instance for this context. */
     public static JNIWriter instance(Context context) {
         JNIWriter instance = context.get(jniWriterKey);
         if (instance == null)
             instance = new JNIWriter(context);
         return instance;
     }
     /** Construct a class writer, given an options table.
      */
     private JNIWriter(Context context) {
         context.put(jniWriterKey, this);
         fileManager = context.get(JavaFileManager.class);
         log = Log.instance(context);
         Options options = Options.instance(context);
         verbose = options.isSet(VERBOSE);
         checkAll = options.isSet("javah:full");
         this.context = context; // for lazyInit()
         syms = Symtab.instance(context);
         lineSep = System.getProperty("line.separator");
     }
     private void lazyInit() {
         if (mangler == null) {
             elements = JavacElements.instance(context);
             types = JavacTypes.instance(context);
             mangler = new Mangle(elements, types);
         }
     }
     public boolean needsHeader(ClassSymbol c) {
         if (c.isLocal() || (c.flags() & Flags.SYNTHETIC) != 0)
             return false;
         if (checkAll)
             return needsHeader(c.outermostClass(), true);
         else
             return needsHeader(c, false);
     }
     private boolean needsHeader(ClassSymbol c, boolean checkNestedClasses) {
         if (c.isLocal() || (c.flags() & Flags.SYNTHETIC) != 0)
             return false;
         /* temporary code for backwards compatibility */
         for (Attribute.Compound a: c.annotations.getDeclarationAttributes()) {
             if (a.type.tsym == syms.nativeHeaderType_old.tsym)
                 return true;
         }
         /* end of temporary code for backwards compatibility */
         for (Scope.Entry i = c.members_field.elems; i != null; i = i.sibling) {
             if (i.sym.kind == Kinds.MTH && (i.sym.flags() & Flags.NATIVE) != 0)
                 return true;
             for (Attribute.Compound a: i.sym.annotations.getDeclarationAttributes()) {
                 if (a.type.tsym == syms.nativeHeaderType.tsym)
                     return true;
             }
         }
         if (checkNestedClasses) {
             for (Scope.Entry i = c.members_field.elems; i != null; i = i.sibling) {
                 if ((i.sym.kind == Kinds.TYP) && needsHeader(((ClassSymbol) i.sym), true))
                     return true;
             }
         }
         return false;
     }
     /** Emit a class file for a given class.
      *  @param c      The class from which a class file is generated.
      */
     public FileObject write(ClassSymbol c)
         throws IOException
     {
         String className = c.flatName().toString();
         FileObject outFile
             = fileManager.getFileForOutput(StandardLocation.NATIVE_HEADER_OUTPUT,
                 "", className.replaceAll("[.$]", "_") + ".h", null);
         Writer out = outFile.openWriter();
         try {
             write(out, c);
             if (verbose)
                 log.printVerbose("wrote.file", outFile);
             out.close();
             out = null;
         } finally {
             if (out != null) {
                 // if we are propogating an exception, delete the file
                 out.close();
                 outFile.delete();
                 outFile = null;
             }
         }
         return outFile; // may be null if write failed
     }
     public void write(Writer out, ClassSymbol sym)
             throws IOException {
         lazyInit();
         try {
             String cname = mangler.mangle(sym.fullname, Mangle.Type.CLASS);
             println(out, fileTop());
             println(out, includes());
             println(out, guardBegin(cname));
             println(out, cppGuardBegin());
             writeStatics(out, sym);
             writeMethods(out, sym, cname);
             println(out, cppGuardEnd());
             println(out, guardEnd(cname));
         } catch (TypeSignature.SignatureException e) {
             throw new IOException(e);
         }
     }
     protected void writeStatics(Writer out, ClassSymbol sym) throws IOException {
         List<VariableElement> classfields = getAllFields(sym);
         for (VariableElement v: classfields) {
             if (!v.getModifiers().contains(Modifier.STATIC))
                 continue;
             String s = null;
             s = defineForStatic(sym, v);
             if (s != null) {
                 println(out, s);
             }
         }
     }
     /**
      * Including super class fields.
      */
     List<VariableElement> getAllFields(TypeElement subclazz) {
         List<VariableElement> fields = new ArrayList<VariableElement>();
         TypeElement cd = null;
         Stack<TypeElement> s = new Stack<TypeElement>();
         cd = subclazz;
         while (true) {
             s.push(cd);
             TypeElement c = (TypeElement) (types.asElement(cd.getSuperclass()));
             if (c == null)
                 break;
             cd = c;
         }
         while (!s.empty()) {
             cd = s.pop();
             fields.addAll(ElementFilter.fieldsIn(cd.getEnclosedElements()));
         }
         return fields;
     }
     protected String defineForStatic(TypeElement c, VariableElement f) {
         CharSequence cnamedoc = c.getQualifiedName();
         CharSequence fnamedoc = f.getSimpleName();
         String cname = mangler.mangle(cnamedoc, Mangle.Type.CLASS);
         String fname = mangler.mangle(fnamedoc, Mangle.Type.FIELDSTUB);
         Assert.check(f.getModifiers().contains(Modifier.STATIC));
         if (f.getModifiers().contains(Modifier.FINAL)) {
             Object value = null;
             value = f.getConstantValue();
             if (value != null) { /* so it is a ConstantExpression */
                 String constString = null;
                 if ((value instanceof Integer)
                     || (value instanceof Byte)
                     || (value instanceof Short)) {
                     /* covers byte, short, int */
                     constString = value.toString() + "L";
                 } else if (value instanceof Boolean) {
                     constString = ((Boolean) value) ? "1L" : "0L";
                 } else if (value instanceof Character) {
                     Character ch = (Character) value;
                     constString = String.valueOf(((int) ch) & 0xffff) + "L";
                 } else if (value instanceof Long) {
                     // Visual C++ supports the i64 suffix, not LL.
                     if (isWindows)
                         constString = value.toString() + "i64";
                     else
                         constString = value.toString() + "LL";
                 } else if (value instanceof Float) {
                     /* bug for bug */
                     float fv = ((Float)value).floatValue();
                     if (Float.isInfinite(fv))
                         constString = ((fv < 0) ? "-" : "") + "Inff";
                     else
                         constString = value.toString() + "f";
                 } else if (value instanceof Double) {
                     /* bug for bug */
                     double d = ((Double)value).doubleValue();
                     if (Double.isInfinite(d))
                         constString = ((d < 0) ? "-" : "") + "InfD";
                     else
                         constString = value.toString();
                 }
                 if (constString != null) {
                     StringBuilder s = new StringBuilder("#undef ");
                     s.append(cname); s.append("_"); s.append(fname); s.append(lineSep);
                     s.append("#define "); s.append(cname); s.append("_");
                     s.append(fname); s.append(" "); s.append(constString);
                     return s.toString();
                 }
             }
         }
         return null;
     }
     protected void writeMethods(Writer out, ClassSymbol sym, String cname)
             throws IOException, TypeSignature.SignatureException {
         List<ExecutableElement> classmethods = ElementFilter.methodsIn(sym.getEnclosedElements());
         for (ExecutableElement md: classmethods) {
             if(md.getModifiers().contains(Modifier.NATIVE)){
                 TypeMirror mtr = types.erasure(md.getReturnType());
                 String sig = signature(md);
                 TypeSignature newtypesig = new TypeSignature(elements);
                 CharSequence methodName = md.getSimpleName();
                 boolean longName = false;
                 for (ExecutableElement md2: classmethods) {
                     if ((md2 != md)
                         && (methodName.equals(md2.getSimpleName()))
                         && (md2.getModifiers().contains(Modifier.NATIVE)))
                         longName = true;
                 }
                 println(out, "/*");
                 println(out, " * Class:     " + cname);
                 println(out, " * Method:    " +
                            mangler.mangle(methodName, Mangle.Type.FIELDSTUB));
                 println(out, " * Signature: " + newtypesig.getTypeSignature(sig, mtr));
                 println(out, " */");
                 println(out, "JNIEXPORT " + jniType(mtr) +
                            " JNICALL " +
                            mangler.mangleMethod(md, sym,
                                                (longName) ?
                                                Mangle.Type.METHOD_JNI_LONG :
                                                Mangle.Type.METHOD_JNI_SHORT));
                 print(out, "  (JNIEnv *, ");
                 List<? extends VariableElement> paramargs = md.getParameters();
                 List<TypeMirror> args = new ArrayList<TypeMirror>();
                 for (VariableElement p: paramargs) {
                     args.add(types.erasure(p.asType()));
                 }
                 if (md.getModifiers().contains(Modifier.STATIC))
                     print(out, "jclass");
                 else
                     print(out, "jobject");
                 for (TypeMirror arg: args) {
                     print(out, ", ");
                     print(out, jniType(arg));
                 }
                 println(out, ");"
                         + lineSep);
             }
         }
     }
     // c.f. MethodDoc.signature
     String signature(ExecutableElement e) {
         StringBuilder sb = new StringBuilder("(");
         String sep = "";
         for (VariableElement p: e.getParameters()) {
             sb.append(sep);
             sb.append(types.erasure(p.asType()).toString());
             sep = ",";
         }
         sb.append(")");
         return sb.toString();
     }
     protected final String jniType(TypeMirror t) {
         TypeElement throwable = elements.getTypeElement("java.lang.Throwable");
         TypeElement jClass = elements.getTypeElement("java.lang.Class");
         TypeElement jString = elements.getTypeElement("java.lang.String");
         Element tclassDoc = types.asElement(t);
         switch (t.getKind()) {
             case ARRAY: {
                 TypeMirror ct = ((ArrayType) t).getComponentType();
                 switch (ct.getKind()) {
                     case BOOLEAN:  return "jbooleanArray";
                     case BYTE:     return "jbyteArray";
                     case CHAR:     return "jcharArray";
                     case SHORT:    return "jshortArray";
                     case INT:      return "jintArray";
                     case LONG:     return "jlongArray";
                     case FLOAT:    return "jfloatArray";
                     case DOUBLE:   return "jdoubleArray";
                     case ARRAY:
                     case DECLARED: return "jobjectArray";
                     default: throw new Error(ct.toString());
                 }
             }
             case VOID:     return "void";
             case BOOLEAN:  return "jboolean";
             case BYTE:     return "jbyte";
             case CHAR:     return "jchar";
             case SHORT:    return "jshort";
             case INT:      return "jint";
             case LONG:     return "jlong";
             case FLOAT:    return "jfloat";
             case DOUBLE:   return "jdouble";
             case DECLARED: {
                 if (tclassDoc.equals(jString))
                     return "jstring";
                 else if (types.isAssignable(t, throwable.asType()))
                     return "jthrowable";
                 else if (types.isAssignable(t, jClass.asType()))
                     return "jclass";
                 else
                     return "jobject";
             }
         }
         Assert.check(false, "jni unknown type");
         return null; /* dead code. */
     }
     protected String fileTop() {
         return "/* DO NOT EDIT THIS FILE - it is machine generated */";
     }
     protected String includes() {
         return "#include <jni.h>";
     }
     /*
      * Deal with the C pre-processor.
      */
     protected String cppGuardBegin() {
         return "#ifdef __cplusplus" + lineSep
                 + "extern \"C\" {" + lineSep
                 + "#endif";
     }
     protected String cppGuardEnd() {
         return "#ifdef __cplusplus" + lineSep
                 + "}" + lineSep
                 + "#endif";
     }
     protected String guardBegin(String cname) {
         return "/* Header for class " + cname + " */" + lineSep
                 + lineSep
                 + "#ifndef _Included_" + cname + lineSep
                 + "#define _Included_" + cname;
     }
     protected String guardEnd(String cname) {
         return "#endif";
     }
     protected void print(Writer out, String text) throws IOException {
         out.write(text);
     }
     protected void println(Writer out, String text) throws IOException {
         out.write(text);
         out.write(lineSep);
     }
     private static class Mangle {
         public static class Type {
             public static final int CLASS            = 1;
             public static final int FIELDSTUB        = 2;
             public static final int FIELD            = 3;
             public static final int JNI              = 4;
             public static final int SIGNATURE        = 5;
             public static final int METHOD_JDK_1     = 6;
             public static final int METHOD_JNI_SHORT = 7;
             public static final int METHOD_JNI_LONG  = 8;
         };
         private Elements elems;
         private Types types;
         Mangle(Elements elems, Types types) {
             this.elems = elems;
             this.types = types;
         }
         public final String mangle(CharSequence name, int mtype) {
             StringBuilder result = new StringBuilder(100);
             int length = name.length();
             for (int i = 0; i < length; i++) {
                 char ch = name.charAt(i);
                 if (isalnum(ch)) {
                     result.append(ch);
                 } else if ((ch == '.') &&
                            mtype == Mangle.Type.CLASS) {
                     result.append('_');
                 } else if (( ch == '$') &&
                            mtype == Mangle.Type.CLASS) {
                     result.append('_');
                     result.append('_');
                 } else if (ch == '_' && mtype == Mangle.Type.FIELDSTUB) {
                     result.append('_');
                 } else if (ch == '_' && mtype == Mangle.Type.CLASS) {
                     result.append('_');
                 } else if (mtype == Mangle.Type.JNI) {
                     String esc = null;
                     if (ch == '_')
                         esc = "_1";
                     else if (ch == '.')
                         esc = "_";
                     else if (ch == ';')
                         esc = "_2";
                     else if (ch == '[')
                         esc = "_3";
                     if (esc != null) {
                         result.append(esc);
                     } else {
                         result.append(mangleChar(ch));
                     }
                 } else if (mtype == Mangle.Type.SIGNATURE) {
                     if (isprint(ch)) {
                         result.append(ch);
                     } else {
                         result.append(mangleChar(ch));
                     }
                 } else {
                     result.append(mangleChar(ch));
                 }
             }
             return result.toString();
         }
         public String mangleMethod(ExecutableElement method, TypeElement clazz,
                                           int mtype) throws TypeSignature.SignatureException {
             StringBuilder result = new StringBuilder(100);
             result.append("Java_");
             if (mtype == Mangle.Type.METHOD_JDK_1) {
                 result.append(mangle(clazz.getQualifiedName(), Mangle.Type.CLASS));
                 result.append('_');
                 result.append(mangle(method.getSimpleName(),
                                      Mangle.Type.FIELD));
                 result.append("_stub");
                 return result.toString();
             }
             /* JNI */
             result.append(mangle(getInnerQualifiedName(clazz), Mangle.Type.JNI));
             result.append('_');
             result.append(mangle(method.getSimpleName(),
                                  Mangle.Type.JNI));
             if (mtype == Mangle.Type.METHOD_JNI_LONG) {
                 result.append("__");
                 String typesig = signature(method);
                 TypeSignature newTypeSig = new TypeSignature(elems);
                 String sig = newTypeSig.getTypeSignature(typesig,  method.getReturnType());
                 sig = sig.substring(1);
                 sig = sig.substring(0, sig.lastIndexOf(')'));
                 sig = sig.replace('/', '.');
                 result.append(mangle(sig, Mangle.Type.JNI));
             }
             return result.toString();
         }
         //where
             private String getInnerQualifiedName(TypeElement clazz) {
                 return elems.getBinaryName(clazz).toString();
             }
         public final String mangleChar(char ch) {
             String s = Integer.toHexString(ch);
             int nzeros = 5 - s.length();
             char[] result = new char[6];
             result[0] = '_';
             for (int i = 1; i <= nzeros; i++)
                 result[i] = '0';
             for (int i = nzeros+1, j = 0; i < 6; i++, j++)
                 result[i] = s.charAt(j);
             return new String(result);
         }
         // Warning: duplicated in Gen
         private String signature(ExecutableElement e) {
             StringBuilder sb = new StringBuilder();
             String sep = "(";
             for (VariableElement p: e.getParameters()) {
                 sb.append(sep);
                 sb.append(types.erasure(p.asType()).toString());
                 sep = ",";
             }
             sb.append(")");
             return sb.toString();
         }
         /* Warning: Intentional ASCII operation. */
         private static boolean isalnum(char ch) {
             return ch <= 0x7f && /* quick test */
                 ((ch >= 'A' && ch <= 'Z') ||
                  (ch >= 'a' && ch <= 'z') ||
                  (ch >= '0' && ch <= '9'));
         }
         /* Warning: Intentional ASCII operation. */
         private static boolean isprint(char ch) {
             return ch >= 32 && ch <= 126;
         }
     }
     private static 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<String>(); //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.indexOf(",") != -1) {
                     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.indexOf("[]") != -1) {
                     // Gets array dimension.
                     int endindex = paramsig.indexOf("[]");
                     componentType = paramsig.substring(0, endindex);
                     String dimensionString =  paramsig.substring(endindex);
                     if(dimensionString != null){
                         while(dimensionString.indexOf("[]") != -1){
                             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){
                 if(componentType.equals("void")) JVMSig += SIG_VOID ;
                 else if(componentType.equals("boolean"))  JVMSig += SIG_BOOLEAN ;
                 else if(componentType.equals("byte")) JVMSig += SIG_BYTE ;
                 else if(componentType.equals("char"))  JVMSig += SIG_CHAR ;
                 else if(componentType.equals("short"))  JVMSig += SIG_SHORT ;
                 else if(componentType.equals("int"))  JVMSig += SIG_INT ;
                 else if(componentType.equals("long"))  JVMSig += SIG_LONG ;
                 else if(componentType.equals("float")) JVMSig += SIG_FLOAT ;
                 else if(componentType.equals("double"))  JVMSig += SIG_DOUBLE ;
                 else {
                     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 += ";";
                         }
                     }
                 }
             }
             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 SimpleTypeVisitor8<Name, Void>() {
                 @Override
                 public Name visitArray(ArrayType t, Void p) {
                     return t.getComponentType().accept(this, p);
                 }
                 @Override
                 public Name visitDeclared(DeclaredType t, Void p) {
                     return ((TypeElement) t.asElement()).getQualifiedName();
                 }
                 @Override
                 public Name visitPrimitive(PrimitiveType t, Void p) {
                     return elems.getName(t.toString());
                 }
                 @Override
                 public Name visitNoType(NoType t, Void p) {
                     if (t.getKind() == TypeKind.VOID)
                         return elems.getName("void");
                     return defaultAction(t, p);
                 }
                 @Override
                 public Name visitTypeVariable(TypeVariable t, Void p) {
                     return t.getUpperBound().accept(this, p);
                 }
             };
             return v.visit(type).toString();
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/jvm/JNIWriter.java@af8417e590f4 (annotated)

src/share/classes/com/sun/tools/javac/jvm/JNIWriter.java