Sun, 16 Dec 2012 11:09:36 +0100
8005098: Provide isSynthesized() information on Attribute.Compound
Reviewed-by: jjg
1 /*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javah;
28 import java.io.OutputStream;
29 import java.io.PrintWriter;
30 import java.util.ArrayList;
31 import java.util.List;
32 import javax.lang.model.element.Element;
33 import javax.lang.model.element.ExecutableElement;
34 import javax.lang.model.element.Modifier;
35 import javax.lang.model.element.TypeElement;
36 import javax.lang.model.element.VariableElement;
37 import javax.lang.model.type.ArrayType;
38 import javax.lang.model.type.TypeMirror;
39 import javax.lang.model.util.ElementFilter;
42 /**
43 * Header file generator for JNI.
44 *
45 * <p><b>This is NOT part of any supported API.
46 * If you write code that depends on this, you do so at your own
47 * risk. This code and its internal interfaces are subject to change
48 * or deletion without notice.</b></p>
49 *
50 * @author Sucheta Dambalkar(Revised)
51 */
52 public class JNI extends Gen {
53 JNI(Util util) {
54 super(util);
55 }
57 public String getIncludes() {
58 return "#include <jni.h>";
59 }
61 public void write(OutputStream o, TypeElement clazz) throws Util.Exit {
62 try {
63 String cname = mangler.mangle(clazz.getQualifiedName(), Mangle.Type.CLASS);
64 PrintWriter pw = wrapWriter(o);
65 pw.println(guardBegin(cname));
66 pw.println(cppGuardBegin());
68 /* Write statics. */
69 List<VariableElement> classfields = getAllFields(clazz);
71 for (VariableElement v: classfields) {
72 if (!v.getModifiers().contains(Modifier.STATIC))
73 continue;
74 String s = null;
75 s = defineForStatic(clazz, v);
76 if (s != null) {
77 pw.println(s);
78 }
79 }
81 /* Write methods. */
82 List<ExecutableElement> classmethods = ElementFilter.methodsIn(clazz.getEnclosedElements());
83 for (ExecutableElement md: classmethods) {
84 if(md.getModifiers().contains(Modifier.NATIVE)){
85 TypeMirror mtr = types.erasure(md.getReturnType());
86 String sig = signature(md);
87 TypeSignature newtypesig = new TypeSignature(elems);
88 CharSequence methodName = md.getSimpleName();
89 boolean longName = false;
90 for (ExecutableElement md2: classmethods) {
91 if ((md2 != md)
92 && (methodName.equals(md2.getSimpleName()))
93 && (md2.getModifiers().contains(Modifier.NATIVE)))
94 longName = true;
96 }
97 pw.println("/*");
98 pw.println(" * Class: " + cname);
99 pw.println(" * Method: " +
100 mangler.mangle(methodName, Mangle.Type.FIELDSTUB));
101 pw.println(" * Signature: " + newtypesig.getTypeSignature(sig, mtr));
102 pw.println(" */");
103 pw.println("JNIEXPORT " + jniType(mtr) +
104 " JNICALL " +
105 mangler.mangleMethod(md, clazz,
106 (longName) ?
107 Mangle.Type.METHOD_JNI_LONG :
108 Mangle.Type.METHOD_JNI_SHORT));
109 pw.print(" (JNIEnv *, ");
110 List<? extends VariableElement> paramargs = md.getParameters();
111 List<TypeMirror> args = new ArrayList<TypeMirror>();
112 for (VariableElement p: paramargs) {
113 args.add(types.erasure(p.asType()));
114 }
115 if (md.getModifiers().contains(Modifier.STATIC))
116 pw.print("jclass");
117 else
118 pw.print("jobject");
120 for (TypeMirror arg: args) {
121 pw.print(", ");
122 pw.print(jniType(arg));
123 }
124 pw.println(");" + lineSep);
125 }
126 }
127 pw.println(cppGuardEnd());
128 pw.println(guardEnd(cname));
129 } catch (TypeSignature.SignatureException e) {
130 util.error("jni.sigerror", e.getMessage());
131 }
132 }
135 protected final String jniType(TypeMirror t) throws Util.Exit {
136 TypeElement throwable = elems.getTypeElement("java.lang.Throwable");
137 TypeElement jClass = elems.getTypeElement("java.lang.Class");
138 TypeElement jString = elems.getTypeElement("java.lang.String");
139 Element tclassDoc = types.asElement(t);
142 switch (t.getKind()) {
143 case ARRAY: {
144 TypeMirror ct = ((ArrayType) t).getComponentType();
145 switch (ct.getKind()) {
146 case BOOLEAN: return "jbooleanArray";
147 case BYTE: return "jbyteArray";
148 case CHAR: return "jcharArray";
149 case SHORT: return "jshortArray";
150 case INT: return "jintArray";
151 case LONG: return "jlongArray";
152 case FLOAT: return "jfloatArray";
153 case DOUBLE: return "jdoubleArray";
154 case ARRAY:
155 case DECLARED: return "jobjectArray";
156 default: throw new Error(ct.toString());
157 }
158 }
160 case VOID: return "void";
161 case BOOLEAN: return "jboolean";
162 case BYTE: return "jbyte";
163 case CHAR: return "jchar";
164 case SHORT: return "jshort";
165 case INT: return "jint";
166 case LONG: return "jlong";
167 case FLOAT: return "jfloat";
168 case DOUBLE: return "jdouble";
170 case DECLARED: {
171 if (tclassDoc.equals(jString))
172 return "jstring";
173 else if (types.isAssignable(t, throwable.asType()))
174 return "jthrowable";
175 else if (types.isAssignable(t, jClass.asType()))
176 return "jclass";
177 else
178 return "jobject";
179 }
180 }
182 util.bug("jni.unknown.type");
183 return null; /* dead code. */
184 }
185 }