Almost rewritten to javap: @JavaScriptBody and double/long may not yet be supported
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27 package sun.tools.javap;
32 * Central data repository of the Java Disassembler.
33 * Stores all the information in java class file.
35 * @author Sucheta Dambalkar (Adopted code from jdis)
37 public final class ClassData implements RuntimeConstants {
40 private int minor_version;
41 private int major_version;
42 private int cpool_count;
43 private Object cpool[];
45 private int this_class = 0;;
46 private int super_class;
47 private int interfaces_count;
48 private int[] interfaces = new int[0];;
49 private int fields_count;
50 private FieldData[] fields;
51 private int methods_count;
52 private MethodData[] methods;
53 private InnerClassData[] innerClasses;
54 private int attributes_count;
55 private AttrData[] attrs;
56 private String classname;
57 private String superclassname;
58 private int source_cpx=0;
60 private Hashtable indexHashAscii = new Hashtable();
61 private String pkgPrefix="";
62 private int pkgPrefixLen=0;
65 * Read classfile to disassemble.
67 public ClassData(InputStream infile) throws IOException {
68 this.read(new DataInputStream(infile));
72 * Reads and stores class file information.
74 public void read(DataInputStream in) throws IOException {
77 if (magic != JAVA_MAGIC) {
78 throw new ClassFormatError("wrong magic: " +
79 toHex(magic) + ", expected " +
82 minor_version = in.readShort();
83 major_version = in.readShort();
84 if (major_version != JAVA_VERSION) {
87 // Read the constant pool
89 access = in.readUnsignedShort();
90 this_class = in.readUnsignedShort();
91 super_class = in.readUnsignedShort();
94 interfaces_count = in.readUnsignedShort();
95 if(interfaces_count > 0){
96 interfaces = new int[interfaces_count];
98 for (int i = 0; i < interfaces_count; i++) {
99 interfaces[i]=in.readShort();
108 // Read the attributes
109 attributes_count = in.readUnsignedShort();
110 attrs=new AttrData[attributes_count];
111 for (int k = 0; k < attributes_count; k++) {
112 int name_cpx=in.readUnsignedShort();
113 if (getTag(name_cpx)==CONSTANT_UTF8
114 && getString(name_cpx).equals("SourceFile")
115 ){ if (in.readInt()!=2)
116 throw new ClassFormatError("invalid attr length");
117 source_cpx=in.readUnsignedShort();
118 AttrData attr=new AttrData(this);
122 } else if (getTag(name_cpx)==CONSTANT_UTF8
123 && getString(name_cpx).equals("InnerClasses")
124 ){ int length=in.readInt();
125 int num=in.readUnsignedShort();
126 if (2+num*8 != length)
127 throw new ClassFormatError("invalid attr length");
128 innerClasses=new InnerClassData[num];
129 for (int j = 0; j < num; j++) {
130 InnerClassData innerClass=new InnerClassData(this);
132 innerClasses[j]=innerClass;
134 AttrData attr=new AttrData(this);
138 AttrData attr=new AttrData(this);
139 attr.read(name_cpx, in);
144 } // end ClassData.read()
147 * Reads and stores constant pool info.
149 void readCP(DataInputStream in) throws IOException {
150 cpool_count = in.readUnsignedShort();
151 tags = new byte[cpool_count];
152 cpool = new Object[cpool_count];
153 for (int i = 1; i < cpool_count; i++) {
154 byte tag = in.readByte();
156 switch(tags[i] = tag) {
158 String str=in.readUTF();
159 indexHashAscii.put(cpool[i] = str, new Integer(i));
161 case CONSTANT_INTEGER:
162 cpool[i] = new Integer(in.readInt());
165 cpool[i] = new Float(in.readFloat());
168 cpool[i++] = new Long(in.readLong());
170 case CONSTANT_DOUBLE:
171 cpool[i++] = new Double(in.readDouble());
174 case CONSTANT_STRING:
175 cpool[i] = new CPX(in.readUnsignedShort());
179 case CONSTANT_METHOD:
180 case CONSTANT_INTERFACEMETHOD:
181 case CONSTANT_NAMEANDTYPE:
182 cpool[i] = new CPX2(in.readUnsignedShort(), in.readUnsignedShort());
187 throw new ClassFormatError("invalid constant type: " + (int)tags[i]);
193 * Reads and strores field info.
195 protected void readFields(DataInputStream in) throws IOException {
196 int fields_count = in.readUnsignedShort();
197 fields=new FieldData[fields_count];
198 for (int k = 0; k < fields_count; k++) {
199 FieldData field=new FieldData(this);
206 * Reads and strores Method info.
208 protected void readMethods(DataInputStream in) throws IOException {
209 int methods_count = in.readUnsignedShort();
210 methods=new MethodData[methods_count];
211 for (int k = 0; k < methods_count ; k++) {
212 MethodData method=new MethodData(this);
221 public String getString(int n) {
225 return (String)cpool[n];
230 * get the type of constant given an index
232 public byte getTag(int n) {
235 } catch (ArrayIndexOutOfBoundsException e) {
240 static final String hexString="0123456789ABCDEF";
242 public static char hexTable[]=hexString.toCharArray();
244 static String toHex(long val, int width) {
245 StringBuffer s = new StringBuffer();
246 for (int i=width-1; i>=0; i--)
247 s.append(hexTable[((int)(val>>(4*i)))&0xF]);
248 return "0x"+s.toString();
251 static String toHex(long val) {
253 for (width=16; width>0; width--) {
254 if ((val>>(width-1)*4)!=0) break;
256 return toHex(val, width);
259 static String toHex(int val) {
261 for (width=8; width>0; width--) {
262 if ((val>>(width-1)*4)!=0) break;
264 return toHex(val, width);
268 * Returns the name of this class.
270 public String getClassName() {
277 if (tags[this_class]!=CONSTANT_CLASS) {
278 return res; //"<CP["+cpx+"] is not a Class> ";
280 tcpx=((CPX)cpool[this_class]).cpx;
281 } catch (ArrayIndexOutOfBoundsException e) {
282 return res; // "#"+cpx+"// invalid constant pool index";
283 } catch (Throwable e) {
284 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
288 return (String)(cpool[tcpx]);
289 } catch (ArrayIndexOutOfBoundsException e) {
290 return res; // "class #"+scpx+"// invalid constant pool index";
291 } catch (ClassCastException e) {
292 return res; // "class #"+scpx+"// invalid constant pool reference";
293 } catch (Throwable e) {
294 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
300 * Returns the name of class at perticular index.
302 public String getClassName(int cpx) {
309 if (tags[cpx]!=CONSTANT_CLASS) {
310 return res; //"<CP["+cpx+"] is not a Class> ";
312 scpx=((CPX)cpool[cpx]).cpx;
313 } catch (ArrayIndexOutOfBoundsException e) {
314 return res; // "#"+cpx+"// invalid constant pool index";
315 } catch (Throwable e) {
316 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
320 return (String)(cpool[scpx]);
321 } catch (ArrayIndexOutOfBoundsException e) {
322 return res; // "class #"+scpx+"// invalid constant pool index";
323 } catch (ClassCastException e) {
324 return res; // "class #"+scpx+"// invalid constant pool reference";
325 } catch (Throwable e) {
326 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
331 * Returns true if it is a class
333 public boolean isClass() {
334 if((access & ACC_INTERFACE) == 0) return true;
339 * Returns true if it is a interface.
341 public boolean isInterface(){
342 if((access & ACC_INTERFACE) != 0) return true;
347 * Returns true if this member is public, false otherwise.
349 public boolean isPublic(){
350 return (access & ACC_PUBLIC) != 0;
354 * Returns the access of this class or interface.
356 public String[] getAccess(){
357 Vector v = new Vector();
358 if ((access & ACC_PUBLIC) !=0) v.addElement("public");
359 if ((access & ACC_FINAL) !=0) v.addElement("final");
360 if ((access & ACC_ABSTRACT) !=0) v.addElement("abstract");
361 String[] accflags = new String[v.size()];
362 v.copyInto(accflags);
367 * Returns list of innerclasses.
369 public InnerClassData[] getInnerClasses(){
374 * Returns list of attributes.
376 public AttrData[] getAttributes(){
381 * Returns true if superbit is set.
383 public boolean isSuperSet(){
384 if ((access & ACC_SUPER) !=0) return true;
389 * Returns super class name.
391 public String getSuperClassName(){
393 if (super_class==0) {
398 if (tags[super_class]!=CONSTANT_CLASS) {
399 return res; //"<CP["+cpx+"] is not a Class> ";
401 scpx=((CPX)cpool[super_class]).cpx;
402 } catch (ArrayIndexOutOfBoundsException e) {
403 return res; // "#"+cpx+"// invalid constant pool index";
404 } catch (Throwable e) {
405 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
409 return (String)(cpool[scpx]);
410 } catch (ArrayIndexOutOfBoundsException e) {
411 return res; // "class #"+scpx+"// invalid constant pool index";
412 } catch (ClassCastException e) {
413 return res; // "class #"+scpx+"// invalid constant pool reference";
414 } catch (Throwable e) {
415 return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
420 * Returns list of super interfaces.
422 public String[] getSuperInterfaces(){
423 String interfacenames[] = new String[interfaces.length];
424 int interfacecpx = -1;
425 for(int i = 0; i < interfaces.length; i++){
426 interfacecpx=((CPX)cpool[interfaces[i]]).cpx;
427 interfacenames[i] = (String)(cpool[interfacecpx]);
429 return interfacenames;
433 * Returns string at prticular constant pool index.
435 public String getStringValue(int cpoolx) {
437 return ((String)cpool[cpoolx]);
438 } catch (ArrayIndexOutOfBoundsException e) {
439 return "//invalid constant pool index:"+cpoolx;
440 } catch (ClassCastException e) {
441 return "//invalid constant pool ref:"+cpoolx;
446 * Returns list of field info.
448 public FieldData[] getFields(){
453 * Returns list of method info.
455 public MethodData[] getMethods(){
460 * Returns constant pool entry at that index.
462 public CPX2 getCpoolEntry(int cpx){
463 return ((CPX2)(cpool[cpx]));
466 public Object getCpoolEntryobj(int cpx){
471 * Returns index of this class.
473 public int getthis_cpx(){
477 public String TagString (int tag) {
478 String res=Tables.tagName(tag);
479 if (res==null) return "BOGUS_TAG:"+tag;
484 * Returns string at that index.
486 public String StringValue(int cpx) {
487 return stringValue(cpx, false);
489 public String stringValue(int cpx, boolean textual) {
490 if (cpx==0) return "#0";
497 } catch (IndexOutOfBoundsException e) {
498 return "<Incorrect CP index:"+cpx+">";
501 if (x==null) return "<NULL>";
503 case CONSTANT_UTF8: {
504 StringBuffer sb=new StringBuffer();
506 for (int k=0; k<s.length(); k++) {
509 case '\t': sb.append('\\').append('t'); break;
510 case '\n': sb.append('\\').append('n'); break;
511 case '\r': sb.append('\\').append('r'); break;
512 case '\"': sb.append('\\').append('\"'); break;
513 default: sb.append(c);
516 return sb.toString();
518 case CONSTANT_DOUBLE: {
520 String sd=d.toString();
526 case CONSTANT_FLOAT: {
528 String sf=(f).toString();
534 case CONSTANT_LONG: {
537 return ln.toString();
539 return ln.toString()+'l';
541 case CONSTANT_INTEGER: {
542 Integer in = (Integer)x;
543 return in.toString();
547 return "new java_lang_Class"; // XXX temporary JS
549 return javaName(getClassName(cpx));
550 case CONSTANT_STRING:
551 String sv = StringValue(((CPX)x).cpx);
553 return '"' + sv + '"';
558 case CONSTANT_METHOD:
559 case CONSTANT_INTERFACEMETHOD:
560 //return getShortClassName(((CPX2)x).cpx1)+"."+StringValue(((CPX2)x).cpx2);
561 return javaName(getClassName(((CPX2)x).cpx1))+"."+StringValue(((CPX2)x).cpx2);
563 case CONSTANT_NAMEANDTYPE:
564 return getName(((CPX2)x).cpx1)+":"+StringValue(((CPX2)x).cpx2);
566 return "UnknownTag"; //TBD
571 * Returns resolved java type name.
573 public String javaName(String name) {
574 if( name==null) return "null";
575 int len=name.length();
576 if (len==0) return "\"\"";
578 fullname: { // xxx/yyy/zzz
580 for (int k=0; k<len; k += Character.charCount(cp)) {
581 cp=name.codePointAt(k);
583 if (!isJavaIdentifierStart(cp)) break fullname;
584 } else if (cp!='/') {
585 if (!isJavaIdentifierPart(cp)) break fullname;
591 return "\""+name+"\"";
594 public String getName(int cpx) {
597 return javaName((String)cpool[cpx]); //.replace('/','.');
598 } catch (ArrayIndexOutOfBoundsException e) {
599 return "<invalid constant pool index:"+cpx+">";
600 } catch (ClassCastException e) {
601 return "<invalid constant pool ref:"+cpx+">";
606 * Returns unqualified class name.
608 public String getShortClassName(int cpx) {
609 String classname=javaName(getClassName(cpx));
610 pkgPrefixLen=classname.lastIndexOf("/")+1;
611 if (pkgPrefixLen!=0) {
612 pkgPrefix=classname.substring(0,pkgPrefixLen);
613 if (classname.startsWith(pkgPrefix)) {
614 return classname.substring(pkgPrefixLen);
621 * Returns source file name.
623 public String getSourceName(){
624 return getName(source_cpx);
628 * Returns package name.
630 public String getPkgName(){
631 String classname=getClassName(this_class);
632 pkgPrefixLen=classname.lastIndexOf("/")+1;
633 if (pkgPrefixLen!=0) {
634 pkgPrefix=classname.substring(0,pkgPrefixLen);
635 return("package "+pkgPrefix.substring(0,pkgPrefixLen-1)+";\n");
640 * Returns total constant pool entry count.
642 public int getCpoolCount(){
646 public String StringTag(int cpx) {
650 if (cpx==0) throw new IndexOutOfBoundsException();
652 return TagString(tag);
653 } catch (IndexOutOfBoundsException e) {
654 str="Incorrect CP index:"+cpx;
660 * Returns minor version of class file.
662 public int getMinor_version(){
663 return minor_version;
667 * Returns major version of class file.
669 public int getMajor_version(){
670 return major_version;
673 private boolean isJavaIdentifierStart(int cp) {
674 return ('a' <= cp && cp <= 'z') || ('A' <= cp && cp <= 'Z');
677 private boolean isJavaIdentifierPart(int cp) {
678 return isJavaIdentifierStart(cp) || ('0' <= cp && cp <= '9');
681 public String[] getNameAndType(int indx) {
682 return getNameAndType(indx, 0, new String[2]);
685 private String[] getNameAndType(int indx, int at, String[] arr) {
686 CPX2 c2 = getCpoolEntry(indx);
687 arr[at] = StringValue(c2.cpx1);
688 arr[at + 1] = StringValue(c2.cpx2);
692 public String[] getFieldInfoName(int indx) {
693 CPX2 c2 = getCpoolEntry(indx);
694 String[] arr = new String[3];
695 arr[0] = getClassName(c2.cpx1);
696 return getNameAndType(c2.cpx2, 1, arr);