src/share/classes/jdk/internal/org/objectweb/asm/util/CheckClassAdapter.java
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@@ -73,10 +73,12 @@
import jdk.internal.org.objectweb.asm.FieldVisitor;
import jdk.internal.org.objectweb.asm.Label;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.Type;
+import jdk.internal.org.objectweb.asm.TypePath;
+import jdk.internal.org.objectweb.asm.TypeReference;
import jdk.internal.org.objectweb.asm.tree.ClassNode;
import jdk.internal.org.objectweb.asm.tree.MethodNode;
import jdk.internal.org.objectweb.asm.tree.analysis.Analyzer;
import jdk.internal.org.objectweb.asm.tree.analysis.BasicValue;
import jdk.internal.org.objectweb.asm.tree.analysis.Frame;
@@ -86,14 +88,14 @@
* A {@link ClassVisitor} that checks that its methods are properly used. More
* precisely this class adapter checks each method call individually, based
* <i>only</i> on its arguments, but does <i>not</i> check the <i>sequence</i>
* of method calls. For example, the invalid sequence
* <tt>visitField(ACC_PUBLIC, "i", "I", null)</tt> <tt>visitField(ACC_PUBLIC,
- * "i", "D", null)</tt>
- * will <i>not</i> be detected by this class adapter.
+ * "i", "D", null)</tt> will <i>not</i> be detected by this class adapter.
*
- * <p><code>CheckClassAdapter</code> can be also used to verify bytecode
+ * <p>
+ * <code>CheckClassAdapter</code> can be also used to verify bytecode
* transformations in order to make sure transformed bytecode is sane. For
* example:
*
* <pre>
* InputStream is = ...; // get bytes for the source class
@@ -107,15 +109,16 @@
* CheckClassAdapter.verify(new ClassReader(cw.toByteArray()), false, pw);
* assertTrue(sw.toString(), sw.toString().length()==0);
* </pre>
*
* Above code runs transformed bytecode trough the
- * <code>CheckClassAdapter</code>. It won't be exactly the same verification
- * as JVM does, but it run data flow analysis for the code of each method and
+ * <code>CheckClassAdapter</code>. It won't be exactly the same verification as
+ * JVM does, but it run data flow analysis for the code of each method and
* checks that expectations are met for each method instruction.
*
- * <p>If method bytecode has errors, assertion text will show the erroneous
+ * <p>
+ * If method bytecode has errors, assertion text will show the erroneous
* instruction number and dump of the failed method with information about
* locals and stack slot for each instruction. For example (format is -
* insnNumber locals : stack):
*
* <pre>
@@ -132,21 +135,22 @@
* ...
*
* 00071 LinkedBlockingQueue$Itr <b>.</b> I . . . . . . :
* ILOAD 1
* 00072 <b>?</b>
- * INVOKESPECIAL java/lang/Integer.<init> (I)V
+ * INVOKESPECIAL java/lang/Integer.<init> (I)V
* ...
* </pre>
*
* In the above output you can see that variable 1 loaded by
* <code>ILOAD 1</code> instruction at position <code>00071</code> is not
* initialized. You can also see that at the beginning of the method (code
* inserted by the transformation) variable 2 is initialized.
*
- * <p>Note that when used like that, <code>CheckClassAdapter.verify()</code>
- * can trigger additional class loading, because it is using
+ * <p>
+ * Note that when used like that, <code>CheckClassAdapter.verify()</code> can
+ * trigger additional class loading, because it is using
* <code>SimpleVerifier</code>.
*
* @author Eric Bruneton
*/
public class CheckClassAdapter extends ClassVisitor {
@@ -186,17 +190,19 @@
* <tt>true</tt> if the method code must be checked with a BasicVerifier.
*/
private boolean checkDataFlow;
/**
- * Checks a given class. <p> Usage: CheckClassAdapter <binary
- * class name or class file name>
+ * Checks a given class.
+ * <p>
+ * Usage: CheckClassAdapter <binary class name or class file name>
*
- * @param args the command line arguments.
+ * @param args
+ * the command line arguments.
*
- * @throws Exception if the class cannot be found, or if an IO exception
- * occurs.
+ * @throws Exception
+ * if the class cannot be found, or if an IO exception occurs.
*/
public static void main(final String[] args) throws Exception {
if (args.length != 1) {
System.err.println("Verifies the given class.");
System.err.println("Usage: CheckClassAdapter "
@@ -214,43 +220,41 @@
}
/**
* Checks a given class.
*
- * @param cr a <code>ClassReader</code> that contains bytecode for the
+ * @param cr
+ * a <code>ClassReader</code> that contains bytecode for the
* analysis.
- * @param loader a <code>ClassLoader</code> which will be used to load
- * referenced classes. This is useful if you are verifiying multiple
- * interdependent classes.
- * @param dump true if bytecode should be printed out not only when errors
+ * @param loader
+ * a <code>ClassLoader</code> which will be used to load
+ * referenced classes. This is useful if you are verifiying
+ * multiple interdependent classes.
+ * @param dump
+ * true if bytecode should be printed out not only when errors
* are found.
- * @param pw write where results going to be printed
+ * @param pw
+ * write where results going to be printed
*/
- public static void verify(
- final ClassReader cr,
- final ClassLoader loader,
- final boolean dump,
- final PrintWriter pw)
- {
+ public static void verify(final ClassReader cr, final ClassLoader loader,
+ final boolean dump, final PrintWriter pw) {
ClassNode cn = new ClassNode();
cr.accept(new CheckClassAdapter(cn, false), ClassReader.SKIP_DEBUG);
- Type syperType = cn.superName == null
- ? null
- : Type.getObjectType(cn.superName);
+ Type syperType = cn.superName == null ? null : Type
+ .getObjectType(cn.superName);
List<MethodNode> methods = cn.methods;
List<Type> interfaces = new ArrayList<Type>();
for (Iterator<String> i = cn.interfaces.iterator(); i.hasNext();) {
interfaces.add(Type.getObjectType(i.next().toString()));
}
for (int i = 0; i < methods.size(); ++i) {
MethodNode method = methods.get(i);
- SimpleVerifier verifier = new SimpleVerifier(Type.getObjectType(cn.name),
- syperType,
- interfaces,
+ SimpleVerifier verifier = new SimpleVerifier(
+ Type.getObjectType(cn.name), syperType, interfaces,
(cn.access & Opcodes.ACC_INTERFACE) != 0);
Analyzer<BasicValue> a = new Analyzer<BasicValue>(verifier);
if (loader != null) {
verifier.setClassLoader(loader);
}
@@ -268,29 +272,26 @@
}
/**
* Checks a given class
*
- * @param cr a <code>ClassReader</code> that contains bytecode for the
+ * @param cr
+ * a <code>ClassReader</code> that contains bytecode for the
* analysis.
- * @param dump true if bytecode should be printed out not only when errors
+ * @param dump
+ * true if bytecode should be printed out not only when errors
* are found.
- * @param pw write where results going to be printed
+ * @param pw
+ * write where results going to be printed
*/
- public static void verify(
- final ClassReader cr,
- final boolean dump,
- final PrintWriter pw)
- {
+ public static void verify(final ClassReader cr, final boolean dump,
+ final PrintWriter pw) {
verify(cr, null, dump, pw);
}
- static void printAnalyzerResult(
- MethodNode method,
- Analyzer<BasicValue> a,
- final PrintWriter pw)
- {
+ static void printAnalyzerResult(MethodNode method, Analyzer<BasicValue> a,
+ final PrintWriter pw) {
Frame<BasicValue>[] frames = a.getFrames();
Textifier t = new Textifier();
TraceMethodVisitor mv = new TraceMethodVisitor(t);
pw.println(method.name + method.desc);
@@ -337,11 +338,12 @@
/**
* Constructs a new {@link CheckClassAdapter}. <i>Subclasses must not use
* this constructor</i>. Instead, they must use the
* {@link #CheckClassAdapter(int, ClassVisitor, boolean)} version.
*
- * @param cv the class visitor to which this adapter must delegate calls.
+ * @param cv
+ * the class visitor to which this adapter must delegate calls.
*/
public CheckClassAdapter(final ClassVisitor cv) {
this(cv, true);
}
@@ -348,37 +350,38 @@
/**
* Constructs a new {@link CheckClassAdapter}. <i>Subclasses must not use
* this constructor</i>. Instead, they must use the
* {@link #CheckClassAdapter(int, ClassVisitor, boolean)} version.
*
- * @param cv the class visitor to which this adapter must delegate calls.
- * @param checkDataFlow <tt>true</tt> to perform basic data flow checks, or
+ * @param cv
+ * the class visitor to which this adapter must delegate calls.
+ * @param checkDataFlow
+ * <tt>true</tt> to perform basic data flow checks, or
* <tt>false</tt> to not perform any data flow check (see
- * {@link CheckMethodAdapter}). This option requires valid maxLocals
- * and maxStack values.
+ * {@link CheckMethodAdapter}). This option requires valid
+ * maxLocals and maxStack values.
*/
- public CheckClassAdapter(final ClassVisitor cv, final boolean checkDataFlow)
- {
- this(Opcodes.ASM4, cv, checkDataFlow);
+ public CheckClassAdapter(final ClassVisitor cv, final boolean checkDataFlow) {
+ this(Opcodes.ASM5, cv, checkDataFlow);
}
/**
* Constructs a new {@link CheckClassAdapter}.
*
- * @param api the ASM API version implemented by this visitor. Must be one
- * of {@link Opcodes#ASM4}.
- * @param cv the class visitor to which this adapter must delegate calls.
- * @param checkDataFlow <tt>true</tt> to perform basic data flow checks, or
+ * @param api
+ * the ASM API version implemented by this visitor. Must be one
+ * of {@link Opcodes#ASM4} or {@link Opcodes#ASM5}.
+ * @param cv
+ * the class visitor to which this adapter must delegate calls.
+ * @param checkDataFlow
+ * <tt>true</tt> to perform basic data flow checks, or
* <tt>false</tt> to not perform any data flow check (see
- * {@link CheckMethodAdapter}). This option requires valid maxLocals
- * and maxStack values.
+ * {@link CheckMethodAdapter}). This option requires valid
+ * maxLocals and maxStack values.
*/
- protected CheckClassAdapter(
- final int api,
- final ClassVisitor cv,
- final boolean checkDataFlow)
- {
+ protected CheckClassAdapter(final int api, final ClassVisitor cv,
+ final boolean checkDataFlow) {
super(api, cv);
this.labels = new HashMap<Label, Integer>();
this.checkDataFlow = checkDataFlow;
}
@@ -385,45 +388,41 @@
// ------------------------------------------------------------------------
// Implementation of the ClassVisitor interface
// ------------------------------------------------------------------------
@Override
- public void visit(
- final int version,
- final int access,
- final String name,
- final String signature,
- final String superName,
- final String[] interfaces)
- {
+ public void visit(final int version, final int access, final String name,
+ final String signature, final String superName,
+ final String[] interfaces) {
if (start) {
throw new IllegalStateException("visit must be called only once");
}
start = true;
checkState();
checkAccess(access, Opcodes.ACC_PUBLIC + Opcodes.ACC_FINAL
+ Opcodes.ACC_SUPER + Opcodes.ACC_INTERFACE
+ Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC
+ Opcodes.ACC_ANNOTATION + Opcodes.ACC_ENUM
- + Opcodes.ACC_DEPRECATED
- + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
+ + Opcodes.ACC_DEPRECATED + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
if (name == null || !name.endsWith("package-info")) {
CheckMethodAdapter.checkInternalName(name, "class name");
}
if ("java/lang/Object".equals(name)) {
if (superName != null) {
- throw new IllegalArgumentException("The super class name of the Object class must be 'null'");
+ throw new IllegalArgumentException(
+ "The super class name of the Object class must be 'null'");
}
} else {
CheckMethodAdapter.checkInternalName(superName, "super class name");
}
if (signature != null) {
- CheckMethodAdapter.checkClassSignature(signature);
+ checkClassSignature(signature);
}
if ((access & Opcodes.ACC_INTERFACE) != 0) {
if (!"java/lang/Object".equals(superName)) {
- throw new IllegalArgumentException("The super class name of interfaces must be 'java/lang/Object'");
+ throw new IllegalArgumentException(
+ "The super class name of interfaces must be 'java/lang/Object'");
}
}
if (interfaces != null) {
for (int i = 0; i < interfaces.length; ++i) {
CheckMethodAdapter.checkInternalName(interfaces[i],
@@ -436,25 +435,24 @@
@Override
public void visitSource(final String file, final String debug) {
checkState();
if (source) {
- throw new IllegalStateException("visitSource can be called only once.");
+ throw new IllegalStateException(
+ "visitSource can be called only once.");
}
source = true;
super.visitSource(file, debug);
}
@Override
- public void visitOuterClass(
- final String owner,
- final String name,
- final String desc)
- {
+ public void visitOuterClass(final String owner, final String name,
+ final String desc) {
checkState();
if (outer) {
- throw new IllegalStateException("visitOuterClass can be called only once.");
+ throw new IllegalStateException(
+ "visitOuterClass can be called only once.");
}
outer = true;
if (owner == null) {
throw new IllegalArgumentException("Illegal outer class owner");
}
@@ -463,16 +461,12 @@
}
super.visitOuterClass(owner, name, desc);
}
@Override
- public void visitInnerClass(
- final String name,
- final String outerName,
- final String innerName,
- final int access)
- {
+ public void visitInnerClass(final String name, final String outerName,
+ final String innerName, final int access) {
checkState();
CheckMethodAdapter.checkInternalName(name, "class name");
if (outerName != null) {
CheckMethodAdapter.checkInternalName(outerName, "outer class name");
}
@@ -486,96 +480,98 @@
+ Opcodes.ACC_ANNOTATION + Opcodes.ACC_ENUM);
super.visitInnerClass(name, outerName, innerName, access);
}
@Override
- public FieldVisitor visitField(
- final int access,
- final String name,
- final String desc,
- final String signature,
- final Object value)
- {
+ public FieldVisitor visitField(final int access, final String name,
+ final String desc, final String signature, final Object value) {
checkState();
checkAccess(access, Opcodes.ACC_PUBLIC + Opcodes.ACC_PRIVATE
+ Opcodes.ACC_PROTECTED + Opcodes.ACC_STATIC
+ Opcodes.ACC_FINAL + Opcodes.ACC_VOLATILE
+ Opcodes.ACC_TRANSIENT + Opcodes.ACC_SYNTHETIC
- + Opcodes.ACC_ENUM + Opcodes.ACC_DEPRECATED
- + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
+ + Opcodes.ACC_ENUM + Opcodes.ACC_DEPRECATED + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
CheckMethodAdapter.checkUnqualifiedName(version, name, "field name");
CheckMethodAdapter.checkDesc(desc, false);
if (signature != null) {
- CheckMethodAdapter.checkFieldSignature(signature);
+ checkFieldSignature(signature);
}
if (value != null) {
CheckMethodAdapter.checkConstant(value);
}
- FieldVisitor av = super.visitField(access, name, desc, signature, value);
+ FieldVisitor av = super
+ .visitField(access, name, desc, signature, value);
return new CheckFieldAdapter(av);
}
@Override
- public MethodVisitor visitMethod(
- final int access,
- final String name,
- final String desc,
- final String signature,
- final String[] exceptions)
- {
+ public MethodVisitor visitMethod(final int access, final String name,
+ final String desc, final String signature, final String[] exceptions) {
checkState();
checkAccess(access, Opcodes.ACC_PUBLIC + Opcodes.ACC_PRIVATE
+ Opcodes.ACC_PROTECTED + Opcodes.ACC_STATIC
+ Opcodes.ACC_FINAL + Opcodes.ACC_SYNCHRONIZED
+ Opcodes.ACC_BRIDGE + Opcodes.ACC_VARARGS + Opcodes.ACC_NATIVE
+ Opcodes.ACC_ABSTRACT + Opcodes.ACC_STRICT
- + Opcodes.ACC_SYNTHETIC + Opcodes.ACC_DEPRECATED
- + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
- CheckMethodAdapter.checkMethodIdentifier(version, name, "method name");
+ + Opcodes.ACC_SYNTHETIC + Opcodes.ACC_DEPRECATED + 0x40000); // ClassWriter.ACC_SYNTHETIC_ATTRIBUTE
+ if (!"<init>".equals(name) && !"<clinit>".equals(name)) {
+ CheckMethodAdapter.checkMethodIdentifier(version, name,
+ "method name");
+ }
CheckMethodAdapter.checkMethodDesc(desc);
if (signature != null) {
- CheckMethodAdapter.checkMethodSignature(signature);
+ checkMethodSignature(signature);
}
if (exceptions != null) {
for (int i = 0; i < exceptions.length; ++i) {
CheckMethodAdapter.checkInternalName(exceptions[i],
"exception name at index " + i);
}
}
CheckMethodAdapter cma;
if (checkDataFlow) {
- cma = new CheckMethodAdapter(access,
- name,
- desc,
- super.visitMethod(access, name, desc, signature, exceptions),
- labels);
+ cma = new CheckMethodAdapter(access, name, desc, super.visitMethod(
+ access, name, desc, signature, exceptions), labels);
} else {
- cma = new CheckMethodAdapter(super.visitMethod(access,
- name,
- desc,
- signature,
- exceptions), labels);
+ cma = new CheckMethodAdapter(super.visitMethod(access, name, desc,
+ signature, exceptions), labels);
}
cma.version = version;
return cma;
}
@Override
- public AnnotationVisitor visitAnnotation(
- final String desc,
- final boolean visible)
- {
+ public AnnotationVisitor visitAnnotation(final String desc,
+ final boolean visible) {
checkState();
CheckMethodAdapter.checkDesc(desc, false);
return new CheckAnnotationAdapter(super.visitAnnotation(desc, visible));
}
@Override
+ public AnnotationVisitor visitTypeAnnotation(final int typeRef,
+ final TypePath typePath, final String desc, final boolean visible) {
+ checkState();
+ int sort = typeRef >>> 24;
+ if (sort != TypeReference.CLASS_TYPE_PARAMETER
+ && sort != TypeReference.CLASS_TYPE_PARAMETER_BOUND
+ && sort != TypeReference.CLASS_EXTENDS) {
+ throw new IllegalArgumentException("Invalid type reference sort 0x"
+ + Integer.toHexString(sort));
+ }
+ checkTypeRefAndPath(typeRef, typePath);
+ CheckMethodAdapter.checkDesc(desc, false);
+ return new CheckAnnotationAdapter(super.visitTypeAnnotation(typeRef,
+ typePath, desc, visible));
+ }
+
+ @Override
public void visitAttribute(final Attribute attr) {
checkState();
if (attr == null) {
- throw new IllegalArgumentException("Invalid attribute (must not be null)");
+ throw new IllegalArgumentException(
+ "Invalid attribute (must not be null)");
}
super.visitAttribute(attr);
}
@Override
@@ -593,24 +589,28 @@
* Checks that the visit method has been called and that visitEnd has not
* been called.
*/
private void checkState() {
if (!start) {
- throw new IllegalStateException("Cannot visit member before visit has been called.");
+ throw new IllegalStateException(
+ "Cannot visit member before visit has been called.");
}
if (end) {
- throw new IllegalStateException("Cannot visit member after visitEnd has been called.");
+ throw new IllegalStateException(
+ "Cannot visit member after visitEnd has been called.");
}
}
/**
* Checks that the given access flags do not contain invalid flags. This
* method also checks that mutually incompatible flags are not set
* simultaneously.
*
- * @param access the access flags to be checked
- * @param possibleAccess the valid access flags.
+ * @param access
+ * the access flags to be checked
+ * @param possibleAccess
+ * the valid access flags.
*/
static void checkAccess(final int access, final int possibleAccess) {
if ((access & ~possibleAccess) != 0) {
throw new IllegalArgumentException("Invalid access flags: "
+ access);
@@ -617,16 +617,409 @@
}
int pub = (access & Opcodes.ACC_PUBLIC) == 0 ? 0 : 1;
int pri = (access & Opcodes.ACC_PRIVATE) == 0 ? 0 : 1;
int pro = (access & Opcodes.ACC_PROTECTED) == 0 ? 0 : 1;
if (pub + pri + pro > 1) {
- throw new IllegalArgumentException("public private and protected are mutually exclusive: "
+ throw new IllegalArgumentException(
+ "public private and protected are mutually exclusive: "
+ access);
}
int fin = (access & Opcodes.ACC_FINAL) == 0 ? 0 : 1;
int abs = (access & Opcodes.ACC_ABSTRACT) == 0 ? 0 : 1;
if (fin + abs > 1) {
- throw new IllegalArgumentException("final and abstract are mutually exclusive: "
- + access);
+ throw new IllegalArgumentException(
+ "final and abstract are mutually exclusive: " + access);
}
}
+
+ /**
+ * Checks a class signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ */
+ public static void checkClassSignature(final String signature) {
+ // ClassSignature:
+ // FormalTypeParameters? ClassTypeSignature ClassTypeSignature*
+
+ int pos = 0;
+ if (getChar(signature, 0) == '<') {
+ pos = checkFormalTypeParameters(signature, pos);
+ }
+ pos = checkClassTypeSignature(signature, pos);
+ while (getChar(signature, pos) == 'L') {
+ pos = checkClassTypeSignature(signature, pos);
+ }
+ if (pos != signature.length()) {
+ throw new IllegalArgumentException(signature + ": error at index "
+ + pos);
+ }
+ }
+
+ /**
+ * Checks a method signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ */
+ public static void checkMethodSignature(final String signature) {
+ // MethodTypeSignature:
+ // FormalTypeParameters? ( TypeSignature* ) ( TypeSignature | V ) (
+ // ^ClassTypeSignature | ^TypeVariableSignature )*
+
+ int pos = 0;
+ if (getChar(signature, 0) == '<') {
+ pos = checkFormalTypeParameters(signature, pos);
+ }
+ pos = checkChar('(', signature, pos);
+ while ("ZCBSIFJDL[T".indexOf(getChar(signature, pos)) != -1) {
+ pos = checkTypeSignature(signature, pos);
+ }
+ pos = checkChar(')', signature, pos);
+ if (getChar(signature, pos) == 'V') {
+ ++pos;
+ } else {
+ pos = checkTypeSignature(signature, pos);
+ }
+ while (getChar(signature, pos) == '^') {
+ ++pos;
+ if (getChar(signature, pos) == 'L') {
+ pos = checkClassTypeSignature(signature, pos);
+ } else {
+ pos = checkTypeVariableSignature(signature, pos);
+ }
+ }
+ if (pos != signature.length()) {
+ throw new IllegalArgumentException(signature + ": error at index "
+ + pos);
+ }
+ }
+
+ /**
+ * Checks a field signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ */
+ public static void checkFieldSignature(final String signature) {
+ int pos = checkFieldTypeSignature(signature, 0);
+ if (pos != signature.length()) {
+ throw new IllegalArgumentException(signature + ": error at index "
+ + pos);
+ }
+ }
+
+ /**
+ * Checks the reference to a type in a type annotation.
+ *
+ * @param typeRef
+ * a reference to an annotated type.
+ * @param typePath
+ * the path to the annotated type argument, wildcard bound, array
+ * element type, or static inner type within 'typeRef'. May be
+ * <tt>null</tt> if the annotation targets 'typeRef' as a whole.
+ */
+ static void checkTypeRefAndPath(int typeRef, TypePath typePath) {
+ int mask = 0;
+ switch (typeRef >>> 24) {
+ case TypeReference.CLASS_TYPE_PARAMETER:
+ case TypeReference.METHOD_TYPE_PARAMETER:
+ case TypeReference.METHOD_FORMAL_PARAMETER:
+ mask = 0xFFFF0000;
+ break;
+ case TypeReference.FIELD:
+ case TypeReference.METHOD_RETURN:
+ case TypeReference.METHOD_RECEIVER:
+ case TypeReference.LOCAL_VARIABLE:
+ case TypeReference.RESOURCE_VARIABLE:
+ case TypeReference.INSTANCEOF:
+ case TypeReference.NEW:
+ case TypeReference.CONSTRUCTOR_REFERENCE:
+ case TypeReference.METHOD_REFERENCE:
+ mask = 0xFF000000;
+ break;
+ case TypeReference.CLASS_EXTENDS:
+ case TypeReference.CLASS_TYPE_PARAMETER_BOUND:
+ case TypeReference.METHOD_TYPE_PARAMETER_BOUND:
+ case TypeReference.THROWS:
+ case TypeReference.EXCEPTION_PARAMETER:
+ mask = 0xFFFFFF00;
+ break;
+ case TypeReference.CAST:
+ case TypeReference.CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
+ case TypeReference.METHOD_INVOCATION_TYPE_ARGUMENT:
+ case TypeReference.CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
+ case TypeReference.METHOD_REFERENCE_TYPE_ARGUMENT:
+ mask = 0xFF0000FF;
+ break;
+ default:
+ throw new IllegalArgumentException("Invalid type reference sort 0x"
+ + Integer.toHexString(typeRef >>> 24));
+ }
+ if ((typeRef & ~mask) != 0) {
+ throw new IllegalArgumentException("Invalid type reference 0x"
+ + Integer.toHexString(typeRef));
+ }
+ if (typePath != null) {
+ for (int i = 0; i < typePath.getLength(); ++i) {
+ int step = typePath.getStep(i);
+ if (step != TypePath.ARRAY_ELEMENT
+ && step != TypePath.INNER_TYPE
+ && step != TypePath.TYPE_ARGUMENT
+ && step != TypePath.WILDCARD_BOUND) {
+ throw new IllegalArgumentException(
+ "Invalid type path step " + i + " in " + typePath);
+ }
+ if (step != TypePath.TYPE_ARGUMENT
+ && typePath.getStepArgument(i) != 0) {
+ throw new IllegalArgumentException(
+ "Invalid type path step argument for step " + i
+ + " in " + typePath);
+ }
+ }
+ }
+ }
+
+ /**
+ * Checks the formal type parameters of a class or method signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkFormalTypeParameters(final String signature, int pos) {
+ // FormalTypeParameters:
+ // < FormalTypeParameter+ >
+
+ pos = checkChar('<', signature, pos);
+ pos = checkFormalTypeParameter(signature, pos);
+ while (getChar(signature, pos) != '>') {
+ pos = checkFormalTypeParameter(signature, pos);
+ }
+ return pos + 1;
+ }
+
+ /**
+ * Checks a formal type parameter of a class or method signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkFormalTypeParameter(final String signature, int pos) {
+ // FormalTypeParameter:
+ // Identifier : FieldTypeSignature? (: FieldTypeSignature)*
+
+ pos = checkIdentifier(signature, pos);
+ pos = checkChar(':', signature, pos);
+ if ("L[T".indexOf(getChar(signature, pos)) != -1) {
+ pos = checkFieldTypeSignature(signature, pos);
+ }
+ while (getChar(signature, pos) == ':') {
+ pos = checkFieldTypeSignature(signature, pos + 1);
+ }
+ return pos;
+ }
+
+ /**
+ * Checks a field type signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkFieldTypeSignature(final String signature, int pos) {
+ // FieldTypeSignature:
+ // ClassTypeSignature | ArrayTypeSignature | TypeVariableSignature
+ //
+ // ArrayTypeSignature:
+ // [ TypeSignature
+
+ switch (getChar(signature, pos)) {
+ case 'L':
+ return checkClassTypeSignature(signature, pos);
+ case '[':
+ return checkTypeSignature(signature, pos + 1);
+ default:
+ return checkTypeVariableSignature(signature, pos);
+ }
+ }
+
+ /**
+ * Checks a class type signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkClassTypeSignature(final String signature, int pos) {
+ // ClassTypeSignature:
+ // L Identifier ( / Identifier )* TypeArguments? ( . Identifier
+ // TypeArguments? )* ;
+
+ pos = checkChar('L', signature, pos);
+ pos = checkIdentifier(signature, pos);
+ while (getChar(signature, pos) == '/') {
+ pos = checkIdentifier(signature, pos + 1);
+ }
+ if (getChar(signature, pos) == '<') {
+ pos = checkTypeArguments(signature, pos);
+ }
+ while (getChar(signature, pos) == '.') {
+ pos = checkIdentifier(signature, pos + 1);
+ if (getChar(signature, pos) == '<') {
+ pos = checkTypeArguments(signature, pos);
+ }
+ }
+ return checkChar(';', signature, pos);
+ }
+
+ /**
+ * Checks the type arguments in a class type signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkTypeArguments(final String signature, int pos) {
+ // TypeArguments:
+ // < TypeArgument+ >
+
+ pos = checkChar('<', signature, pos);
+ pos = checkTypeArgument(signature, pos);
+ while (getChar(signature, pos) != '>') {
+ pos = checkTypeArgument(signature, pos);
+ }
+ return pos + 1;
+ }
+
+ /**
+ * Checks a type argument in a class type signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkTypeArgument(final String signature, int pos) {
+ // TypeArgument:
+ // * | ( ( + | - )? FieldTypeSignature )
+
+ char c = getChar(signature, pos);
+ if (c == '*') {
+ return pos + 1;
+ } else if (c == '+' || c == '-') {
+ pos++;
+ }
+ return checkFieldTypeSignature(signature, pos);
+ }
+
+ /**
+ * Checks a type variable signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkTypeVariableSignature(final String signature,
+ int pos) {
+ // TypeVariableSignature:
+ // T Identifier ;
+
+ pos = checkChar('T', signature, pos);
+ pos = checkIdentifier(signature, pos);
+ return checkChar(';', signature, pos);
+ }
+
+ /**
+ * Checks a type signature.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkTypeSignature(final String signature, int pos) {
+ // TypeSignature:
+ // Z | C | B | S | I | F | J | D | FieldTypeSignature
+
+ switch (getChar(signature, pos)) {
+ case 'Z':
+ case 'C':
+ case 'B':
+ case 'S':
+ case 'I':
+ case 'F':
+ case 'J':
+ case 'D':
+ return pos + 1;
+ default:
+ return checkFieldTypeSignature(signature, pos);
+ }
+ }
+
+ /**
+ * Checks an identifier.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkIdentifier(final String signature, int pos) {
+ if (!Character.isJavaIdentifierStart(getChar(signature, pos))) {
+ throw new IllegalArgumentException(signature
+ + ": identifier expected at index " + pos);
+ }
+ ++pos;
+ while (Character.isJavaIdentifierPart(getChar(signature, pos))) {
+ ++pos;
+ }
+ return pos;
+ }
+
+ /**
+ * Checks a single character.
+ *
+ * @param signature
+ * a string containing the signature that must be checked.
+ * @param pos
+ * index of first character to be checked.
+ * @return the index of the first character after the checked part.
+ */
+ private static int checkChar(final char c, final String signature, int pos) {
+ if (getChar(signature, pos) == c) {
+ return pos + 1;
+ }
+ throw new IllegalArgumentException(signature + ": '" + c
+ + "' expected at index " + pos);
+ }
+
+ /**
+ * Returns the signature car at the given index.
+ *
+ * @param signature
+ * a signature.
+ * @param pos
+ * an index in signature.
+ * @return the character at the given index, or 0 if there is no such
+ * character.
+ */
+ private static char getChar(final String signature, int pos) {
+ return pos < signature.length() ? signature.charAt(pos) : (char) 0;
+ }
}