limited support for annotations

git-svn-id: https://wala.svn.sourceforge.net/svnroot/wala/trunk@571 f5eafffb-2e1d-0410-98e4-8ec43c5233c4

com.ibm.wala.shrike/src/com/ibm/wala/shrikeBT/shrikeCT/tools/ClassPrinter.java

@@ -30,6 +30,7 @@ import com.ibm.wala.shrikeCT.ConstantValueReader;
 import com.ibm.wala.shrikeCT.InvalidClassFileException;
 import com.ibm.wala.shrikeCT.LineNumberTableReader;
 import com.ibm.wala.shrikeCT.LocalVariableTableReader;
+import com.ibm.wala.shrikeCT.RuntimeInvisibleAnnotationsReader;
 import com.ibm.wala.shrikeCT.SignatureReader;
 import com.ibm.wala.shrikeCT.SourceFileReader;
 
@@ -40,6 +41,8 @@ import com.ibm.wala.shrikeCT.SourceFileReader;
  * In Unix I run it like this: java -cp ~/dev/shrike/shrike
  * com.ibm.wala.shrikeBT.shrikeCT.tools.ClassPrinter test.jar This will print
  * the contents of every class in the JAR file.
+ * 
+ * @author roca
  */
 public class ClassPrinter {
   private PrintWriter w;
@@ -263,6 +266,23 @@ public class ClassPrinter {
       } else if (name.equals("Signature")) {
         SignatureReader sr = new SignatureReader(attrs);
         w.write("    signature: " + cr.getCP().getCPUtf8(sr.getSignatureCPIndex()) + "\n");
+      } else if (name.equals("RuntimeInvisibleAnnotations")) {
+        RuntimeInvisibleAnnotationsReader r = new RuntimeInvisibleAnnotationsReader(attrs);
+        try {
+          int[] annotations = r.getAnnotationOffsets();
+          for (int j : annotations) {
+            w.write("    Annotation type: " + r.getAnnotationType(j) + "\n");
+          }
+        } catch (RuntimeInvisibleAnnotationsReader.UnimplementedException e) {
+          int len = attrs.getDataSize();
+          int pos = attrs.getDataOffset();
+          while (len > 0) {
+            int amount = Math.min(16, len);
+            w.write("    " + makeHex(cr.getBytes(), pos, amount, 32) + " " + makeChars(cr.getBytes(), pos, amount) + "\n");
+            len -= amount;
+            pos += amount;
+          }
+        }
       } else {
         int len = attrs.getDataSize();
         int pos = attrs.getDataOffset();

com.ibm.wala.shrike/src/com/ibm/wala/shrikeCT/RuntimeInvisibleAnnotationsReader.java

@@ -0,0 +1,115 @@
+/*******************************************************************************
+ * Copyright (c) 2002,2006 IBM Corporation.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package com.ibm.wala.shrikeCT;
+
+/**
+ * This class reads RuntimeInvisibleAnnotations attributes.
+ * 
+ * @author sjfink
+ */
+public final class RuntimeInvisibleAnnotationsReader extends AttributeReader {
+
+  /**
+   * offset in class file where this attribute begins
+   */
+  private final int beginOffset;
+
+  public RuntimeInvisibleAnnotationsReader(ClassReader.AttrIterator iter) throws InvalidClassFileException {
+    super(iter, "RuntimeInvisibleAnnotations");
+    beginOffset = attr;
+  }
+
+  /**
+   * @return number of annotations in this attribute
+   * @throws InvalidClassFileException
+   */
+  public int getAnnotationCount() throws InvalidClassFileException {
+    int offset = beginOffset + 6;
+    checkSize(offset, 2);
+    return cr.getUShort(offset);
+  }
+
+  /**
+   * @return total length of this attribute in bytes, <bf>including</bf> the
+   *         first 6 bytes
+   * @throws InvalidClassFileException
+   */
+  public int getAttributeSize() throws InvalidClassFileException {
+    int offset = beginOffset + 2;
+    checkSize(offset, 4);
+    return cr.getInt(offset) + 6;
+  }
+
+  /**
+   * @return the offsets into the class file of the annotations of this
+   *         attribute
+   * @throws InvalidClassFileException
+   * @throws UnimplementedException 
+   */
+  public int[] getAnnotationOffsets() throws InvalidClassFileException, UnimplementedException {
+    int[] result = new int[getAnnotationCount()];
+    int offset = beginOffset + 8;
+    for (int i = 0; i < result.length; i++) {
+      result[i] = offset;
+      offset += getAnnotationSize(offset);
+    }
+    return result;
+  }
+
+  /**
+   * @param begin
+   *          offset in the constant pool
+   * @return the size, in bytes, of the annotation structure starting at a given
+   *         offset
+   * @throws InvalidClassFileException
+   * @throws UnimplementedException 
+   */
+  private int getAnnotationSize(int begin) throws InvalidClassFileException, UnimplementedException {
+    int offset = begin + 2;
+    checkSize(offset, 2);
+    int numElementValuePairs = cr.getUShort(offset);
+    offset += 2;
+    for (int i = 0; i < numElementValuePairs; i++) {
+      offset += 2;
+      offset += getElementValueSize(offset);
+    }
+    return offset - begin;
+  }
+
+  /**
+   * @return the size, in bytes, of the element-value structure starting at a
+   *         given offset
+   * @throws UnimplementedException 
+   * 
+   */
+  private int getElementValueSize(int begin) throws UnimplementedException {
+    throw new UnimplementedException();
+  }
+
+  /**
+   * temporary migration aid until I've implemented everything.
+   * 
+   * @author sjfink
+   * 
+   */
+  public static class UnimplementedException extends Exception {
+  }
+
+  /**
+   * @return the type of the annotation stating at a given offset 
+   * @throws InvalidClassFileException 
+   */
+  public String getAnnotationType(int offset) throws InvalidClassFileException {
+    checkSize(offset, 2);
+    int cpOffset = cr.getUShort(offset);
+    return cr.getCP().getCPUtf8(cpOffset);
+  }
+}