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-rw-r--r--src/main/javassist/bytecode/MethodInfo.java782
1 files changed, 384 insertions, 398 deletions
diff --git a/src/main/javassist/bytecode/MethodInfo.java b/src/main/javassist/bytecode/MethodInfo.java
index 9d434e16..3f3d93ef 100644
--- a/src/main/javassist/bytecode/MethodInfo.java
+++ b/src/main/javassist/bytecode/MethodInfo.java
@@ -24,404 +24,390 @@ import java.util.Map;
/**
* <code>method_info</code> structure.
- *
+ *
* @see javassist.CtMethod#getMethodInfo()
* @see javassist.CtConstructor#getMethodInfo()
*/
-public final class MethodInfo
-{
- ConstPool constPool;
- int accessFlags;
- int name;
- int descriptor;
- LinkedList attribute; // may be null
- public Exception created = new Exception();
-
- /**
- * The name of constructors: <code>&lt;init&gt</code>.
- */
- public static final String nameInit = "<init>";
-
- /**
- * The name of class initializer (static initializer):
- * <code>&lt;clinit&gt</code>.
- */
- public static final String nameClinit = "<clinit>";
-
- private MethodInfo(ConstPool cp)
- {
- constPool = cp;
- attribute = null;
- }
-
- /**
- * Constructs a <code>method_info</code> structure.
- * The initial value of <code>access_flags</code> is zero.
- *
- * @param cp a constant pool table
- * @param methodname method name
- * @param desc method descriptor
- * @see Descriptor
- */
- public MethodInfo(ConstPool cp, String methodname, String desc)
- {
- this(cp);
- accessFlags = 0;
- name = cp.addUtf8Info(methodname);
- descriptor = constPool.addUtf8Info(desc);
- }
-
- MethodInfo(ConstPool cp, DataInputStream in) throws IOException
- {
- this(cp);
- read(in);
- }
-
- /**
- * Constructs a copy of <code>method_info</code> structure.
- * Class names appearing in the source <code>method_info</code>
- * are renamed according to <code>classnameMap</code>.
- * <p/>
- * <p>Note: only <code>Code</code> and <code>Exceptions</code>
- * attributes are copied from the source. The other attributes
- * are ignored.
- *
- * @param cp a constant pool table
- * @param methodname a method name
- * @param src a source <code>method_info</code>
- * @param classnameMap specifies pairs of replaced and substituted
- * name.
- * @see Descriptor
- */
- public MethodInfo(ConstPool cp, String methodname, MethodInfo src,
- Map classnameMap) throws BadBytecode
- {
- this(cp);
- read(src, methodname, classnameMap);
- }
-
- public String toString()
- {
- return constPool.getUtf8Info(name) + " " + constPool.getUtf8Info(descriptor);
- }
-
- void prune(ConstPool cp)
- {
- attribute = null;
- name = cp.addUtf8Info(getName());
- descriptor = cp.addUtf8Info(getDescriptor());
- constPool = cp;
- }
-
- /**
- * Returns a method name.
- */
- public String getName()
- {
- return constPool.getUtf8Info(name);
- }
-
- /**
- * Sets a method name.
- */
- public void setName(String newName)
- {
- name = constPool.addUtf8Info(newName);
- }
-
- /**
- * Returns true if this is not a constructor or a class initializer
- * (static initializer).
- */
- public boolean isMethod()
- {
- String n = getName();
- return !n.equals(nameInit) && !n.equals(nameClinit);
- }
-
- /**
- * Returns a constant pool table used by this method.
- */
- public ConstPool getConstPool()
- {
- return constPool;
- }
-
- /**
- * Returns true if this is a constructor.
- */
- public boolean isConstructor()
- {
- return getName().equals(nameInit);
- }
-
- /**
- * Returns true if this is a class initializer (static initializer).
- */
- public boolean isStaticInitializer()
- {
- return getName().equals(nameClinit);
- }
-
- /**
- * Returns access flags.
- *
- * @see AccessFlag
- */
- public int getAccessFlags()
- {
- return accessFlags;
- }
-
- /**
- * Sets access flags.
- *
- * @see AccessFlag
- */
- public void setAccessFlags(int acc)
- {
- accessFlags = acc;
- }
-
- /**
- * Returns a method descriptor.
- *
- * @see Descriptor
- */
- public String getDescriptor()
- {
- return constPool.getUtf8Info(descriptor);
- }
-
- /**
- * Sets a method descriptor.
- *
- * @see Descriptor
- */
- public void setDescriptor(String desc)
- {
- if (!desc.equals(getDescriptor()))
- descriptor = constPool.addUtf8Info(desc);
- }
-
- /**
- * Returns all the attributes.
- * A new element can be added to the returned list
- * and an existing element can be removed from the list.
- *
- * @return a list of <code>AttributeInfo</code> objects.
- * @see AttributeInfo
- */
- public List getAttributes()
- {
- if (attribute == null)
- attribute = new LinkedList();
-
- return attribute;
- }
-
- /**
- * Returns the attribute with the specified name.
- * If it is not found, this method returns null.
- *
- * @param name attribute name
- * @return an <code>AttributeInfo</code> object or null.
- */
- public AttributeInfo getAttribute(String name)
- {
- return AttributeInfo.lookup(attribute, name);
- }
-
- /**
- * Appends an attribute. If there is already an attribute with
- * the same name, the new one substitutes for it.
- */
- public void addAttribute(AttributeInfo info)
- {
- if (attribute == null)
- attribute = new LinkedList();
-
- AttributeInfo.remove(attribute, info.getName());
- attribute.add(info);
- }
-
- /**
- * Returns an Exceptions attribute.
- *
- * @return an Exceptions attribute
- * or null if it is not specified.
- */
- public ExceptionsAttribute getExceptionsAttribute()
- {
- AttributeInfo info
- = AttributeInfo.lookup(attribute, ExceptionsAttribute.tag);
- return (ExceptionsAttribute) info;
- }
-
- /**
- * Returns a Code attribute.
- *
- * @return a Code attribute
- * or null if it is not specified.
- */
- public CodeAttribute getCodeAttribute()
- {
- AttributeInfo info
- = AttributeInfo.lookup(attribute, CodeAttribute.tag);
- return (CodeAttribute) info;
- }
-
- /**
- * Removes an Exception attribute.
- */
- public void removeExceptionsAttribute()
- {
- AttributeInfo.remove(attribute, ExceptionsAttribute.tag);
- }
-
- /**
- * Adds an Exception attribute.
- * <p/>
- * <p>The added attribute must share the same constant pool table
- * as this <code>method_info</code> structure.
- */
- public void setExceptionsAttribute(ExceptionsAttribute cattr)
- {
- removeExceptionsAttribute();
- if (attribute == null)
- attribute = new LinkedList();
-
- attribute.add(cattr);
- }
-
- /**
- * Removes a Code attribute.
- */
- public void removeCodeAttribute()
- {
- AttributeInfo.remove(attribute, CodeAttribute.tag);
- }
-
- /**
- * Adds a Code attribute.
- * <p/>
- * <p>The added attribute must share the same constant pool table
- * as this <code>method_info</code> structure.
- */
- public void setCodeAttribute(CodeAttribute cattr)
- {
- removeCodeAttribute();
- if (attribute == null)
- attribute = new LinkedList();
-
- attribute.add(cattr);
- }
-
- /**
- * Returns the line number of the source line corresponding to the
- * specified bytecode contained in this method.
- *
- * @param pos the position of the bytecode (&gt;= 0).
- * an index into the code array.
- * @return -1 if this information is not available.
- */
- public int getLineNumber(int pos)
- {
- CodeAttribute ca = getCodeAttribute();
- if (ca == null)
- return -1;
-
- LineNumberAttribute ainfo =
- (LineNumberAttribute) ca.getAttribute(LineNumberAttribute.tag);
- if (ainfo == null)
- return -1;
-
- return ainfo.toLineNumber(pos);
- }
-
- /**
- * Changes a super constructor called by this constructor.
- * <p/>
- * <p>This method modifies a call to <code>super()</code>,
- * which should be at the
- * head of a constructor body, so that a constructor in a different
- * super class is called. This method does not change actural
- * parameters. Hence the new super class must have a constructor
- * with the same signature as the original one.
- * <p/>
- * <p>This method should be called when the super class
- * of the class declaring this method is changed.
- * <p/>
- * <p>This method does not perform anything unless this
- * <code>MethodInfo</code> represents a constructor.
- *
- * @param superclass the new super class
- */
- public void setSuperclass(String superclass) throws BadBytecode
- {
- if (!isConstructor())
- return;
-
- CodeAttribute ca = getCodeAttribute();
- byte[] code = ca.getCode();
- CodeIterator iterator = ca.iterator();
- int pos = iterator.skipSuperConstructor();
- if (pos >= 0)
- { // not this()
- ConstPool cp = constPool;
- int mref = ByteArray.readU16bit(code, pos + 1);
- int nt = cp.getMethodrefNameAndType(mref);
- int sc = cp.addClassInfo(superclass);
- int mref2 = cp.addMethodrefInfo(sc, nt);
- ByteArray.write16bit(mref2, code, pos + 1);
- }
- }
-
- private void read(MethodInfo src, String methodname, Map classnames)
- throws BadBytecode
- {
- ConstPool destCp = constPool;
- accessFlags = src.accessFlags;
- name = destCp.addUtf8Info(methodname);
-
- ConstPool srcCp = src.constPool;
- String desc = srcCp.getUtf8Info(src.descriptor);
- String desc2 = Descriptor.rename(desc, classnames);
- descriptor = destCp.addUtf8Info(desc2);
-
- attribute = new LinkedList();
- ExceptionsAttribute eattr = src.getExceptionsAttribute();
- if (eattr != null)
- attribute.add(eattr.copy(destCp, classnames));
-
- CodeAttribute cattr = src.getCodeAttribute();
- if (cattr != null)
- attribute.add(cattr.copy(destCp, classnames));
- }
-
- private void read(DataInputStream in) throws IOException
- {
- accessFlags = in.readUnsignedShort();
- name = in.readUnsignedShort();
- descriptor = in.readUnsignedShort();
- int n = in.readUnsignedShort();
- attribute = new LinkedList();
- for (int i = 0; i < n; ++i)
- attribute.add(AttributeInfo.read(constPool, in));
- }
-
- void write(DataOutputStream out) throws IOException
- {
- out.writeShort(accessFlags);
- out.writeShort(name);
- out.writeShort(descriptor);
-
- if (attribute == null)
- out.writeShort(0);
- else
- {
- out.writeShort(attribute.size());
- AttributeInfo.writeAll(attribute, out);
- }
- }
-}
+public final class MethodInfo {
+ ConstPool constPool;
+
+ int accessFlags;
+
+ int name;
+
+ int descriptor;
+
+ LinkedList attribute; // may be null
+
+ // Bill, do you really need this?
+ // public Exception created = new Exception();
+
+ /**
+ * The name of constructors: <code>&lt;init&gt</code>.
+ */
+ public static final String nameInit = "<init>";
+
+ /**
+ * The name of class initializer (static initializer):
+ * <code>&lt;clinit&gt</code>.
+ */
+ public static final String nameClinit = "<clinit>";
+
+ private MethodInfo(ConstPool cp) {
+ constPool = cp;
+ attribute = null;
+ }
+
+ /**
+ * Constructs a <code>method_info</code> structure. The initial value of
+ * <code>access_flags</code> is zero.
+ *
+ * @param cp
+ * a constant pool table
+ * @param methodname
+ * method name
+ * @param desc
+ * method descriptor
+ * @see Descriptor
+ */
+ public MethodInfo(ConstPool cp, String methodname, String desc) {
+ this(cp);
+ accessFlags = 0;
+ name = cp.addUtf8Info(methodname);
+ descriptor = constPool.addUtf8Info(desc);
+ }
+
+ MethodInfo(ConstPool cp, DataInputStream in) throws IOException {
+ this(cp);
+ read(in);
+ }
+
+ /**
+ * Constructs a copy of <code>method_info</code> structure. Class names
+ * appearing in the source <code>method_info</code> are renamed according
+ * to <code>classnameMap</code>.
+ *
+ * <p>
+ * Note: only <code>Code</code> and <code>Exceptions</code> attributes
+ * are copied from the source. The other attributes are ignored.
+ *
+ * @param cp
+ * a constant pool table
+ * @param methodname
+ * a method name
+ * @param src
+ * a source <code>method_info</code>
+ * @param classnameMap
+ * specifies pairs of replaced and substituted name.
+ * @see Descriptor
+ */
+ public MethodInfo(ConstPool cp, String methodname, MethodInfo src,
+ Map classnameMap) throws BadBytecode {
+ this(cp);
+ read(src, methodname, classnameMap);
+ }
+
+ /**
+ * Returns a string representation of the object.
+ */
+ public String toString() {
+ return constPool.getUtf8Info(name) + " "
+ + constPool.getUtf8Info(descriptor);
+ }
+
+ void prune(ConstPool cp) {
+ attribute = null;
+ name = cp.addUtf8Info(getName());
+ descriptor = cp.addUtf8Info(getDescriptor());
+ constPool = cp;
+ }
+
+ /**
+ * Returns a method name.
+ */
+ public String getName() {
+ return constPool.getUtf8Info(name);
+ }
+
+ /**
+ * Sets a method name.
+ */
+ public void setName(String newName) {
+ name = constPool.addUtf8Info(newName);
+ }
+
+ /**
+ * Returns true if this is not a constructor or a class initializer (static
+ * initializer).
+ */
+ public boolean isMethod() {
+ String n = getName();
+ return !n.equals(nameInit) && !n.equals(nameClinit);
+ }
+
+ /**
+ * Returns a constant pool table used by this method.
+ */
+ public ConstPool getConstPool() {
+ return constPool;
+ }
+
+ /**
+ * Returns true if this is a constructor.
+ */
+ public boolean isConstructor() {
+ return getName().equals(nameInit);
+ }
+
+ /**
+ * Returns true if this is a class initializer (static initializer).
+ */
+ public boolean isStaticInitializer() {
+ return getName().equals(nameClinit);
+ }
+
+ /**
+ * Returns access flags.
+ *
+ * @see AccessFlag
+ */
+ public int getAccessFlags() {
+ return accessFlags;
+ }
+
+ /**
+ * Sets access flags.
+ *
+ * @see AccessFlag
+ */
+ public void setAccessFlags(int acc) {
+ accessFlags = acc;
+ }
+
+ /**
+ * Returns a method descriptor.
+ *
+ * @see Descriptor
+ */
+ public String getDescriptor() {
+ return constPool.getUtf8Info(descriptor);
+ }
+
+ /**
+ * Sets a method descriptor.
+ *
+ * @see Descriptor
+ */
+ public void setDescriptor(String desc) {
+ if (!desc.equals(getDescriptor()))
+ descriptor = constPool.addUtf8Info(desc);
+ }
+
+ /**
+ * Returns all the attributes. A new element can be added to the returned
+ * list and an existing element can be removed from the list.
+ *
+ * @return a list of <code>AttributeInfo</code> objects.
+ * @see AttributeInfo
+ */
+ public List getAttributes() {
+ if (attribute == null)
+ attribute = new LinkedList();
+
+ return attribute;
+ }
+
+ /**
+ * Returns the attribute with the specified name. If it is not found, this
+ * method returns null.
+ *
+ * @param name
+ * attribute name
+ * @return an <code>AttributeInfo</code> object or null.
+ */
+ public AttributeInfo getAttribute(String name) {
+ return AttributeInfo.lookup(attribute, name);
+ }
+
+ /**
+ * Appends an attribute. If there is already an attribute with the same
+ * name, the new one substitutes for it.
+ */
+ public void addAttribute(AttributeInfo info) {
+ if (attribute == null)
+ attribute = new LinkedList();
+
+ AttributeInfo.remove(attribute, info.getName());
+ attribute.add(info);
+ }
+
+ /**
+ * Returns an Exceptions attribute.
+ *
+ * @return an Exceptions attribute or null if it is not specified.
+ */
+ public ExceptionsAttribute getExceptionsAttribute() {
+ AttributeInfo info = AttributeInfo.lookup(attribute,
+ ExceptionsAttribute.tag);
+ return (ExceptionsAttribute)info;
+ }
+
+ /**
+ * Returns a Code attribute.
+ *
+ * @return a Code attribute or null if it is not specified.
+ */
+ public CodeAttribute getCodeAttribute() {
+ AttributeInfo info = AttributeInfo.lookup(attribute, CodeAttribute.tag);
+ return (CodeAttribute)info;
+ }
+
+ /**
+ * Removes an Exception attribute.
+ */
+ public void removeExceptionsAttribute() {
+ AttributeInfo.remove(attribute, ExceptionsAttribute.tag);
+ }
+
+ /**
+ * Adds an Exception attribute.
+ *
+ * <p>
+ * The added attribute must share the same constant pool table as this
+ * <code>method_info</code> structure.
+ */
+ public void setExceptionsAttribute(ExceptionsAttribute cattr) {
+ removeExceptionsAttribute();
+ if (attribute == null)
+ attribute = new LinkedList();
+
+ attribute.add(cattr);
+ }
+
+ /**
+ * Removes a Code attribute.
+ */
+ public void removeCodeAttribute() {
+ AttributeInfo.remove(attribute, CodeAttribute.tag);
+ }
+
+ /**
+ * Adds a Code attribute.
+ *
+ * <p>
+ * The added attribute must share the same constant pool table as this
+ * <code>method_info</code> structure.
+ */
+ public void setCodeAttribute(CodeAttribute cattr) {
+ removeCodeAttribute();
+ if (attribute == null)
+ attribute = new LinkedList();
+
+ attribute.add(cattr);
+ }
+
+ /**
+ * Returns the line number of the source line corresponding to the specified
+ * bytecode contained in this method.
+ *
+ * @param pos
+ * the position of the bytecode (&gt;= 0). an index into the code
+ * array.
+ * @return -1 if this information is not available.
+ */
+ public int getLineNumber(int pos) {
+ CodeAttribute ca = getCodeAttribute();
+ if (ca == null)
+ return -1;
+
+ LineNumberAttribute ainfo = (LineNumberAttribute)ca
+ .getAttribute(LineNumberAttribute.tag);
+ if (ainfo == null)
+ return -1;
+
+ return ainfo.toLineNumber(pos);
+ }
+
+ /**
+ * Changes a super constructor called by this constructor.
+ *
+ * <p>
+ * This method modifies a call to <code>super()</code>, which should be
+ * at the head of a constructor body, so that a constructor in a different
+ * super class is called. This method does not change actural parameters.
+ * Hence the new super class must have a constructor with the same signature
+ * as the original one.
+ *
+ * <p>
+ * This method should be called when the super class of the class declaring
+ * this method is changed.
+ *
+ * <p>
+ * This method does not perform anything unless this <code>MethodInfo</code>
+ * represents a constructor.
+ *
+ * @param superclass
+ * the new super class
+ */
+ public void setSuperclass(String superclass) throws BadBytecode {
+ if (!isConstructor())
+ return;
+
+ CodeAttribute ca = getCodeAttribute();
+ byte[] code = ca.getCode();
+ CodeIterator iterator = ca.iterator();
+ int pos = iterator.skipSuperConstructor();
+ if (pos >= 0) { // not this()
+ ConstPool cp = constPool;
+ int mref = ByteArray.readU16bit(code, pos + 1);
+ int nt = cp.getMethodrefNameAndType(mref);
+ int sc = cp.addClassInfo(superclass);
+ int mref2 = cp.addMethodrefInfo(sc, nt);
+ ByteArray.write16bit(mref2, code, pos + 1);
+ }
+ }
+
+ private void read(MethodInfo src, String methodname, Map classnames)
+ throws BadBytecode {
+ ConstPool destCp = constPool;
+ accessFlags = src.accessFlags;
+ name = destCp.addUtf8Info(methodname);
+
+ ConstPool srcCp = src.constPool;
+ String desc = srcCp.getUtf8Info(src.descriptor);
+ String desc2 = Descriptor.rename(desc, classnames);
+ descriptor = destCp.addUtf8Info(desc2);
+
+ attribute = new LinkedList();
+ ExceptionsAttribute eattr = src.getExceptionsAttribute();
+ if (eattr != null)
+ attribute.add(eattr.copy(destCp, classnames));
+
+ CodeAttribute cattr = src.getCodeAttribute();
+ if (cattr != null)
+ attribute.add(cattr.copy(destCp, classnames));
+ }
+
+ private void read(DataInputStream in) throws IOException {
+ accessFlags = in.readUnsignedShort();
+ name = in.readUnsignedShort();
+ descriptor = in.readUnsignedShort();
+ int n = in.readUnsignedShort();
+ attribute = new LinkedList();
+ for (int i = 0; i < n; ++i)
+ attribute.add(AttributeInfo.read(constPool, in));
+ }
+
+ void write(DataOutputStream out) throws IOException {
+ out.writeShort(accessFlags);
+ out.writeShort(name);
+ out.writeShort(descriptor);
+
+ if (attribute == null)
+ out.writeShort(0);
+ else {
+ out.writeShort(attribute.size());
+ AttributeInfo.writeAll(attribute, out);
+ }
+ }
+} \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 09:53:20 +0000