javassist

Class ClassMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap

javassist.ClassMap

All Implemented Interfaces:

Serializable, Cloneable, Map

public class ClassMap
extends HashMap

A hash table associating class names with different names.

This hashtable is used for replacing class names in a class definition or a method body. Define a subclass of this class if a more complex mapping algorithm is needed. For example,

class MyClassMap extends ClassMap {
   public Object get(Object jvmClassName) {
     String name = toJavaName((String)jvmClassName);
     if (name.startsWith("java."))
         return toJvmName("java2." + name.substring(5));
     else
         return super.get(jvmClassName);
   }
 }

This subclass maps java.lang.String to java2.lang.String. Note that get() receives and returns the internal representation of a class name. For example, the internal representation of java.lang.String is java/lang/String.

Note that this is a map from String to String.

See Also:

get(Object), CtClass.replaceClassName(ClassMap), CtNewMethod.copy(CtMethod,String,CtClass,ClassMap), Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
ClassMap() Constructs a hash table.

Method Summary

Modifier and Type	Method and Description
void	fix(CtClass clazz) Prevents a mapping from the specified class name to another name.
void	fix(String name) Prevents a mapping from the specified class name to another name.
Object	get(Object jvmClassName) Returns the class name to wihch the given jvmClassName is mapped.
void	put(CtClass oldname, CtClass newname) Maps a class name to another name in this hashtable.
void	put(String oldname, String newname) Maps a class name to another name in this hashtable.
protected void	put0(Object oldname, Object newname)
void	putIfNone(String oldname, String newname) Is equivalent to put() except that the given mapping is not recorded into the hashtable if another mapping from oldname is already included.
static String	toJavaName(String classname) Converts a class name from the internal representation used in the JVM to the normal one used in Java.
static String	toJvmName(String classname) Converts a class name into the internal representation used in the JVM.

Methods inherited from class java.util.HashMap

clear, clone, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, forEach, getOrDefault, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

ClassMap

public ClassMap()

Constructs a hash table.

Method Detail

put

public void put(CtClass oldname,
                CtClass newname)

Maps a class name to another name in this hashtable. The names are obtained with calling Class.getName(). This method translates the given class names into the internal form used in the JVM before putting it in the hashtable.

Parameters:

oldname - the original class name

newname - the substituted class name.

put

public void put(String oldname,
                String newname)

Maps a class name to another name in this hashtable. If the hashtable contains another mapping from the same class name, the old mapping is replaced. This method translates the given class names into the internal form used in the JVM before putting it in the hashtable.

If oldname is identical to newname, then this method does not perform anything; it does not record the mapping from oldname to newname. See fix method.

Parameters:

oldname - the original class name.

newname - the substituted class name.

See Also:

fix(String)

putIfNone

public void putIfNone(String oldname,
                      String newname)

Is equivalent to put() except that the given mapping is not recorded into the hashtable if another mapping from oldname is already included.

Parameters:

oldname - the original class name.

newname - the substituted class name.

put0

protected final void put0(Object oldname,
                          Object newname)

get

public Object get(Object jvmClassName)

Returns the class name to wihch the given jvmClassName is mapped. A subclass of this class should override this method.

This method receives and returns the internal representation of class name used in the JVM.

Specified by:

get in interface Map

Overrides:

get in class HashMap

See Also:

toJvmName(String), toJavaName(String)

fix

public void fix(CtClass clazz)

Prevents a mapping from the specified class name to another name.

fix

public void fix(String name)

Prevents a mapping from the specified class name to another name.

toJvmName

public static String toJvmName(String classname)

Converts a class name into the internal representation used in the JVM.

toJavaName

public static String toJavaName(String classname)

Converts a class name from the internal representation used in the JVM to the normal one used in Java.