/
ConstPool.java
2564 lines (2259 loc) · 68.8 KB
/
ConstPool.java
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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.bytecode;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javassist.CtClass;
/**
* Constant pool table.
*/
public final class ConstPool
{
LongVector items;
int numOfItems;
int thisClassInfo;
Map<ConstInfo,ConstInfo> itemsCache;
/**
* <code>CONSTANT_Class</code>
*/
public static final int CONST_Class = ClassInfo.tag;
/**
* <code>CONSTANT_Fieldref</code>
*/
public static final int CONST_Fieldref = FieldrefInfo.tag;
/**
* <code>CONSTANT_Methodref</code>
*/
public static final int CONST_Methodref = MethodrefInfo.tag;
/**
* <code>CONSTANT_InterfaceMethodref</code>
*/
public static final int CONST_InterfaceMethodref
= InterfaceMethodrefInfo.tag;
/**
* <code>CONSTANT_String</code>
*/
public static final int CONST_String = StringInfo.tag;
/**
* <code>CONSTANT_Integer</code>
*/
public static final int CONST_Integer = IntegerInfo.tag;
/**
* <code>CONSTANT_Float</code>
*/
public static final int CONST_Float = FloatInfo.tag;
/**
* <code>CONSTANT_Long</code>
*/
public static final int CONST_Long = LongInfo.tag;
/**
* <code>CONSTANT_Double</code>
*/
public static final int CONST_Double = DoubleInfo.tag;
/**
* <code>CONSTANT_NameAndType</code>
*/
public static final int CONST_NameAndType = NameAndTypeInfo.tag;
/**
* <code>CONSTANT_Utf8</code>
*/
public static final int CONST_Utf8 = Utf8Info.tag;
/**
* <code>CONSTANT_MethodHandle</code>
*/
public static final int CONST_MethodHandle = MethodHandleInfo.tag;
/**
* <code>CONSTANT_MethodHandle</code>
*/
public static final int CONST_MethodType = MethodTypeInfo.tag;
/**
* <code>CONSTANT_Dynamic</code>
*/
public static final int CONST_Dynamic = DynamicInfo.tag;
/**
* <code>CONSTANT_InvokeDynamic</code>
*/
public static final int CONST_InvokeDynamic = InvokeDynamicInfo.tag;
/**
* <code>CONSTANT_Module</code>
*/
public static final int CONST_Module = ModuleInfo.tag;
/**
* <code>CONSTANT_Package</code>
*/
public static final int CONST_Package = PackageInfo.tag;
/**
* Represents the class using this constant pool table.
*/
public static final CtClass THIS = null;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_getField = 1;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_getStatic = 2;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_putField = 3;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_putStatic = 4;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_invokeVirtual = 5;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_invokeStatic = 6;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_invokeSpecial = 7;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_newInvokeSpecial = 8;
/**
* <code>reference_kind</code> of <code>CONSTANT_MethodHandle_info</code>.
*/
public static final int REF_invokeInterface = 9;
/**
* Constructs a constant pool table.
*
* @param thisclass the name of the class using this constant
* pool table
*/
public ConstPool(String thisclass)
{
items = new LongVector();
itemsCache = null;
numOfItems = 0;
addItem0(null); // index 0 is reserved by the JVM.
thisClassInfo = addClassInfo(thisclass);
}
/**
* Constructs a constant pool table from the given byte stream.
*
* @param in byte stream.
*/
public ConstPool(DataInputStream in) throws IOException
{
itemsCache = null;
thisClassInfo = 0;
/* read() initializes items and numOfItems, and do addItem(null).
*/
read(in);
}
void prune()
{
itemsCache = null;
}
/**
* Returns the number of entries in this table.
*/
public int getSize()
{
return numOfItems;
}
/**
* Returns the name of the class using this constant pool table.
*/
public String getClassName()
{
return getClassInfo(thisClassInfo);
}
/**
* Returns the index of <code>CONSTANT_Class_info</code> structure
* specifying the class using this constant pool table.
*/
public int getThisClassInfo()
{
return thisClassInfo;
}
void setThisClassInfo(int i)
{
thisClassInfo = i;
}
ConstInfo getItem(int n)
{
return items.elementAt(n);
}
/**
* Returns the <code>tag</code> field of the constant pool table
* entry at the given index.
*
* @return either <code>CONST_Class</code>, <code>CONST_Fieldref</code>,
* <code>CONST_Methodref</code>, or ...
*/
public int getTag(int index)
{
return getItem(index).getTag();
}
/**
* Reads <code>CONSTANT_Class_info</code> structure
* at the given index.
*
* @return a fully-qualified class or interface name specified
* by <code>name_index</code>. If the type is an array
* type, this method returns an encoded name like
* <code>[Ljava.lang.Object;</code> (note that the separators
* are not slashes but dots).
* @see javassist.ClassPool#getCtClass(String)
*/
public String getClassInfo(int index)
{
ClassInfo c = (ClassInfo)getItem(index);
if (c == null)
return null;
return Descriptor.toJavaName(getUtf8Info(c.name));
}
/**
* Reads <code>CONSTANT_Class_info</code> structure
* at the given index.
*
* @return the descriptor of the type specified
* by <code>name_index</code>.
* @see javassist.ClassPool#getCtClass(String)
* @since 3.15
*/
public String getClassInfoByDescriptor(int index)
{
ClassInfo c = (ClassInfo)getItem(index);
if (c == null)
return null;
String className = getUtf8Info(c.name);
if (className.charAt(0) == '[')
return className;
return Descriptor.of(className);
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* at the given index.
*/
public int getNameAndTypeName(int index)
{
NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index);
return ntinfo.memberName;
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* at the given index.
*/
public int getNameAndTypeDescriptor(int index)
{
NameAndTypeInfo ntinfo = (NameAndTypeInfo)getItem(index);
return ntinfo.typeDescriptor;
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_Fieldref_info</code>,
* <code>CONSTANT_Methodref_info</code>,
* or <code>CONSTANT_Interfaceref_info</code>,
* structure at the given index.
*
* @since 3.6
*/
public int getMemberClass(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.classIndex;
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_Fieldref_info</code>,
* <code>CONSTANT_Methodref_info</code>,
* or <code>CONSTANT_Interfaceref_info</code>,
* structure at the given index.
*
* @since 3.6
*/
public int getMemberNameAndType(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.nameAndTypeIndex;
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_Fieldref_info</code> structure
* at the given index.
*/
public int getFieldrefClass(int index)
{
FieldrefInfo finfo = (FieldrefInfo)getItem(index);
return finfo.classIndex;
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_Fieldref_info</code> structure
* at the given index.
*
* @return the name of the class at that <code>class_index</code>.
*/
public String getFieldrefClassName(int index)
{
FieldrefInfo f = (FieldrefInfo)getItem(index);
if (f == null)
return null;
return getClassInfo(f.classIndex);
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_Fieldref_info</code> structure
* at the given index.
*/
public int getFieldrefNameAndType(int index)
{
FieldrefInfo finfo = (FieldrefInfo)getItem(index);
return finfo.nameAndTypeIndex;
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_Fieldref_info</code>.
* @return the name of the field.
*/
public String getFieldrefName(int index)
{
FieldrefInfo f = (FieldrefInfo)getItem(index);
if (f == null)
return null;
NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.memberName);
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_Fieldref_info</code>.
* @return the type descriptor of the field.
*/
public String getFieldrefType(int index)
{
FieldrefInfo f = (FieldrefInfo)getItem(index);
if (f == null)
return null;
NameAndTypeInfo n = (NameAndTypeInfo)getItem(f.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.typeDescriptor);
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_Methodref_info</code> structure
* at the given index.
*/
public int getMethodrefClass(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.classIndex;
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_Methodref_info</code> structure
* at the given index.
*
* @return the name of the class at that <code>class_index</code>.
*/
public String getMethodrefClassName(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (minfo == null)
return null;
return getClassInfo(minfo.classIndex);
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_Methodref_info</code> structure
* at the given index.
*/
public int getMethodrefNameAndType(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.nameAndTypeIndex;
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_Methodref_info</code>.
* @return the name of the method.
*/
public String getMethodrefName(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (minfo == null)
return null;
NameAndTypeInfo n
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.memberName);
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_Methodref_info</code>.
* @return the descriptor of the method.
*/
public String getMethodrefType(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (minfo == null)
return null;
NameAndTypeInfo n
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.typeDescriptor);
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_InterfaceMethodref_info</code> structure
* at the given index.
*/
public int getInterfaceMethodrefClass(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.classIndex;
}
/**
* Reads the <code>class_index</code> field of the
* <code>CONSTANT_InterfaceMethodref_info</code> structure
* at the given index.
*
* @return the name of the class at that <code>class_index</code>.
*/
public String getInterfaceMethodrefClassName(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return getClassInfo(minfo.classIndex);
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_InterfaceMethodref_info</code> structure
* at the given index.
*/
public int getInterfaceMethodrefNameAndType(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
return minfo.nameAndTypeIndex;
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to
* a <code>CONSTANT_InterfaceMethodref_info</code>.
* @return the name of the method.
*/
public String getInterfaceMethodrefName(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (minfo == null)
return null;
NameAndTypeInfo n
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.memberName);
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to
* a <code>CONSTANT_InterfaceMethodref_info</code>.
* @return the descriptor of the method.
*/
public String getInterfaceMethodrefType(int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (minfo == null)
return null;
NameAndTypeInfo n
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if(n == null)
return null;
return getUtf8Info(n.typeDescriptor);
}
/**
* Reads <code>CONSTANT_Integer_info</code>, <code>_Float_info</code>,
* <code>_Long_info</code>, <code>_Double_info</code>, or
* <code>_String_info</code> structure.
* These are used with the LDC instruction.
*
* @return a <code>String</code> value or a wrapped primitive-type
* value.
*/
public Object getLdcValue(int index)
{
ConstInfo constInfo = this.getItem(index);
Object value = null;
if (constInfo instanceof StringInfo)
value = this.getStringInfo(index);
else if (constInfo instanceof FloatInfo)
value = Float.valueOf(getFloatInfo(index));
else if (constInfo instanceof IntegerInfo)
value = Integer.valueOf(getIntegerInfo(index));
else if (constInfo instanceof LongInfo)
value = Long.valueOf(getLongInfo(index));
else if (constInfo instanceof DoubleInfo)
value = Double.valueOf(getDoubleInfo(index));
return value;
}
/**
* Reads <code>CONSTANT_Integer_info</code> structure
* at the given index.
*
* @return the value specified by this entry.
*/
public int getIntegerInfo(int index)
{
IntegerInfo i = (IntegerInfo)getItem(index);
return i.value;
}
/**
* Reads <code>CONSTANT_Float_info</code> structure
* at the given index.
*
* @return the value specified by this entry.
*/
public float getFloatInfo(int index)
{
FloatInfo i = (FloatInfo)getItem(index);
return i.value;
}
/**
* Reads <code>CONSTANT_Long_info</code> structure
* at the given index.
*
* @return the value specified by this entry.
*/
public long getLongInfo(int index)
{
LongInfo i = (LongInfo)getItem(index);
return i.value;
}
/**
* Reads <code>CONSTANT_Double_info</code> structure
* at the given index.
*
* @return the value specified by this entry.
*/
public double getDoubleInfo(int index)
{
DoubleInfo i = (DoubleInfo)getItem(index);
return i.value;
}
/**
* Reads <code>CONSTANT_String_info</code> structure
* at the given index.
*
* @return the string specified by <code>string_index</code>.
*/
public String getStringInfo(int index)
{
StringInfo si = (StringInfo)getItem(index);
return getUtf8Info(si.string);
}
/**
* Reads <code>CONSTANT_utf8_info</code> structure
* at the given index.
*
* @return the string specified by this entry.
*/
public String getUtf8Info(int index)
{
Utf8Info utf = (Utf8Info)getItem(index);
return utf.string;
}
/**
* Reads the <code>reference_kind</code> field of the
* <code>CONSTANT_MethodHandle_info</code> structure
* at the given index.
*
* @see #REF_getField
* @see #REF_getStatic
* @see #REF_invokeInterface
* @see #REF_invokeSpecial
* @see #REF_invokeStatic
* @see #REF_invokeVirtual
* @see #REF_newInvokeSpecial
* @see #REF_putField
* @see #REF_putStatic
* @since 3.17
*/
public int getMethodHandleKind(int index)
{
MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index);
return mhinfo.refKind;
}
/**
* Reads the <code>reference_index</code> field of the
* <code>CONSTANT_MethodHandle_info</code> structure
* at the given index.
*
* @since 3.17
*/
public int getMethodHandleIndex(int index)
{
MethodHandleInfo mhinfo = (MethodHandleInfo)getItem(index);
return mhinfo.refIndex;
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_MethodType_info</code> structure
* at the given index.
*
* @since 3.17
*/
public int getMethodTypeInfo(int index)
{
MethodTypeInfo mtinfo = (MethodTypeInfo)getItem(index);
return mtinfo.descriptor;
}
/**
* Reads the <code>bootstrap_method_attr_index</code> field of the
* <code>CONSTANT_InvokeDynamic_info</code> structure
* at the given index.
*
* @since 3.17
*/
public int getInvokeDynamicBootstrap(int index)
{
InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index);
return iv.bootstrap;
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_InvokeDynamic_info</code> structure
* at the given index.
*
* @since 3.17
*/
public int getInvokeDynamicNameAndType(int index)
{
InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index);
return iv.nameAndType;
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_InvokeDynamic_info</code>.
* @return the descriptor of the bootstrap method.
* @since 3.17
*/
public String getInvokeDynamicType(int index)
{
InvokeDynamicInfo iv = (InvokeDynamicInfo)getItem(index);
if (iv == null)
return null;
NameAndTypeInfo n = (NameAndTypeInfo)getItem(iv.nameAndType);
if(n == null)
return null;
return getUtf8Info(n.typeDescriptor);
}
/**
* Reads the <code>bootstrap_method_attr_index</code> field of the
* <code>CONSTANT_Dynamic_info</code> structure
* at the given index.
*
* @since 3.26
*/
public int getDynamicBootstrap(int index)
{
DynamicInfo iv = (DynamicInfo)getItem(index);
return iv.bootstrap;
}
/**
* Reads the <code>name_and_type_index</code> field of the
* <code>CONSTANT_Dynamic_info</code> structure
* at the given index.
*
* @since 3.26
*/
public int getDynamicNameAndType(int index)
{
DynamicInfo iv = (DynamicInfo)getItem(index);
return iv.nameAndType;
}
/**
* Reads the <code>descriptor_index</code> field of the
* <code>CONSTANT_NameAndType_info</code> structure
* indirectly specified by the given index.
*
* @param index an index to a <code>CONSTANT_Dynamic_info</code>.
* @return the descriptor of the bootstrap method.
* @since 3.26
*/
public String getDynamicType(int index)
{
DynamicInfo iv = (DynamicInfo)getItem(index);
if (iv == null)
return null;
NameAndTypeInfo n = (NameAndTypeInfo)getItem(iv.nameAndType);
if(n == null)
return null;
return getUtf8Info(n.typeDescriptor);
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_Module_info</code> structure at the given index.
*
* @return the module name at <code>name_index</code>.
* @since 3.22
*/
public String getModuleInfo(int index)
{
ModuleInfo mi = (ModuleInfo)getItem(index);
return getUtf8Info(mi.name);
}
/**
* Reads the <code>name_index</code> field of the
* <code>CONSTANT_Package_info</code> structure at the given index.
*
* @return the package name at <code>name_index</code>. It is a slash-
* separated name such as com/oracle/net.
* @since 3.22
*/
public String getPackageInfo(int index)
{
PackageInfo mi = (PackageInfo)getItem(index);
return getUtf8Info(mi.name);
}
/**
* Determines whether <code>CONSTANT_Methodref_info</code>
* structure at the given index represents the constructor
* of the given class.
*
* @return the <code>descriptor_index</code> specifying
* the type descriptor of the that constructor.
* If it is not that constructor,
* <code>isConstructor()</code> returns 0.
*/
public int isConstructor(String classname, int index)
{
return isMember(classname, MethodInfo.nameInit, index);
}
/**
* Determines whether <code>CONSTANT_Methodref_info</code>,
* <code>CONSTANT_Fieldref_info</code>, or
* <code>CONSTANT_InterfaceMethodref_info</code> structure
* at the given index represents the member with the specified
* name and declaring class.
*
* @param classname the class declaring the member
* @param membername the member name
* @param index the index into the constant pool table
*
* @return the <code>descriptor_index</code> specifying
* the type descriptor of that member.
* If it is not that member,
* <code>isMember()</code> returns 0.
*/
public int isMember(String classname, String membername, int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
if (getClassInfo(minfo.classIndex).equals(classname)) {
NameAndTypeInfo ntinfo
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if (getUtf8Info(ntinfo.memberName).equals(membername))
return ntinfo.typeDescriptor;
}
return 0; // false
}
/**
* Determines whether <code>CONSTANT_Methodref_info</code>,
* <code>CONSTANT_Fieldref_info</code>, or
* <code>CONSTANT_InterfaceMethodref_info</code> structure
* at the given index has the name and the descriptor
* given as the arguments.
*
* @param membername the member name
* @param desc the descriptor of the member.
* @param index the index into the constant pool table
*
* @return the name of the target class specified by
* the <code>..._info</code> structure
* at <code>index</code>.
* Otherwise, null if that structure does not
* match the given member name and descriptor.
*/
public String eqMember(String membername, String desc, int index)
{
MemberrefInfo minfo = (MemberrefInfo)getItem(index);
NameAndTypeInfo ntinfo
= (NameAndTypeInfo)getItem(minfo.nameAndTypeIndex);
if (getUtf8Info(ntinfo.memberName).equals(membername)
&& getUtf8Info(ntinfo.typeDescriptor).equals(desc))
return getClassInfo(minfo.classIndex);
return null; // false
}
private int addItem0(ConstInfo info)
{
items.addElement(info);
return numOfItems++;
}
private int addItem(ConstInfo info)
{
if (itemsCache == null)
itemsCache = makeItemsCache(items);
ConstInfo found = itemsCache.get(info);
if (found != null)
return found.index;
items.addElement(info);
itemsCache.put(info, info);
return numOfItems++;
}
/**
* Copies the n-th item in this ConstPool object into the destination
* ConstPool object.
* The class names that the item refers to are renamed according
* to the given map.
*
* @param n the <i>n</i>-th item
* @param dest destination constant pool table
* @param classnames the map or null.
* @return the index of the copied item into the destination ClassPool.
*/
public int copy(int n, ConstPool dest, Map<String,String> classnames)
{
if (n == 0)
return 0;
ConstInfo info = getItem(n);
return info.copy(this, dest, classnames);
}
int addConstInfoPadding() {
return addItem0(new ConstInfoPadding(numOfItems));
}
/**
* Adds a new <code>CONSTANT_Class_info</code> structure.
*
* <p>This also adds a <code>CONSTANT_Utf8_info</code> structure
* for storing the class name.
*
* @return the index of the added entry.
*/
public int addClassInfo(CtClass c)
{
if (c == THIS)
return thisClassInfo;
else if (!c.isArray())
return addClassInfo(c.getName());
else {
// an array type is recorded in the hashtable with
// the key "[L<classname>;" instead of "<classname>".
//
// note: toJvmName(toJvmName(c)) is equal to toJvmName(c).
return addClassInfo(Descriptor.toJvmName(c));
}
}
/**
* Adds a new <code>CONSTANT_Class_info</code> structure.
*
* <p>This also adds a <code>CONSTANT_Utf8_info</code> structure
* for storing the class name.
*
* @param qname a fully-qualified class name
* (or the JVM-internal representation of that name).
* @return the index of the added entry.
*/
public int addClassInfo(String qname)
{
int utf8 = addUtf8Info(Descriptor.toJvmName(qname));
return addItem(new ClassInfo(utf8, numOfItems));
}
/**
* Adds a new <code>CONSTANT_NameAndType_info</code> structure.
*