java.lang.Object
- org.codehaus.janino.util.ClassFile

```
public class ClassFile
extends Object
```
An object that represents the Java™ "class file" format.
ClassFile(InputStream) creates a ClassFile object from the bytecode read from the given InputStream.
store(OutputStream) generates Java™ bytecode which is suitable for being processed by a Java™ virtual machine.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`ClassFile.AttributeInfo`	Representation of a class file attribute (see JVMS7 4.7).
`static class`	`ClassFile.ConstantClassInfo`	See JVMS7 4.4.1.
`static class`	`ClassFile.ConstantFieldrefInfo`	See JVMS7 4.4.2.
`static class`	`ClassFile.ConstantInterfaceMethodrefInfo`	See JVMS7 4.4.2.
`static class`	`ClassFile.ConstantMethodrefInfo`	See JVMS7 4.4.2.
`static class`	`ClassFile.ConstantNameAndTypeInfo`	See JVMS7 4.4.6.
`static class`	`ClassFile.ConstantPoolInfo`	Base for various the constant pool table entry types.
`static class`	`ClassFile.ConstantUtf8Info`	See JVMS7 4.4.7.
`static class`	`ClassFile.ConstantValueAttribute`	Representation of a "ConstantValue" attribute (see JVMS 4.7.2).
`static class`	`ClassFile.ConstantValuePoolInfo`	Intermediate base class for constant pool table entry types that have 'value' semantics: Double, Float, Integer, Long, String
`static class`	`ClassFile.DeprecatedAttribute`	Representation of a "Deprecated" attribute (see JVMS 4.7.10).
`static class`	`ClassFile.ExceptionsAttribute`	Representation of an "Exceptions" attribute (see JVMS 4.7.4).
`static class`	`ClassFile.FieldInfo`	Representation of a "method_info" structure, as defined by JVMS7 4.5.
`static class`	`ClassFile.InnerClassesAttribute`	Representation of an "InnerClasses" attribute (see JVMS 4.7.5).
`static class`	`ClassFile.LineNumberTableAttribute`	Representation of a "LineNumberTable" attribute (see JVMS 4.7.8).
`static class`	`ClassFile.LocalVariableTableAttribute`	Representation of a "LocalVariableTable" attribute (see JVMS 4.7.9).
`class`	`ClassFile.MethodInfo`	Representation of a "method_info" structure, as defined by JVMS7 4.6.
`static class`	`ClassFile.SourceFileAttribute`	Representation of a "SourceFile" attribute (see JVMS 4.7.7).
`static class`	`ClassFile.SyntheticAttribute`	Representation of a "Synthetic" attribute (see JVMS 4.7.6).

Field Summary

Fields
Modifier and Type	Field	Description
`short`	`accessFlags`	The access flags of the class.
`List<ClassFile.FieldInfo>`	`fieldInfos`	The `ClassFile.FieldInfo`s of the field members of this class or interface.
`short[]`	`interfaces`	The constant pool indexes of `ClassFile.ConstantClassInfo` which describes the interfaces that this class implements, resp.
`static short`	`MAJOR_VERSION_JDK_1_1`
`static short`	`MAJOR_VERSION_JDK_1_2`
`static short`	`MAJOR_VERSION_JDK_1_3`
`static short`	`MAJOR_VERSION_JDK_1_4`
`static short`	`MAJOR_VERSION_JDK_1_5`
`List<ClassFile.MethodInfo>`	`methodInfos`	The `ClassFile.MethodInfo`s of the methods of this class or interface.
`static short`	`MINOR_VERSION_JDK_1_1`
`static short`	`MINOR_VERSION_JDK_1_2`
`static short`	`MINOR_VERSION_JDK_1_3`
`static short`	`MINOR_VERSION_JDK_1_4`
`static short`	`MINOR_VERSION_JDK_1_5`
`short`	`superclass`	The constant pool index of the `ClassFile.ConstantClassInfo` that describes the superclass of THIS class.
`short`	`thisClass`	The constant pool index of the `ClassFile.ConstantClassInfo` that describes THIS class.

Constructor Summary

Constructors
Constructor	Description
`ClassFile(short accessFlags, String thisClassFd, String superclassFd, String[] interfaceFds)`	Construct from parsed components.
`ClassFile(InputStream inputStream)`	Read "class file" data from a `InputStream` and construct a `ClassFile` object from it.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`short`	`addConstantClassInfo(String typeFd)`	Return the constant index number for a "CONSTANT_Class_info" structure to the class file.
`short`	`addConstantDoubleInfo(double value)`	Add a "CONSTANT_Double_info" structure to the class file.
`short`	`addConstantFieldrefInfo(String classFd, String fieldName, String fieldFd)`	Add a "CONSTANT_Fieldref_info" structure to the class file.
`short`	`addConstantFloatInfo(float value)`	Add a "CONSTANT_Float_info" structure to the class file.
`short`	`addConstantIntegerInfo(int value)`	Add a "CONSTANT_Integer_info" structure to the class file.
`short`	`addConstantInterfaceMethodrefInfo(String classFd, String methodName, String methodMd)`	Add a "CONSTANT_InterfaceMethodref_info" structure to the class file.
`short`	`addConstantLongInfo(long value)`	Add a "CONSTANT_Long_info" structure to the class file.
`short`	`addConstantMethodrefInfo(String classFd, String methodName, String methodMd)`	Add a "CONSTANT_Methodref_info" structure to the class file.
`short`	`addConstantStringInfo(String string)`	Add a "CONSTANT_String_info" structure to the class file.
`short`	`addConstantUtf8Info(String s)`	Adds a "CONSTANT_Utf8_info" structure to the class file if no equal entry exists.
`void`	`addDeprecatedAttribute()`	Adds the "Deprecated" attribute to this class.
`ClassFile.FieldInfo`	`addFieldInfo(Java.Modifiers modifiers, String fieldName, String fieldTypeFd, Object optionalConstantValue)`	Creates a `ClassFile.FieldInfo` and adds it to this class.
`void`	`addInnerClassesAttributeEntry(ClassFile.InnerClassesAttribute.Entry e)`	Create an "InnerClasses" attribute if it does not exist, then add the given entry to the "InnerClasses" attribute.
`ClassFile.MethodInfo`	`addMethodInfo(Java.Modifiers modifiers, String methodName, String methodMd)`	Creates a `ClassFile.MethodInfo` and adds it to this class.
`void`	`addSourceFileAttribute(String sourceFileName)`	Adds a "SourceFile" attribute to this class file.
`static String`	`getClassFileResourceName(String className)`	Construct the name of a resource that could contain the class file of the class with the given name.
`ClassFile.ConstantPoolInfo`	`getConstantPoolInfo(short index)`
`int`	`getConstantPoolSize()`
`String`	`getConstantUtf8(short index)`
`ClassFile.InnerClassesAttribute`	`getInnerClassesAttribute()`	Find the "InnerClasses" attribute of this class file
`short`	`getMajorVersion()`
`short`	`getMinorVersion()`
`static String`	`getSourceResourceName(String className)`	Construct the name of a resource that could contain the source code of the class with the given name.
`String`	`getThisClassName()`
`void`	`setVersion(short majorVersion, short minorVersion)`	Sets the major and minor class file version numbers (JVMS 4.1).
`void`	`store(OutputStream os)`	Write `ClassFile` to an `OutputStream`, in "class file" format.
`byte[]`	`toByteArray()`	Return the byte code of this `ClassFile` as a byte array.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - MAJOR_VERSION_JDK_1_1
```
public static final short MAJOR_VERSION_JDK_1_1
```
    See Also:
    
    Constant Field Values
  - MINOR_VERSION_JDK_1_1
```
public static final short MINOR_VERSION_JDK_1_1
```
    See Also:
    
    Constant Field Values
  - MAJOR_VERSION_JDK_1_2
```
public static final short MAJOR_VERSION_JDK_1_2
```
    See Also:
    
    Constant Field Values
  - MINOR_VERSION_JDK_1_2
```
public static final short MINOR_VERSION_JDK_1_2
```
    See Also:
    
    Constant Field Values
  - MAJOR_VERSION_JDK_1_3
```
public static final short MAJOR_VERSION_JDK_1_3
```
    See Also:
    
    Constant Field Values
  - MINOR_VERSION_JDK_1_3
```
public static final short MINOR_VERSION_JDK_1_3
```
    See Also:
    
    Constant Field Values
  - MAJOR_VERSION_JDK_1_4
```
public static final short MAJOR_VERSION_JDK_1_4
```
    See Also:
    
    Constant Field Values
  - MINOR_VERSION_JDK_1_4
```
public static final short MINOR_VERSION_JDK_1_4
```
    See Also:
    
    Constant Field Values
  - MAJOR_VERSION_JDK_1_5
```
public static final short MAJOR_VERSION_JDK_1_5
```
    See Also:
    
    Constant Field Values
  - MINOR_VERSION_JDK_1_5
```
public static final short MINOR_VERSION_JDK_1_5
```
    See Also:
    
    Constant Field Values
  - accessFlags
```
public final short accessFlags
```
    The access flags of the class.
    
    See Also:
    
    and consorts
  - thisClass
```
public final short thisClass
```
    The constant pool index of the ClassFile.ConstantClassInfo that describes THIS class.
  - superclass
```
public final short superclass
```
    The constant pool index of the ClassFile.ConstantClassInfo that describes the superclass of THIS class. Zero for class Object, Object for interfaces.
  - interfaces
```
public final short[] interfaces
```
    The constant pool indexes of ClassFile.ConstantClassInfo which describes the interfaces that this class implements, resp. that this interface extends.
  - fieldInfos
```
public final List<ClassFile.FieldInfo> fieldInfos
```
    The ClassFile.FieldInfos of the field members of this class or interface.
  - methodInfos
```
public final List<ClassFile.MethodInfo> methodInfos
```
    The ClassFile.MethodInfos of the methods of this class or interface.
- Constructor Detail
  - ClassFile
```
public ClassFile(short accessFlags,
                 String thisClassFd,
                 String superclassFd,
                 String[] interfaceFds)
```
    Construct from parsed components.
    
    Parameters:
    
    accessFlags - as defined by Mod
    
    thisClassFd - the field descriptor for this class
    
    superclassFd - the field descriptor for the extended class (e.g. "Ljava/lang/Object;")
    
    interfaceFds - the field descriptors for the implemented interfaces
  - ClassFile
```
public ClassFile(InputStream inputStream)
          throws IOException
```
    Read "class file" data from a InputStream and construct a ClassFile object from it.
    If the ClassFile is created with this constructor, then most modifying operations lead to a UnsupportedOperationException; only fields, methods and attributes can be added.
    
    Throws:
    
    IOException
- Method Detail
  - addSourceFileAttribute
```
public void addSourceFileAttribute(String sourceFileName)
```
    Adds a "SourceFile" attribute to this class file. (Does not check whether one exists already.)
    
    Parameters:
    
    sourceFileName -
  - addDeprecatedAttribute
```
public void addDeprecatedAttribute()
```
    Adds the "Deprecated" attribute to this class.
  - getInnerClassesAttribute
```
public ClassFile.InnerClassesAttribute getInnerClassesAttribute()
```
    Find the "InnerClasses" attribute of this class file
    
    Returns:
    
    null if this class has no "InnerClasses" attribute
  - addInnerClassesAttributeEntry
```
public void addInnerClassesAttributeEntry(ClassFile.InnerClassesAttribute.Entry e)
```
    Create an "InnerClasses" attribute if it does not exist, then add the given entry to the "InnerClasses" attribute.
    
    Parameters:
    
    e -
  - getThisClassName
```
public String getThisClassName()
```
    Returns:
    
    The fully qualified name of this class, e.g. "pkg1.pkg2.Outer$Inner"
  - setVersion
```
public void setVersion(short majorVersion,
                       short minorVersion)
```
    Sets the major and minor class file version numbers (JVMS 4.1). The class file version defaults to the JDK 1.1 values (45.3) which execute on virtually every JVM.
  - getMajorVersion
```
public short getMajorVersion()
```
    Returns:
    
    The current major class file version number
  - getMinorVersion
```
public short getMinorVersion()
```
    Returns:
    
    The current minor class file version number
  - addConstantClassInfo
```
public short addConstantClassInfo(String typeFd)
```
    Return the constant index number for a "CONSTANT_Class_info" structure to the class file. If the class hasn't been added before, add it to the constant pool. Otherwise return the constant number for that element of the pool.
    
    See Also:
    
    JVM specification, section 4.4.1
  - addConstantFieldrefInfo
```
public short addConstantFieldrefInfo(String classFd,
                                     String fieldName,
                                     String fieldFd)
```
    Add a "CONSTANT_Fieldref_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.2
  - addConstantMethodrefInfo
```
public short addConstantMethodrefInfo(String classFd,
                                      String methodName,
                                      String methodMd)
```
    Add a "CONSTANT_Methodref_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.2
  - addConstantInterfaceMethodrefInfo
```
public short addConstantInterfaceMethodrefInfo(String classFd,
                                               String methodName,
                                               String methodMd)
```
    Add a "CONSTANT_InterfaceMethodref_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.2
  - addConstantStringInfo
```
public short addConstantStringInfo(String string)
```
    Add a "CONSTANT_String_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.3
  - addConstantIntegerInfo
```
public short addConstantIntegerInfo(int value)
```
    Add a "CONSTANT_Integer_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.4
  - addConstantFloatInfo
```
public short addConstantFloatInfo(float value)
```
    Add a "CONSTANT_Float_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.4
  - addConstantLongInfo
```
public short addConstantLongInfo(long value)
```
    Add a "CONSTANT_Long_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.5
  - addConstantDoubleInfo
```
public short addConstantDoubleInfo(double value)
```
    Add a "CONSTANT_Double_info" structure to the class file.
    
    See Also:
    
    JVM specification, section 4.4.5
  - addConstantUtf8Info
```
public short addConstantUtf8Info(String s)
```
    Adds a "CONSTANT_Utf8_info" structure to the class file if no equal entry exists.
    
    Returns:
    
    The index of the already existing or newly created entry
    
    See Also:
    
    JVM specification, section 4.4.7
  - addFieldInfo
```
public ClassFile.FieldInfo addFieldInfo(Java.Modifiers modifiers,
                                        String fieldName,
                                        String fieldTypeFd,
                                        Object optionalConstantValue)
```
    Creates a ClassFile.FieldInfo and adds it to this class. The return value can be used e.g. to add attributes (Deprecated, ...) to the field.
  - addMethodInfo
```
public ClassFile.MethodInfo addMethodInfo(Java.Modifiers modifiers,
                                          String methodName,
                                          String methodMd)
```
    Creates a ClassFile.MethodInfo and adds it to this class. The return value can be used e.g. to add attributes (Code, Deprecated, Exceptions, ...) to the method.
  - getConstantPoolInfo
```
public ClassFile.ConstantPoolInfo getConstantPoolInfo(short index)
```
    Returns:
    
    The (read-only) constant pool entry indexed by index
  - getConstantPoolSize
```
public int getConstantPoolSize()
```
    Returns:
    
    The size of the constant pool
  - getConstantUtf8
```
public String getConstantUtf8(short index)
```
    Parameters:
    
    index - Index to a CONSTANT_Utf8_info in the constant pool
    
    Returns:
    
    The string represented by the structure
  - store
```
public void store(OutputStream os)
           throws IOException
```
    Write ClassFile to an OutputStream, in "class file" format.
    Notice that if an IOException is thrown, the class file is probably written incompletely and thus invalid. The calling method must take care of this situation, e.g. by closing the output stream and then deleting the file.
    
    Parameters:
    
    os -
    
    Throws:
    
    IOException
  - getSourceResourceName
```
public static String getSourceResourceName(String className)
```
    Construct the name of a resource that could contain the source code of the class with the given name.
    Notice that member types are declared inside a different type, so the relevant source file is that of the outermost declaring class.
    
    Parameters:
    
    className - Fully qualified class name, e.g. "pkg1.pkg2.Outer$Inner"
    
    Returns:
    
    the name of the resource, e.g. "pkg1/pkg2/Outer.java"
  - getClassFileResourceName
```
public static String getClassFileResourceName(String className)
```
    Construct the name of a resource that could contain the class file of the class with the given name.
    
    Parameters:
    
    className - Fully qualified class name, e.g. "pkg1.pkg2.Outer$Inner"
    
    Returns:
    
    the name of the resource, e.g. "pkg1/pkg2/Outer$Inner.class"
  - toByteArray
```
public byte[] toByteArray()
```
    Return the byte code of this ClassFile as a byte array.

Class ClassFile

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

MAJOR_VERSION_JDK_1_1

MINOR_VERSION_JDK_1_1

MAJOR_VERSION_JDK_1_2

MINOR_VERSION_JDK_1_2

MAJOR_VERSION_JDK_1_3

MINOR_VERSION_JDK_1_3

MAJOR_VERSION_JDK_1_4

MINOR_VERSION_JDK_1_4

MAJOR_VERSION_JDK_1_5

MINOR_VERSION_JDK_1_5

accessFlags

thisClass

superclass

interfaces

fieldInfos

methodInfos

Constructor Detail

ClassFile

ClassFile

Method Detail

addSourceFileAttribute

addDeprecatedAttribute

getInnerClassesAttribute

addInnerClassesAttributeEntry

getThisClassName

setVersion

getMajorVersion

getMinorVersion

addConstantClassInfo

addConstantFieldrefInfo

addConstantMethodrefInfo

addConstantInterfaceMethodrefInfo

addConstantStringInfo

addConstantIntegerInfo

addConstantFloatInfo

addConstantLongInfo

addConstantDoubleInfo

addConstantUtf8Info

addFieldInfo

addMethodInfo

getConstantPoolInfo

getConstantPoolSize

getConstantUtf8

store

getSourceResourceName

getClassFileResourceName

toByteArray