org.objectweb.asm.commons

Class ModuleTargetAttribute

java.lang.Object

org.objectweb.asm.Attribute

org.objectweb.asm.commons.ModuleTargetAttribute

public final class ModuleTargetAttribute
extends Attribute

ModuleTarget attribute. This attribute is specific to the OpenJDK and may change in the future.

Author:

Remi Forax

Field Summary

Fields

Modifier and Type	Field and Description
String	platform

Fields inherited from class org.objectweb.asm.Attribute

type

Constructor Summary

Constructors

Constructor and Description
ModuleTargetAttribute() Constructs an empty attribute that can be used as prototype to be passed as argument of the method ClassReader.accept(org.objectweb.asm.ClassVisitor, Attribute[], int).
ModuleTargetAttribute(String platform) Constructs an attribute with a platform name.

Method Summary

Modifier and Type	Method and Description
protected Attribute	read(ClassReader cr, int off, int len, char[] buf, int codeOff, Label[] labels) Reads a Attribute.type attribute.
protected ByteVector	write(ClassWriter cw, byte[] code, int len, int maxStack, int maxLocals) Returns the byte array form of the content of this attribute.

Methods inherited from class org.objectweb.asm.Attribute

getLabels, isCodeAttribute, isUnknown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

platform

public String platform

Constructor Detail

ModuleTargetAttribute

public ModuleTargetAttribute(String platform)

Constructs an attribute with a platform name.

Parameters:

platform - the platform name on which the module can run.

ModuleTargetAttribute

public ModuleTargetAttribute()

Constructs an empty attribute that can be used as prototype to be passed as argument of the method ClassReader.accept(org.objectweb.asm.ClassVisitor, Attribute[], int).

Method Detail

read

protected Attribute read(ClassReader cr,
                         int off,
                         int len,
                         char[] buf,
                         int codeOff,
                         Label[] labels)

Description copied from class: Attribute

Reads a Attribute.type attribute. This method must return a new Attribute object, of type Attribute.type, corresponding to the 'length' bytes starting at 'offset', in the given ClassReader.

Overrides:

read in class Attribute

Parameters:

cr - the class that contains the attribute to be read.

off - index of the first byte of the attribute's content in ClassReader.b. The 6 attribute header bytes (attribute_name_index and attribute_length) are not taken into account here.

len - the length of the attribute's content (excluding the 6 attribute header bytes).

buf - the buffer to be used to call the ClassReader methods requiring a 'charBuffer' parameter.

codeOff - index of the first byte of content of the enclosing Code attribute in ClassReader.b, or -1 if the attribute to be read is not a code attribute. The 6 attribute header bytes (attribute_name_index and attribute_length) are not taken into account here.

labels - the labels of the method's code, or null if the attribute to be read is not a code attribute.

Returns:

a new Attribute object corresponding to the specified bytes.

write

protected ByteVector write(ClassWriter cw,
                           byte[] code,
                           int len,
                           int maxStack,
                           int maxLocals)

Description copied from class: Attribute

Returns the byte array form of the content of this attribute. The 6 header bytes (attribute_name_index and attribute_length) must not be added in the returned ByteVector.

Overrides:

write in class Attribute

Parameters:

cw - the class to which this attribute must be added. This parameter can be used to add the items that corresponds to this attribute to the constant pool of this class.

code - the bytecode of the method corresponding to this code attribute, or null if this attribute is not a code attribute. Corresponds to the 'code' field of the Code attribute.

len - the length of the bytecode of the method corresponding to this code attribute, or 0 if this attribute is not a code attribute. Corresponds to the 'code_length' field of the Code attribute.

maxStack - the maximum stack size of the method corresponding to this code attribute, or -1 if this attribute is not a code attribute.

maxLocals - the maximum number of local variables of the method corresponding to this code attribute, or -1 if this attribute is not a code attribute.

Returns:

the byte array form of this attribute.