package javassist.bytecode;
import java.io.
DataInputStream;
import java.io.
IOException;
import java.util.
Map;
/**
* <code>MethodParameters_attribute</code>.
*/
public class
MethodParametersAttribute extends
AttributeInfo {
/**
* The name of this attribute <code>"MethodParameters"</code>.
*/
public static final
String tag = "MethodParameters";
MethodParametersAttribute(
ConstPool cp, int
n,
DataInputStream in)
throws
IOException
{
super(
cp,
n,
in);
}
/**
* Constructs an attribute.
*
* @param cp a constant pool table.
* @param names an array of parameter names.
* The i-th element is the name of the i-th parameter.
* @param flags an array of parameter access flags.
*/
public
MethodParametersAttribute(
ConstPool cp,
String[]
names, int[]
flags) {
super(
cp,
tag);
byte[]
data = new byte[
names.length * 4 + 1];
data[0] = (byte)
names.length;
for (int
i = 0;
i <
names.length;
i++) {
ByteArray.
write16bit(
cp.
addUtf8Info(
names[
i]),
data,
i * 4 + 1);
ByteArray.
write16bit(
flags[
i],
data,
i * 4 + 3);
}
set(
data);
}
/**
* Returns <code>parameters_count</code>, which is the number of
* parameters.
*/
public int
size() {
return
info[0] & 0xff;
}
/**
* Returns the value of <code>name_index</code> of the i-th element of <code>parameters</code>.
*
* @param i the position of the parameter.
*/
public int
name(int
i) {
return
ByteArray.
readU16bit(
info,
i * 4 + 1);
}
/**
* Returns the value of <code>access_flags</code> of the i-th element of <code>parameters</code>.
*
* @param i the position of the parameter.
* @see AccessFlag
*/
public int
accessFlags(int
i) {
return
ByteArray.
readU16bit(
info,
i * 4 + 3);
}
/**
* Makes a copy.
*
* @param newCp the constant pool table used by the new copy.
* @param classnames ignored.
*/
public
AttributeInfo copy(
ConstPool newCp,
Map classnames) {
int
s =
size();
ConstPool cp =
getConstPool();
String[]
names = new
String[
s];
int[]
flags = new int[
s];
for (int
i = 0;
i <
s;
i++) {
names[
i] =
cp.
getUtf8Info(
name(
i));
flags[
i] =
accessFlags(
i);
}
return new
MethodParametersAttribute(
newCp,
names,
flags);
}
}