org.luaj.vm2

类 Buffer

java.lang.Object

org.luaj.vm2.Buffer

public final class Buffer
extends Object

String buffer for use in string library methods, optimized for production of StrValue instances.

The buffer can begin initially as a wrapped LuaValue and only when concatenation actually occurs are the bytes first copied.

To convert back to a LuaValue again, the function value() is used.

另请参阅:

LuaValue, LuaValue.buffer(), LuaString

构造器概要

构造器

构造器和说明
Buffer() Create buffer with default capacity
Buffer(int initialCapacity) Create buffer with specified initial capacity
Buffer(LuaValue value) Create buffer with specified initial value

方法概要

限定符和类型	方法和说明
Buffer	append(byte b) Append a single byte to the buffer.
Buffer	append(char c)
Buffer	append(LuaString str) Append a LuaString to the buffer.
Buffer	append(LuaValue val) Append a LuaValue to the buffer.
Buffer	append(String str) Append a Java String to the buffer.
Buffer	concatTo(LuaNumber lhs) Concatenate this buffer onto a LuaNumber The LuaNumber will be converted to a string before concatenating.
Buffer	concatTo(LuaString lhs) Concatenate this buffer onto a LuaString
Buffer	concatTo(LuaValue lhs) Concatenate this buffer onto a LuaValue
void	makeroom(int nbefore, int nafter) Ensure there is enough room before and after the bytes.
Buffer	prepend(LuaString s) Concatenate bytes from a LuaString onto the front of this buffer
Buffer	setvalue(LuaValue value) Set buffer contents as a LuaValue
String	tojstring() Convert the buffer to a Java String
LuaString	tostring() Convert the buffer to a LuaString
String	toString() Convert the buffer to a Java String
LuaValue	value() Get buffer contents as a LuaValue

从类继承的方法 java.lang.Object

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

构造器详细资料

Buffer

public Buffer()

Create buffer with default capacity

另请参阅:

DEFAULT_CAPACITY

Buffer

public Buffer(int initialCapacity)

Create buffer with specified initial capacity

参数:

initialCapacity - the initial capacity

Buffer

public Buffer(LuaValue value)

Create buffer with specified initial value

参数:

value - the initial value

方法详细资料

value

public LuaValue value()

Get buffer contents as a LuaValue

返回:

value as a LuaValue, converting as necessary

setvalue

public Buffer setvalue(LuaValue value)

Set buffer contents as a LuaValue

参数:

value - value to set

tostring

public final LuaString tostring()

Convert the buffer to a LuaString

返回:

the value as a LuaString

tojstring

public String tojstring()

Convert the buffer to a Java String

返回:

the value as a Java String

toString

public String toString()

Convert the buffer to a Java String

覆盖:

toString 在类中 Object

返回:

the value as a Java String

append

public final Buffer append(byte b)

Append a single byte to the buffer.

返回:

this to allow call chaining

append

public final Buffer append(char c)

append

public final Buffer append(LuaValue val)

Append a LuaValue to the buffer.

返回:

this to allow call chaining

append

public final Buffer append(LuaString str)

Append a LuaString to the buffer.

返回:

this to allow call chaining

append

public final Buffer append(String str)

Append a Java String to the buffer. The Java string will be converted to bytes using the UTF8 encoding.

返回:

this to allow call chaining

另请参阅:

LuaString.encodeToUtf8(char[], int, byte[], int)

concatTo

public Buffer concatTo(LuaValue lhs)

Concatenate this buffer onto a LuaValue

参数:

lhs - the left-hand-side value onto which we are concatenating this

返回:

Buffer for use in call chaining.

concatTo

public Buffer concatTo(LuaString lhs)

Concatenate this buffer onto a LuaString

参数:

lhs - the left-hand-side value onto which we are concatenating this

返回:

Buffer for use in call chaining.

concatTo

public Buffer concatTo(LuaNumber lhs)

Concatenate this buffer onto a LuaNumber

The LuaNumber will be converted to a string before concatenating.

参数:

lhs - the left-hand-side value onto which we are concatenating this

返回:

Buffer for use in call chaining.

prepend

public Buffer prepend(LuaString s)

Concatenate bytes from a LuaString onto the front of this buffer

参数:

s - the left-hand-side value which we will concatenate onto the front of this

返回:

Buffer for use in call chaining.

makeroom

public final void makeroom(int nbefore,
                           int nafter)

Ensure there is enough room before and after the bytes.

参数:

nbefore - number of unused bytes which must precede the data after this completes

nafter - number of unused bytes which must follow the data after this completes