Class ReadOnlyHttpHeaders

java.lang.Object

io.netty.handler.codec.http.HttpHeaders

io.netty.handler.codec.http.ReadOnlyHttpHeaders

All Implemented Interfaces:

Iterable<Map.Entry<String,String>>

@UnstableApi
public final class ReadOnlyHttpHeaders
extends HttpHeaders

A variant of HttpHeaders which only supports read-only methods.

Any array passed to this class may be used directly in the underlying data structures of this class. If these arrays may be modified it is the caller's responsibility to supply this class with a copy of the array.

This may be a good alternative to DefaultHttpHeaders if your have a fixed set of headers which will not change.

Nested Class Summary

Nested classes/interfaces inherited from class HttpHeaders

HttpHeaders.Names, HttpHeaders.Values

Field Summary

Fields inherited from class HttpHeaders

EMPTY_HEADERS

Constructor Summary

Constructors

Constructor	Description
ReadOnlyHttpHeaders(boolean validateHeaders, CharSequence... nameValuePairs)	Create a new instance.

Method Summary

Modifier and Type	Method	Description
HttpHeaders	add(String name, Iterable<?> values)
HttpHeaders	add(String name, Object value)
HttpHeaders	addInt(CharSequence name, int value)	Add the name to value.
HttpHeaders	addShort(CharSequence name, short value)	Add the name to value.
HttpHeaders	clear()	Removes all headers from this HttpMessage.
boolean	contains(String name)
boolean	contains(String name, String value, boolean ignoreCase)
boolean	containsValue(CharSequence name, CharSequence value, boolean ignoreCase)	Returns true if a header with the name and value exists, false otherwise.
List<Map.Entry<String,String>>	entries()	Returns a new List that contains all headers in this object.
String	get(String name)
List<String>	getAll(String name)
Integer	getInt(CharSequence name)	Returns the integer value of a header with the specified name.
int	getInt(CharSequence name, int defaultValue)	Returns the integer value of a header with the specified name.
Short	getShort(CharSequence name)	Returns the short value of a header with the specified name.
short	getShort(CharSequence name, short defaultValue)	Returns the short value of a header with the specified name.
Long	getTimeMillis(CharSequence name)	Returns the date value of a header with the specified name.
long	getTimeMillis(CharSequence name, long defaultValue)	Returns the date value of a header with the specified name.
boolean	isEmpty()	Checks if no header exists.
Iterator<Map.Entry<String,String>>	iterator()
Iterator<Map.Entry<CharSequence, CharSequence>>	iteratorCharSequence()
Set<String>	names()	Returns a new Set that contains the names of all headers in this object.
HttpHeaders	remove(String name)
HttpHeaders	set(String name, Iterable<?> values)
HttpHeaders	set(String name, Object value)
HttpHeaders	setInt(CharSequence name, int value)	Set the name to value.
HttpHeaders	setShort(CharSequence name, short value)	Set the name to value.
int	size()	Returns the number of headers in this object.
Iterator<CharSequence>	valueCharSequenceIterator(CharSequence name)	Equivalent to HttpHeaders.getAll(String) but it is possible that no intermediate list is generated.
Iterator<String>	valueStringIterator(CharSequence name)	Equivalent to HttpHeaders.getAll(String) but it is possible that no intermediate list is generated.

Methods inherited from class HttpHeaders

add, add, add, addDateHeader, addDateHeader, addHeader, addHeader, addIntHeader, addIntHeader, clearHeaders, contains, contains, copy, encodeAscii, equalsIgnoreCase, get, get, getAll, getAllAsString, getAsString, getContentLength, getContentLength, getDate, getDate, getDateHeader, getDateHeader, getDateHeader, getDateHeader, getHeader, getHeader, getHeader, getHeader, getHost, getHost, getIntHeader, getIntHeader, getIntHeader, getIntHeader, is100ContinueExpected, isContentLengthSet, isKeepAlive, isTransferEncodingChunked, iteratorAsString, newEntity, remove, removeHeader, removeHeader, removeTransferEncodingChunked, set, set, set, set100ContinueExpected, set100ContinueExpected, setAll, setContentLength, setDate, setDateHeader, setDateHeader, setDateHeader, setDateHeader, setHeader, setHeader, setHeader, setHeader, setHost, setHost, setIntHeader, setIntHeader, setIntHeader, setIntHeader, setKeepAlive, setTransferEncodingChunked, toString

Methods inherited from class Object

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

Methods inherited from interface Iterable

forEach, spliterator

Constructor Details

ReadOnlyHttpHeaders

public ReadOnlyHttpHeaders(boolean validateHeaders,
 CharSequence... nameValuePairs)

Create a new instance.

Parameters:

validateHeaders - true to validate the contents of each header name.

nameValuePairs - An array of the structure [<name,value>,<name,value>,...]. A copy will NOT be made of this array. If the contents of this array may be modified externally you are responsible for passing in a copy.

Method Details

get

public String get(String name)

Specified by:

get in class HttpHeaders

See Also:

• HttpHeaders.get(CharSequence)

getInt

public Integer getInt(CharSequence name)

Description copied from class: HttpHeaders

Returns the integer value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getInt in class HttpHeaders

Parameters:

name - the name of the header to search

Returns:

the first header value if the header is found and its value is an integer. null if there's no such header or its value is not an integer.

getInt

public int getInt(CharSequence name,
 int defaultValue)

Description copied from class: HttpHeaders

Returns the integer value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getInt in class HttpHeaders

Parameters:

name - the name of the header to search

defaultValue - the default value

Returns:

the first header value if the header is found and its value is an integer. defaultValue if there's no such header or its value is not an integer.

getShort

public Short getShort(CharSequence name)

Description copied from class: HttpHeaders

Returns the short value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getShort in class HttpHeaders

Parameters:

name - the name of the header to search

Returns:

the first header value if the header is found and its value is a short. null if there's no such header or its value is not a short.

getShort

public short getShort(CharSequence name,
 short defaultValue)

Description copied from class: HttpHeaders

Returns the short value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getShort in class HttpHeaders

Parameters:

name - the name of the header to search

defaultValue - the default value

Returns:

the first header value if the header is found and its value is a short. defaultValue if there's no such header or its value is not a short.

getTimeMillis

public Long getTimeMillis(CharSequence name)

Description copied from class: HttpHeaders

Returns the date value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getTimeMillis in class HttpHeaders

Parameters:

name - the name of the header to search

Returns:

the first header value if the header is found and its value is a date. null if there's no such header or its value is not a date.

getTimeMillis

public long getTimeMillis(CharSequence name,
 long defaultValue)

Description copied from class: HttpHeaders

Returns the date value of a header with the specified name. If there are more than one values for the specified name, the first value is returned.

Specified by:

getTimeMillis in class HttpHeaders

Parameters:

name - the name of the header to search

defaultValue - the default value

Returns:

the first header value if the header is found and its value is a date. defaultValue if there's no such header or its value is not a date.

getAll

public List<String> getAll(String name)

Specified by:

getAll in class HttpHeaders

See Also:

• HttpHeaders.getAll(CharSequence)

entries

public List<Map.Entry<String,String>> entries()

Description copied from class: HttpHeaders

Returns a new List that contains all headers in this object. Note that modifying the returned List will not affect the state of this object. If you intend to enumerate over the header entries only, use HttpHeaders.iterator() instead, which has much less overhead.

Specified by:

entries in class HttpHeaders

See Also:

• HttpHeaders.iteratorCharSequence()

contains

public boolean contains(String name)

Specified by:

contains in class HttpHeaders

See Also:

• HttpHeaders.contains(CharSequence)

contains

public boolean contains(String name,
 String value,
 boolean ignoreCase)

Overrides:

contains in class HttpHeaders

See Also:

• HttpHeaders.contains(CharSequence, CharSequence, boolean)

containsValue

public boolean containsValue(CharSequence name,
 CharSequence value,
 boolean ignoreCase)

Description copied from class: HttpHeaders

Returns true if a header with the name and value exists, false otherwise. This also handles multiple values that are separated with a ,.

If ignoreCase is true then a case insensitive compare is done on the value.

Overrides:

containsValue in class HttpHeaders

Parameters:

name - the name of the header to find

value - the value of the header to find

ignoreCase - true then a case insensitive compare is run to compare values. otherwise a case sensitive compare is run to compare values.

valueStringIterator

public Iterator<String> valueStringIterator(CharSequence name)

Description copied from class: HttpHeaders

Equivalent to HttpHeaders.getAll(String) but it is possible that no intermediate list is generated.

Overrides:

valueStringIterator in class HttpHeaders

Parameters:

name - the name of the header to retrieve

Returns:

an Iterator of header values corresponding to name.

valueCharSequenceIterator

public Iterator<CharSequence> valueCharSequenceIterator(CharSequence name)

Description copied from class: HttpHeaders

Equivalent to HttpHeaders.getAll(String) but it is possible that no intermediate list is generated.

Overrides:

valueCharSequenceIterator in class HttpHeaders

Parameters:

name - the name of the header to retrieve

Returns:

an Iterator of header values corresponding to name.

iterator

public Iterator<Map.Entry<String,String>> iterator()

Specified by:

iterator in interface Iterable<Map.Entry<String,String>>

Specified by:

iterator in class HttpHeaders

iteratorCharSequence

public Iterator<Map.Entry<CharSequence, CharSequence>> iteratorCharSequence()

Specified by:

iteratorCharSequence in class HttpHeaders

Returns:

Iterator over the name/value header pairs.

isEmpty

public boolean isEmpty()

Description copied from class: HttpHeaders

Checks if no header exists.

Specified by:

isEmpty in class HttpHeaders

size

public int size()

Description copied from class: HttpHeaders

Returns the number of headers in this object.

Specified by:

size in class HttpHeaders

names

public Set<String> names()

Description copied from class: HttpHeaders

Returns a new Set that contains the names of all headers in this object. Note that modifying the returned Set will not affect the state of this object. If you intend to enumerate over the header entries only, use HttpHeaders.iterator() instead, which has much less overhead.

Specified by:

names in class HttpHeaders

add

public HttpHeaders add(String name,
 Object value)

Specified by:

add in class HttpHeaders

See Also:

• HttpHeaders.add(CharSequence, Object)

add

public HttpHeaders add(String name,
 Iterable<?> values)

Specified by:

add in class HttpHeaders

See Also:

• HttpHeaders.add(CharSequence, Iterable)

addInt

public HttpHeaders addInt(CharSequence name,
 int value)

Description copied from class: HttpHeaders

Add the name to value.

Specified by:

addInt in class HttpHeaders

Parameters:

name - The name to modify

value - The value

Returns:

this

addShort

public HttpHeaders addShort(CharSequence name,
 short value)

Description copied from class: HttpHeaders

Add the name to value.

Specified by:

addShort in class HttpHeaders

Parameters:

name - The name to modify

value - The value

Returns:

this

set

public HttpHeaders set(String name,
 Object value)

Specified by:

set in class HttpHeaders

See Also:

• HttpHeaders.set(CharSequence, Object)

set

public HttpHeaders set(String name,
 Iterable<?> values)

Specified by:

set in class HttpHeaders

See Also:

• HttpHeaders.set(CharSequence, Iterable)

setInt

public HttpHeaders setInt(CharSequence name,
 int value)

Description copied from class: HttpHeaders

Set the name to value. This will remove all previous values associated with name.

Specified by:

setInt in class HttpHeaders

Parameters:

name - The name to modify

value - The value

Returns:

this

setShort

public HttpHeaders setShort(CharSequence name,
 short value)

Description copied from class: HttpHeaders

Set the name to value. This will remove all previous values associated with name.

Specified by:

setShort in class HttpHeaders

Parameters:

name - The name to modify

value - The value

Returns:

this

remove

public HttpHeaders remove(String name)

Specified by:

remove in class HttpHeaders

See Also:

• HttpHeaders.remove(CharSequence)

clear

public HttpHeaders clear()

Description copied from class: HttpHeaders

Removes all headers from this HttpMessage.

Specified by:

clear in class HttpHeaders

Returns:

this