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## org.mortbay.jetty
Class HttpFields

    java.lang.Object
      org.mortbay.jetty.HttpFields

    public class HttpFields

extends Object

HTTP Fields. A collection of HTTP header and or Trailer fields. This class is not synchronized and needs to be protected from concurrent access. This class is not synchronized as it is expected that modifications will only be performed by a single thread.

Author:
  Greg Wilkins (gregw)

Nested Class Summary
`static class` | `HttpFields.Field`

Field Summary
`static String` | `__01Jan1970`
`static Buffer` | `__01Jan1970_BUFFER`
`static DateCache` | `__dateCache`
`static String` | `__separators`
`protected HashMap` | `_bufferMap`
`protected SimpleDateFormat[]` | `_dateReceive`
`protected ArrayList` | `_fields`
`protected int` | `_revision`

Constructor Summary
`HttpFields()` Constructor.

Method Summary
`void` | `add(Buffer name, Buffer value)` Add to or set a field.
`void` | `add(HttpFields fields)` Add fields from another HttpFields instance.
`void` | `add(String name, String value)` Add to or set a field.
`void` | `addDateField(String name, long date)` Sets the value of a date field.
`void` | `addLongField(Buffer name, long value)` Sets the value of an long field.
`void` | `addLongField(String name, long value)` Sets the value of an long field.
`void` | `addSetCookie(Cookie cookie)` Format a set cookie value
`void` | `clear()` Clear the header.
`boolean` | `containsKey(Buffer name)`
`boolean` | `containsKey(String name)`
`void` | `destroy()` Destroy the header.
`static String` | `formatDate(Calendar calendar, boolean cookie)` Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies
`static String` | `formatDate(long date, boolean cookie)` Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies
`static void` | `formatDate(StringBuffer buf, Calendar calendar, boolean cookie)` Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies
`static String` | `formatDate(StringBuffer buf, long date, boolean cookie)` Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies
`Buffer` | `get(Buffer name)`
`long` | `getDateField(String name)` Get a header as a date value.
`Enumeration` | `getFieldNames()` Get enumeration of header _names.
`Iterator` | `getFields()` Get enumeration of Fields Returns an enumeration of Fields for this request.
`long` | `getLongField(Buffer name)` Get a header as an long value.
`long` | `getLongField(String name)` Get a header as an long value.
`static Float` | `getQuality(String value)`
`String` | `getStringField(Buffer name)`
`String` | `getStringField(String name)`
`Enumeration` | `getValues(Buffer name)` Get multi headers
`Enumeration` | `getValues(String name)` Get multi headers
`Enumeration` | `getValues(String name, String separators)` Get multi field values with separator.
`void` | `put(Buffer buffer)`
`void` | `put(Buffer name, Buffer value)` Set a field.
`void` | `put(Buffer name, String value)` Set a field.
`void` | `put(String name, List list)` Set a field.
`void` | `put(String name, String value)` Set a field.
`void` | `putDateField(Buffer name, long date)` Sets the value of a date field.
`void` | `putDateField(String name, long date)` Sets the value of a date field.
`void` | `putLongField(Buffer name, long value)` Sets the value of an long field.
`void` | `putLongField(String name, long value)` Sets the value of an long field.
`static List` | `qualityList(Enumeration e)` List values in quality order.
`void` | `remove(Buffer name)` Remove a field.
`void` | `remove(String name)` Remove a field.
`String` | `toString()`
`static String` | `valueParameters(String value, Map parameters)` Get field value parameters.
`void` | `write(Writer writer)`

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

Field Detail

### __separators

    public static final String __separators

See Also:
  Constant Field Values

### __dateCache

    public static final DateCache __dateCache

### __01Jan1970

    public static final String __01Jan1970

### __01Jan1970_BUFFER

    public static final Buffer __01Jan1970_BUFFER

### _fields

    protected ArrayList _fields

### _revision

    protected int _revision

### _bufferMap

    protected HashMap _bufferMap

### _dateReceive

    protected SimpleDateFormat[] _dateReceive

Constructor Detail

### HttpFields

    public HttpFields()

  Constructor.

Method Detail

### formatDate

    public static String formatDate(long date,
                                    boolean cookie)

  Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies

### formatDate

    public static String formatDate(Calendar calendar,
                                    boolean cookie)

  Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies

### formatDate

    public static String formatDate(StringBuffer buf,
                                    long date,
                                    boolean cookie)

  Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies

### formatDate

    public static void formatDate(StringBuffer buf,
                                  Calendar calendar,
                                  boolean cookie)

  Format HTTP date "EEE, dd MMM yyyy HH:mm:ss 'GMT'" or "EEE, dd-MMM-yy HH:mm:ss 'GMT'"for cookies

### getFieldNames

    public Enumeration getFieldNames()

  Get enumeration of header _names. Returns an enumeration of strings representing the header _names for this request.

### getFields

    public Iterator getFields()

  Get enumeration of Fields Returns an enumeration of Fields for this request.

### containsKey

    public boolean containsKey(Buffer name)

### containsKey

    public boolean containsKey(String name)

### getStringField

    public String getStringField(String name)

  Parameters:
    `name` - the case-insensitive field name
  Returns:
    the value of a field, or null if not found. For multiple fields of the same name, only the first is returned.

### getStringField

    public String getStringField(Buffer name)

  Parameters:
    `name` - the case-insensitive field name
  Returns:
    the value of a field, or null if not found. For multiple fields of the same name, only the first is returned.

### get

    public Buffer get(Buffer name)

  Parameters:
    `name` - the case-insensitive field name
  Returns:
    the value of a field, or null if not found. For multiple fields of the same name, only the first is returned.

### getValues

    public Enumeration getValues(String name)

  Get multi headers

  Parameters:
    `name` - the case-insensitive field name
  Returns:
    Enumeration of the values, or null if no such header.

### getValues

    public Enumeration getValues(Buffer name)

  Get multi headers

  Parameters:
    `name` - the case-insensitive field name
  Returns:
    Enumeration of the value Strings, or null if no such header.

### getValues

    public Enumeration getValues(String name,
                                 String separators)

  Get multi field values with separator. The multiple values can be represented as separate headers of the same name, or by a single header using the separator(s), or a combination of both. Separators may be quoted.

  Parameters:
    `name` - the case-insensitive field name
    `separators` - String of separators.
  Returns:
    Enumeration of the values, or null if no such header.

### put

    public void put(String name,
                    String value)

  Set a field.

  Parameters:
    `name` - the name of the field
    `value` - the value of the field. If null the field is cleared.

### put

    public void put(Buffer name,
                    String value)

  Set a field.

  Parameters:
    `name` - the name of the field
    `value` - the value of the field. If null the field is cleared.

### put

    public void put(Buffer name,
                    Buffer value)

  Set a field.

  Parameters:
    `name` - the name of the field
    `value` - the value of the field. If null the field is cleared.

### put

    public void put(String name,
                    List list)

  Set a field.

  Parameters:
    `name` - the name of the field
    `list` - the List value of the field. If null the field is cleared.

### add

    public void add(String name,
                    String value)
             throws IllegalArgumentException

  Add to or set a field. If the field is allowed to have multiple values, add will add multiple headers of the same name.

  Parameters:
    `name` - the name of the field
    `value` - the value of the field.
  Throws:
    `IllegalArgumentException` - If the name is a single valued field and already has a value.

### add

    public void add(Buffer name,
                    Buffer value)
             throws IllegalArgumentException

  Add to or set a field. If the field is allowed to have multiple values, add will add multiple headers of the same name.

  Parameters:
    `name` - the name of the field
    `value` - the value of the field.
  Throws:
    `IllegalArgumentException` - If the name is a single valued field and already has a value.

### remove

    public void remove(String name)

  Remove a field.

  Parameters:
    `name` -

### remove

    public void remove(Buffer name)

  Remove a field.

  Parameters:
    `name` -

### getLongField

    public long getLongField(String name)
                      throws NumberFormatException

  Get a header as an long value. Returns the value of an integer field or -1 if not found. The case of the field name is ignored.

  Parameters:
    `name` - the case-insensitive field name
  Throws:
    `NumberFormatException` - If bad long found

### getLongField

    public long getLongField(Buffer name)
                      throws NumberFormatException

  Get a header as an long value. Returns the value of an integer field or -1 if not found. The case of the field name is ignored.

  Parameters:
    `name` - the case-insensitive field name
  Throws:
    `NumberFormatException` - If bad long found

### getDateField

    public long getDateField(String name)

  Get a header as a date value. Returns the value of a date field, or -1 if not found. The case of the field name is ignored.

  Parameters:
    `name` - the case-insensitive field name

### putLongField

    public void putLongField(Buffer name,
                             long value)

  Sets the value of an long field.

  Parameters:
    `name` - the field name
    `value` - the field long value

### putLongField

    public void putLongField(String name,
                             long value)

  Sets the value of an long field.

  Parameters:
    `name` - the field name
    `value` - the field long value

### addLongField

    public void addLongField(String name,
                             long value)

  Sets the value of an long field.

  Parameters:
    `name` - the field name
    `value` - the field long value

### addLongField

    public void addLongField(Buffer name,
                             long value)

  Sets the value of an long field.

  Parameters:
    `name` - the field name
    `value` - the field long value

### putDateField

    public void putDateField(Buffer name,
                             long date)

  Sets the value of a date field.

  Parameters:
    `name` - the field name
    `date` - the field date value

### putDateField

    public void putDateField(String name,
                             long date)

  Sets the value of a date field.

  Parameters:
    `name` - the field name
    `date` - the field date value

### addDateField

    public void addDateField(String name,
                             long date)

  Sets the value of a date field.

  Parameters:
    `name` - the field name
    `date` - the field date value

### addSetCookie

    public void addSetCookie(Cookie cookie)

  Format a set cookie value

  Parameters:
    `cookie` - The cookie.
    `cookie2` - If true, use the alternate cookie 2 header

### write

    public void write(Writer writer)
               throws IOException

  Throws:
    `IOException`

### put

    public void put(Buffer buffer)
             throws IOException

  Throws:
    `IOException`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### clear

    public void clear()

  Clear the header.

### destroy

    public void destroy()

  Destroy the header. Help the garbage collector by null everything that we can.

### add

    public void add(HttpFields fields)

  Add fields from another HttpFields instance. Single valued fields are replaced, while all others are added.

  Parameters:
    `fields` -

### valueParameters

    public static String valueParameters(String value,
                                         Map parameters)

  Get field value parameters. Some field values can have parameters. This method separates the value from the parameters and optionally populates a map with the paramters. For example:

       FieldName : Value ; param1=val1 ; param2=val2

  Parameters:
    `value` - The Field value, possibly with parameteres.
    `parameters` - A map to populate with the parameters, or null
  Returns:
    The value.

### getQuality

    public static Float getQuality(String value)

### qualityList

    public static List qualityList(Enumeration e)

  List values in quality order.

  Parameters:
    `enum` - Enumeration of values with quality parameters
  Returns:
    values in quality order.

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