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## org.w3c.www.http
Class BasicValue

    java.lang.Object
      |
      +--org.w3c.www.http.BasicValue

Direct Known Subclasses:
  HttpAccept, HttpAcceptCharset, HttpAcceptCharsetList, HttpAcceptEncoding, HttpAcceptEncodingList, HttpAcceptLanguage, HttpAcceptLanguageList, HttpAcceptList, HttpBag, HttpCacheControl, HttpChallenge, HttpContentRange, HttpCookieList, HttpCredential, HttpDate, HttpEntityTag, HttpEntityTagList, HttpExtList, HttpInteger, HttpMimeType, HttpParamList, HttpRange, HttpRangeList, HttpSetCookieList, HttpString, HttpTokenList, HttpWarning, HttpWarningList

public abstract class BasicValue
extends java.lang.Object
implements HeaderValue, java.lang.Cloneable

Field Summary
`protected boolean` | `isValid` Are the parsed values up to date with the lastly set unparsed value ?
`protected byte[]` | `raw` The header value, as a byte array, if available.
`protected int` | `rlen` The length of the byte value in case the above buffer is shared.
`protected int` | `roff` The offset of the value in the above buffer, in case the buffer is shared.

Method Summary
`void` | `addBytes(byte[] buf, int off, int len)` HeaderValue implementation - Add these bytes to the header raw value.
`void` | `appendValue(org.w3c.www.http.HttpBuffer buf)` Append this header value to the given output buffer.
`protected void` | `checkByteValue()` Compute the new RFC822 compatible representation of this header value.
`void` | `emit(java.io.OutputStream out)` HeaderValue implementation - Emit this header value to the given output stream.
`protected void` | `error(java.lang.String msg)` Emit a parsing error.
`abstract java.lang.Object` | `getValue()` HeaderValue implemenntation - Get this header value.
`protected void` | `invalidateByteValue()` Invalidate the current byte value for this header, if any.
`protected abstract void` | `parse()` Parse this header value into its various components.
`void` | `setBytes(byte[] buf, int off, int len)` HeaderValue implementation - Reset the header byte value.
`void` | `setString(java.lang.String strval)` Set this Header Value by parsing the given String.
`java.lang.String` | `toExternalForm()` Return a String encoding this header value in an HTTP compatible way.
`java.lang.String` | `toString()` Print this header value as it would be emited.
`protected abstract void` | `updateByteValue()` Update the RFC822 compatible header value for this object.
`protected void` | `validate()` Validate the parsed value according to the last set raw value.

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

Field Detail

### raw

    protected byte[] raw

  The header value, as a byte array, if available.

### roff

    protected int roff

  The offset of the value in the above buffer, in case the buffer is shared.

### rlen

    protected int rlen

  The length of the byte value in case the above buffer is shared.

### isValid

    protected boolean isValid

  Are the parsed values up to date with the lastly set unparsed value ?

Method Detail

### parse

    protected abstract void parse()
                           throws HttpParserException

  Parse this header value into its various components.
  Throws:
    HttpParserException - if unable to parse.

### updateByteValue

    protected abstract void updateByteValue()

  Update the RFC822 compatible header value for this object.

### checkByteValue

    protected final void checkByteValue()

  Compute the new RFC822 compatible representation of this header value. If our value is up to date, we just return, otherwise, the abstract `updateByteValue` is called to perform the job.

### validate

    protected final void validate()
                           throws HttpInvalidValueException

  Validate the parsed value according to the last set raw value. This will trigger the header value parsing, if it is required at this point.
  Throws:
    HttpInvalidValueException - If the value couldn't be parsed properly.

### invalidateByteValue

    protected void invalidateByteValue()

  Invalidate the current byte value for this header, if any.

### error

    protected void error(java.lang.String msg)
                  throws HttpParserException

  Emit a parsing error.
  Parameters:
    `msg` - The error message.
  Throws:
    HttpParserException - If the parsing failed.

### appendValue

    public void appendValue(org.w3c.www.http.HttpBuffer buf)

  Append this header value to the given output buffer.
  Specified by:
    appendValue in interface HeaderValue
  Returns:
    The header value as a byte array.

### toExternalForm

    public java.lang.String toExternalForm()

  Return a String encoding this header value in an HTTP compatible way.
  Specified by:
    toExternalForm in interface HeaderValue
  Returns:
    A String.

### toString

    public java.lang.String toString()

  Print this header value as it would be emited.
  Overrides:
    toString in class java.lang.Object
  Returns:
    A String representation of this header value.

### emit

    public void emit(java.io.OutputStream out)
              throws java.io.IOException

  HeaderValue implementation - Emit this header value to the given output stream.
  Specified by:
    emit in interface HeaderValue
  Parameters:
    `out` - The output stream to emit the header value to.
  Throws:
    java.io.IOException - If some IO error occured.

### addBytes

    public void addBytes(byte[] buf,
                         int off,
                         int len)

  HeaderValue implementation - Add these bytes to the header raw value.
  Specified by:
    addBytes in interface HeaderValue
  Parameters:
    `buf` - The byte buffer containing some part of the header value.
    `off` - The offset of the header value in above buffer.
    `len` - The length of the header value in above buffer.

### setBytes

    public void setBytes(byte[] buf,
                         int off,
                         int len)

  HeaderValue implementation - Reset the header byte value.
  Specified by:
    setBytes in interface HeaderValue
  Parameters:
    `buf` - The byte buffer containing some part of the header value.
    `off` - The offset of the header value in above buffer.
    `len` - The length of the header value in above buffer.

### setString

    public void setString(java.lang.String strval)

  Set this Header Value by parsing the given String.
  Parameters:
    `strval` - The String value for that object.
  Returns:
    Itself.

### getValue

    public abstract java.lang.Object getValue()

  HeaderValue implemenntation - Get this header value.
  Specified by:
    getValue in interface HeaderValue
  Returns:
    An object representing the parsed value for this header.

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