public class ASCIIUtil
extends java.lang.Object
Constructor and Description |
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ASCIIUtil() |
Modifier and Type | Method and Description |
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static java.lang.String |
fold(int used,
java.lang.String s)
Perform RFC 2047 text folding on a string of text.
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static java.lang.String |
getBinaryTransferEncoding(java.io.InputStream content)
Determine if the transfer encoding looks like it might be
valid ascii text, and thus transferable as 7bit code.
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static java.lang.String |
getTextTransferEncoding(java.io.InputStream content)
Examine a stream of text and make a judgement on what encoding
type should be used for the text.
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static java.lang.String |
getTextTransferEncoding(java.lang.String content)
Examine a stream of text and make a judgement on what encoding
type should be used for the text.
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static boolean |
isAscii(int ch)
Test to see if a given character can be considered "valid" ASCII.
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static boolean |
isAscii(java.lang.String s)
Test to see if this string contains only US-ASCII (i.e., 7-bit
ASCII) charactes.
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static java.lang.String |
unfold(java.lang.String s)
Unfold a folded string.
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public static boolean isAscii(java.lang.String s)
s
- The test string.public static boolean isAscii(int ch)
ch
- The test character.public static java.lang.String getTextTransferEncoding(java.io.InputStream content) throws java.io.IOException
content
- An input stream for the content we're examining.java.io.IOException
public static java.lang.String getTextTransferEncoding(java.lang.String content)
content
- A string for the content we're examining.public static java.lang.String getBinaryTransferEncoding(java.io.InputStream content) throws java.io.IOException
content
- An input stream for the content we're examining.java.io.IOException
public static java.lang.String fold(int used, java.lang.String s)
used
- The amount of text already "used up" on this line. This is
typically the length of a message header that this text
get getting added to.s
- The text to fold.public static java.lang.String unfold(java.lang.String s)
s
- The folded string.