| Methods Summary |
|---|
| public java.lang.String | get(java.lang.String name)Retrieve the value associated with the given name, or null if there
is no current association.
return (String)parameters.get(name.trim().toLowerCase(Locale.ENGLISH));
|
| public java.util.Enumeration | getNames()Retrieve an enumeration of all the names in this list.
return parameters.keys();
|
| public boolean | isEmpty()Determine whether or not this list is empty.
return parameters.isEmpty();
|
| private static boolean | isTokenChar(char c)Determine whether or not a given character belongs to a legal token.
return ((c > 040) && (c < 0177)) && (TSPECIALS.indexOf(c) < 0);
|
| protected void | parse(java.lang.String parameterList)A routine for parsing the parameter list out of a String.
if (parameterList == null)
return;
int length = parameterList.length();
if (length <= 0)
return;
int i;
char c;
for (i = skipWhiteSpace(parameterList, 0);
i < length && (c = parameterList.charAt(i)) == ';";
i = skipWhiteSpace(parameterList, i)) {
int lastIndex;
String name;
String value;
// eat the ';'
i++;
// now parse the parameter name
// skip whitespace
i = skipWhiteSpace(parameterList, i);
// tolerate trailing semicolon, even though it violates the spec
if (i >= length)
return;
// find the end of the token char run
lastIndex = i;
while ((i < length) && isTokenChar(parameterList.charAt(i)))
i++;
name = parameterList.substring(lastIndex, i).
toLowerCase(Locale.ENGLISH);
// now parse the '=' that separates the name from the value
i = skipWhiteSpace(parameterList, i);
if (i >= length || parameterList.charAt(i) != '=")
throw new MimeTypeParseException(
"Couldn't find the '=' that separates a " +
"parameter name from its value.");
// eat it and parse the parameter value
i++;
i = skipWhiteSpace(parameterList, i);
if (i >= length)
throw new MimeTypeParseException(
"Couldn't find a value for parameter named " + name);
// now find out whether or not we have a quoted value
c = parameterList.charAt(i);
if (c == '"") {
// yup it's quoted so eat it and capture the quoted string
i++;
if (i >= length)
throw new MimeTypeParseException(
"Encountered unterminated quoted parameter value.");
lastIndex = i;
// find the next unescaped quote
while (i < length) {
c = parameterList.charAt(i);
if (c == '"")
break;
if (c == '\\") {
// found an escape sequence
// so skip this and the
// next character
i++;
}
i++;
}
if (c != '"")
throw new MimeTypeParseException(
"Encountered unterminated quoted parameter value.");
value = unquote(parameterList.substring(lastIndex, i));
// eat the quote
i++;
} else if (isTokenChar(c)) {
// nope it's an ordinary token so it
// ends with a non-token char
lastIndex = i;
while (i < length && isTokenChar(parameterList.charAt(i)))
i++;
value = parameterList.substring(lastIndex, i);
} else {
// it ain't a value
throw new MimeTypeParseException(
"Unexpected character encountered at index " + i);
}
// now put the data into the hashtable
parameters.put(name, value);
}
if (i < length) {
throw new MimeTypeParseException(
"More characters encountered in input than expected.");
}
|
| private static java.lang.String | quote(java.lang.String value)A routine that knows how and when to quote and escape the given value.
boolean needsQuotes = false;
// check to see if we actually have to quote this thing
int length = value.length();
for (int i = 0; (i < length) && !needsQuotes; i++) {
needsQuotes = !isTokenChar(value.charAt(i));
}
if (needsQuotes) {
StringBuffer buffer = new StringBuffer();
buffer.ensureCapacity((int)(length * 1.5));
// add the initial quote
buffer.append('"");
// add the properly escaped text
for (int i = 0; i < length; ++i) {
char c = value.charAt(i);
if ((c == '\\") || (c == '""))
buffer.append('\\");
buffer.append(c);
}
// add the closing quote
buffer.append('"");
return buffer.toString();
} else {
return value;
}
|
| public void | remove(java.lang.String name)Remove any value associated with the given name.
parameters.remove(name.trim().toLowerCase(Locale.ENGLISH));
|
| public void | set(java.lang.String name, java.lang.String value)Set the value to be associated with the given name, replacing
any previous association.
parameters.put(name.trim().toLowerCase(Locale.ENGLISH), value);
|
| public int | size()Return the number of name-value pairs in this list.
return parameters.size();
|
| private static int | skipWhiteSpace(java.lang.String rawdata, int i)return the index of the first non white space character in
rawdata at or after index i.
int length = rawdata.length();
while ((i < length) && Character.isWhitespace(rawdata.charAt(i)))
i++;
return i;
|
| public java.lang.String | toString()Return a string representation of this object.
StringBuffer buffer = new StringBuffer();
buffer.ensureCapacity(parameters.size() * 16);
// heuristic: 8 characters per field
Enumeration keys = parameters.keys();
while (keys.hasMoreElements()) {
String key = (String)keys.nextElement();
buffer.append("; ");
buffer.append(key);
buffer.append('=");
buffer.append(quote((String)parameters.get(key)));
}
return buffer.toString();
|
| private static java.lang.String | unquote(java.lang.String value)A routine that knows how to strip the quotes and
escape sequences from the given value.
int valueLength = value.length();
StringBuffer buffer = new StringBuffer();
buffer.ensureCapacity(valueLength);
boolean escaped = false;
for (int i = 0; i < valueLength; ++i) {
char currentChar = value.charAt(i);
if (!escaped && (currentChar != '\\")) {
buffer.append(currentChar);
} else if (escaped) {
buffer.append(currentChar);
escaped = false;
} else {
escaped = true;
}
}
return buffer.toString();
|
