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package com.sun.mail.imap.protocol;
import java.io.*;
import java.util.*;
import com.sun.mail.util.*;
import com.sun.mail.iap.*;
/**
* This class represents a FETCH response obtained from the input stream
* of an IMAP server.
*
* @author John Mani
* @author Bill Shannon
*/
public class FetchResponse extends IMAPResponse {
/*
* Regular Items are saved in the items array.
* Extension items (items handled by subclasses
* that extend the IMAP provider) are saved in the
* extensionItems map, indexed by the FETCH item name.
* The map is only created when needed.
*
* XXX - Should consider unifying the handling of
* regular items and extension items.
*/
private Item[] items;
private Map extensionItems;
private final FetchItem[] fitems;
public FetchResponse(Protocol p)
throws IOException, ProtocolException {
super(p);
fitems = null;
parse();
}
public FetchResponse(IMAPResponse r)
throws IOException, ProtocolException {
this(r, null);
}
/**
* Construct a FetchResponse that handles the additional FetchItems.
*
* @param r the IMAPResponse
* @param fitems the fetch items
* @exception IOException for I/O errors
* @exception ProtocolException for protocol failures
* @since JavaMail 1.4.6
*/
public FetchResponse(IMAPResponse r, FetchItem[] fitems)
throws IOException, ProtocolException {
super(r);
this.fitems = fitems;
parse();
}
public int getItemCount() {
return items.length;
}
public Item getItem(int index) {
return items[index];
}
public T getItem(Class c) {
for (int i = 0; i < items.length; i++) {
if (c.isInstance(items[i]))
return c.cast(items[i]);
}
return null;
}
/**
* Return the first fetch response item of the given class
* for the given message number.
*
* @param r the responses
* @param msgno the message number
* @param c the class
* @param the type of fetch item
* @return the fetch item
*/
public static T getItem(Response[] r, int msgno,
Class c) {
if (r == null)
return null;
for (int i = 0; i < r.length; i++) {
if (r[i] == null ||
!(r[i] instanceof FetchResponse) ||
((FetchResponse)r[i]).getNumber() != msgno)
continue;
FetchResponse f = (FetchResponse)r[i];
for (int j = 0; j < f.items.length; j++) {
if (c.isInstance(f.items[j]))
return c.cast(f.items[j]);
}
}
return null;
}
/**
* Return all fetch response items of the given class
* for the given message number.
*
* @param r the responses
* @param msgno the message number
* @param c the class
* @param the type of fetch items
* @return the list of fetch items
* @since JavaMail 1.5.2
*/
public static List getItems(Response[] r, int msgno,
Class c) {
List items = new ArrayList<>();
if (r == null)
return items;
for (int i = 0; i < r.length; i++) {
if (r[i] == null ||
!(r[i] instanceof FetchResponse) ||
((FetchResponse)r[i]).getNumber() != msgno)
continue;
FetchResponse f = (FetchResponse)r[i];
for (int j = 0; j < f.items.length; j++) {
if (c.isInstance(f.items[j]))
items.add(c.cast(f.items[j]));
}
}
return items;
}
/**
* Return a map of the extension items found in this fetch response.
* The map is indexed by extension item name. Callers should not
* modify the map.
*
* @return Map of extension items, or null if none
* @since JavaMail 1.4.6
*/
public Map getExtensionItems() {
return extensionItems;
}
private final static char[] HEADER = {'.','H','E','A','D','E','R'};
private final static char[] TEXT = {'.','T','E','X','T'};
private void parse() throws ParsingException {
if (!isNextNonSpace('('))
throw new ParsingException(
"error in FETCH parsing, missing '(' at index " + index);
List v = new ArrayList<>();
Item i = null;
skipSpaces();
do {
if (index >= size)
throw new ParsingException(
"error in FETCH parsing, ran off end of buffer, size " + size);
i = parseItem();
if (i != null)
v.add(i);
else if (!parseExtensionItem())
throw new ParsingException(
"error in FETCH parsing, unrecognized item at index " +
index + ", starts with \"" + next20() + "\"");
} while (!isNextNonSpace(')'));
items = v.toArray(new Item[v.size()]);
}
/**
* Return the next 20 characters in the buffer, for exception messages.
*/
private String next20() {
if (index + 20 > size)
return ASCIIUtility.toString(buffer, index, size);
else
return ASCIIUtility.toString(buffer, index, index + 20) + "...";
}
/**
* Parse the item at the current position in the buffer,
* skipping over the item if successful. Otherwise, return null
* and leave the buffer position unmodified.
*/
@SuppressWarnings("empty")
private Item parseItem() throws ParsingException {
switch (buffer[index]) {
case 'E': case 'e':
if (match(ENVELOPE.name))
return new ENVELOPE(this);
break;
case 'F': case 'f':
if (match(FLAGS.name))
return new FLAGS((IMAPResponse)this);
break;
case 'I': case 'i':
if (match(INTERNALDATE.name))
return new INTERNALDATE(this);
break;
case 'B': case 'b':
if (match(BODYSTRUCTURE.name))
return new BODYSTRUCTURE(this);
else if (match(BODY.name)) {
if (buffer[index] == '[')
return new BODY(this);
else
return new BODYSTRUCTURE(this);
}
break;
case 'R': case 'r':
if (match(RFC822SIZE.name))
return new RFC822SIZE(this);
else if (match(RFC822DATA.name)) {
boolean isHeader = false;
if (match(HEADER))
isHeader = true; // skip ".HEADER"
else if (match(TEXT))
isHeader = false; // skip ".TEXT"
return new RFC822DATA(this, isHeader);
}
break;
case 'U': case 'u':
if (match(UID.name))
return new UID(this);
break;
case 'M': case 'm':
if (match(MODSEQ.name))
return new MODSEQ(this);
break;
default:
break;
}
return null;
}
/**
* If this item is a known extension item, parse it.
*/
private boolean parseExtensionItem() throws ParsingException {
if (fitems == null)
return false;
for (int i = 0; i < fitems.length; i++) {
if (match(fitems[i].getName())) {
if (extensionItems == null)
extensionItems = new HashMap<>();
extensionItems.put(fitems[i].getName(),
fitems[i].parseItem(this));
return true;
}
}
return false;
}
/**
* Does the current buffer match the given item name?
* itemName is the name of the IMAP item to compare against.
* NOTE that itemName *must* be all uppercase.
* If the match is successful, the buffer pointer (index)
* is incremented past the matched item.
*/
private boolean match(char[] itemName) {
int len = itemName.length;
for (int i = 0, j = index; i < len;)
// IMAP tokens are case-insensitive. We store itemNames in
// uppercase, so convert operand to uppercase before comparing.
if (Character.toUpperCase((char)buffer[j++]) != itemName[i++])
return false;
index += len;
return true;
}
/**
* Does the current buffer match the given item name?
* itemName is the name of the IMAP item to compare against.
* NOTE that itemName *must* be all uppercase.
* If the match is successful, the buffer pointer (index)
* is incremented past the matched item.
*/
private boolean match(String itemName) {
int len = itemName.length();
for (int i = 0, j = index; i < len;)
// IMAP tokens are case-insensitive. We store itemNames in
// uppercase, so convert operand to uppercase before comparing.
if (Character.toUpperCase((char)buffer[j++]) !=
itemName.charAt(i++))
return false;
index += len;
return true;
}
}
