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package javax.mail.search;
import javax.mail.*;
/**
* This class implements comparisons for Message Flags.
*
* @author Bill Shannon
* @author John Mani
*/
public final class FlagTerm extends SearchTerm {
/**
* Indicates whether to test for the presence or
* absence of the specified Flag. If true,
* then test whether all the specified flags are present, else
* test whether all the specified flags are absent.
*
* @serial
*/
private boolean set;
/**
* Flags object containing the flags to test.
*
* @serial
*/
private Flags flags;
private static final long serialVersionUID = -142991500302030647L;
/**
* Constructor.
*
* @param flags Flags object containing the flags to check for
* @param set the flag setting to check for
*/
public FlagTerm(Flags flags, boolean set) {
this.flags = flags;
this.set = set;
}
/**
* Return the Flags to test.
*
* @return the flags
*/
public Flags getFlags() {
return (Flags)flags.clone();
}
/**
* Return true if testing whether the flags are set.
*
* @return true if testing whether the flags are set
*/
public boolean getTestSet() {
return set;
}
/**
* The comparison method.
*
* @param msg The flag comparison is applied to this Message
* @return true if the comparson succeeds, otherwise false.
*/
@Override
public boolean match(Message msg) {
try {
Flags f = msg.getFlags();
if (set) { // This is easy
if (f.contains(flags))
return true;
else
return false;
}
// Return true if ALL flags in the passed in Flags
// object are NOT set in this Message.
// Got to do this the hard way ...
Flags.Flag[] sf = flags.getSystemFlags();
// Check each flag in the passed in Flags object
for (int i = 0; i < sf.length; i++) {
if (f.contains(sf[i]))
// this flag IS set in this Message, get out.
return false;
}
String[] s = flags.getUserFlags();
// Check each flag in the passed in Flags object
for (int i = 0; i < s.length; i++) {
if (f.contains(s[i]))
// this flag IS set in this Message, get out.
return false;
}
return true;
} catch (MessagingException e) {
return false;
} catch (RuntimeException e) {
return false;
}
}
/**
* Equality comparison.
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof FlagTerm))
return false;
FlagTerm ft = (FlagTerm)obj;
return ft.set == this.set && ft.flags.equals(this.flags);
}
/**
* Compute a hashCode for this object.
*/
@Override
public int hashCode() {
return set ? flags.hashCode() : ~flags.hashCode();
}
}