CertificatePair (jGridstart top-level 1.19)

java.lang.Object
- java.util.Dictionary<K,V>
- - java.util.Hashtable<Object,Object>
  - - java.util.Properties
    - - nl.nikhef.jgridstart.CertificatePair

All Implemented Interfaces:

ItemSelectable, Serializable, Cloneable, Map<Object,Object>
```
public class CertificatePair
extends Properties
implements ItemSelectable
```
Class containing everything related to a grid certificate.
Each instance is directly bound to a ~/.globus/xxx directory containing the relevant files (or another base directory, which is the CertificateStore). This is at least a private key, and usually a certificate. A log can be expected as well (this class logs all actions to it) and a certificate signing request can be present too.
This class provides actions like request, revoke, import, export, etc.
This class is also a child of Properties. One can set and get any property desired, but some are specifically reserved and queried directly from the certificate and/or certificate signing request. Please see getProperty(java.lang.String). When the object is loaded, properties found in the file indicated by getPropertiesFile() are set. On destruction, the properties are written back as to provide transparent presistency. When a property shouldn't be written, one can set the property name with .volatile appended to true to make the property not persistent, e.g. with
```
   foo.html=>b<hi there>/b<
   foo.html.volatile=true
 
```
the variable foo.html is not saved back to the properties file.
After some more thinking this could actually involve a Java KeyStore as a custom backend for ~/.globus containing just a private key and a certificate. Then custom extensions can retrieve the CSR and other info. This would allow one to use other types of 'definitive' storage as well, like using a PKCS#12 certificate instead of userkey.pem and certificate.pem for jGlobus, as mentioned on a mailing-list. For now I'll keep it as it is.
Author:

wvengen

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`protected X509Certificate`	`cert`	The certificate.
`protected File`	`path`	The directory that represents this CertificatePair.
`protected PKCS10CertificationRequest`	`req`	If no certificate exists we can get info from the CSR

Fields inherited from class java.util.Properties
defaults

Constructor Summary

Constructors
Modifier Constructor Description

protected CertificatePair()
Create new empty certificate pair

CertificatePair(File f)
New certificate pair of a directory

Constructors
Modifier	Constructor	Description
`protected`	`CertificatePair()`	Create new empty certificate pair
	`CertificatePair(File f)`	New certificate pair of a directory

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addItemListener(ItemListener l)`
`void`	`check(boolean checkPriv)`	Run certificate checks.
`void`	`clear()`	Reset the contents to this object to the empty state
`void`	`downloadCertificate()`	Download the certificate from the certificate authority
`boolean`	`equals(Object other)`	Test equality.
`void`	`exportTo(File dst)`	Export the certificate and private key to a file using private key password.
`void`	`exportTo(File dst, char[] pw)`	Export the certificate and private key to a file.
`protected void`	`exportToPEM(File dst, char[] pw)`	Export the certificate and private key to a PEM file.
`protected void`	`exportToPKCS(File dst, char[] pw)`	Export the certificate and private key to a PKCS#12 file.
`static CertificatePair`	`generateRequest(File dst, Properties p)`	Generate a new private key+CSR pair, request password.
`static CertificatePair`	`generateRequest(File dst, Properties p, char[] pw)`	Generate a new private key+CSR pair with specified password.
`protected CA`	`getCA()`	Return the correct CA for this CertificatePair.
`File`	`getCertFile()`	return the File containing the certificate, or null if no certificate is loaded.
`X509Certificate`	`getCertificate()`	Return the certificate.
`protected Date`	`getCompareDate()`	returns either the notBefore date of the certificate or the date from the directory (e.g.
`PKCS10CertificationRequest`	`getCSR()`	Return the certificate signing request (CSR).
`File`	`getCSRFile()`	return the File containing the certificate request, or null if no certificate is loaded.
`String`	`getIssuerPrincipalValue(String id)`
`String`	`getIssuerPrincipalValue(DERObjectIdentifier id)`
`File`	`getKeyFile()`	return the File containing the private key, or null if no certificate is loaded
`File`	`getPath()`	get the source of this certificate, if any
`protected String`	`getPrincipalValue(String id, boolean where)`	Get a principal value from the certificate issuer/subject by string.
`protected String`	`getPrincipalValue(DERObjectIdentifier id, boolean where)`	Return a value of a principal of the certificate issuer/subject.
`protected PrivateKey`	`getPrivateKey()`	Return decrypted private key from specified file.
`protected static PrivateKey`	`getPrivateKey(File keyFile)`	Return the decrypted private key.
`protected File`	`getPropertiesFile()`	Return the File containing the additional properties.
`String`	`getProperty(String key)`	Return the value of a property.
`protected String`	`getPropertyHtml(String key)`	Return a property in html format, or null if not defined.
`File[]`	`getRelatedFiles()`	Return list of existing certificate-related files.
`static String[]`	`getRelatedFilesPossible()`	Return list of certificate-related filenames.
`Object[]`	`getSelectedObjects()`
`String`	`getSubjectPrincipalValue(String id)`
`String`	`getSubjectPrincipalValue(DERObjectIdentifier id)`
`static CertificatePair`	`importFrom(File src, File dst)`	Import a CertificatePair from a keystore into a (new) directory.
`static CertificatePair`	`importFrom(File src, File dst, char[] dstpw)`	Import a CertificatePair from a keystore into a (new) directory.
`protected void`	`importFromDirectory(File src, char[] dstpw)`	Import from Globus-type directory.
`protected void`	`importFromPEM(File src, char[] dstpw)`	Import key and certificate from a PEM file.
`protected void`	`importFromPKCS(File src, char[] dstpw)`	Import from PKCS.
`boolean`	`isCertificationRequestProcessed()`	See if the certificate can be downloaded from the certificate authority.
`protected void`	`load(File f)`	Load a certificate from a directory
`protected void`	`notifyChanged()`	notify itemlisteners that the item was changed
`boolean`	`refresh()`	Refresh an item from disk and update its status from online sources.
`void`	`removeItemListener(ItemListener l)`
`Object`	`setProperty(String name, String value)`
`void`	`store()`	Store the properties in the file indicated by `getPropertiesFile()`.
`String`	`toString()`
`void`	`uploadRequest()`	Upload the certificate signing request to its certificate authority

Methods inherited from interface java.util.Map

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from class java.util.Properties
clone, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, forEach, get, getOrDefault, getProperty, hashCode, isEmpty, keys, keySet, list, list, load, load, loadFromXML, merge, propertyNames, put, putAll, putIfAbsent, rehash, remove, remove, replace, replace, replaceAll, save, size, store, store, storeToXML, storeToXML, storeToXML, stringPropertyNames, values

- Field Detail
  - path
```
protected File path
```
    The directory that represents this CertificatePair.
  - cert
```
protected X509Certificate cert
```
    The certificate. It is cached because it contains most important info.
  - req
```
protected PKCS10CertificationRequest req
```
    If no certificate exists we can get info from the CSR
- Constructor Detail
  - CertificatePair
```
protected CertificatePair()
```
    Create new empty certificate pair
  - CertificatePair
```
public CertificatePair(File f)
                throws IOException,
                       CertificateCheck.CertificateCheckException
```
    New certificate pair of a directory
    
    Throws:
    
    IOException
    
    CertificateCheck.CertificateCheckException
- Method Detail
  - getProperty
```
public String getProperty(String key)
```
    Return the value of a property.
    Usually this just returns the value set by setProperty(java.lang.String, java.lang.String), but there are some cases where the value is taken directly from the certificate or certificate signing request.
    
    valid
    
    is true if the certificate is valid, null otherwise
    
    valid.notafter, valid.notbefore
    
    localised validity interval
    
    valid.notafter.remaining
    
    Number of days until certificate expires
    
    valid.notafter.warning
    
    is true when certificate will expires within the warning period, which is set by the property jgridstart.renewal.warndays.
    
    cert, request
    
    is true when certificate respectively CSR are present
    
    subject, issuer
    
    dinstinguished name in certificate or else CSR, in slash-notation. Specific fields can be requested as well, e.g. subject.o for a comma-separated list of subject organisations; see getSubjectPrincipalValue(org.bouncycastle.asn1.DERObjectIdentifier).
    
    cert.serial
    
    certificate serial number, when certificate is present
    
    path
    
    filesystem path of the directory the certificate and pair live in
    
    usage
    
    is true when child keys can be present
    
    usage.any, usage.serverauth, usage.clientauth, usage.codesigning,
    usage.emailprotection, usage.timestamping, usage.ocspsigning are true when they are defined in the extended key usage
    
    modulus, modulus.first20
    
    the public key's modulus, and its first 20 characters
    
    keysize, keyalgname, sigalgname
    
    Cryptographic properties of the certificate: size of the key (in bits), algorithm name of the key (usually "RSA"), signature algorithm name (see Signature Algorithms).
    
    org
    
    the certificate's (or request's) organisation; this is the last last organisation RDN, optionally with one or more organisation-unit RDNs appended (separated by a comma).
    
    state.icon
    
    Icon for certificate state, one of valid, warning, renew or error.
    
    ca_supported
    
    if the this certificate is issued by the CA jGridstart is connected to.
    
    You can postfix each property with .html to get an html representation. If no html representation is present, it just returns the same as the property without .html.
    
    Overrides:
    
    getProperty in class Properties
    
    Parameters:
    
    key - property to get the value of
    
    Returns:
    
    value of the property, or null if not found.
  - getPropertyHtml
```
protected String getPropertyHtml(String key)
```
    Return a property in html format, or null if not defined.
  - setProperty
```
public Object setProperty(String name,
                          String value)
```
    On setting a property, all ItemListeners are notified using notifyChanged() if the value is different from the old one.
    
    Overrides:
    
    setProperty in class Properties
  - clear
```
public void clear()
```
    Reset the contents to this object to the empty state
    
    Specified by:
    
    clear in interface Map<Object,Object>
    
    Overrides:
    
    clear in class Properties
  - load
```
protected void load(File f)
             throws IOException
```
    Load a certificate from a directory
    
    Throws:
    
    IOException
  - store
```
public void store()
           throws FileNotFoundException,
                  IOException
```
    Store the properties in the file indicated by getPropertiesFile().
    This file is written with permissions so that only the user can read it, because it may contain personal information.
    
    Throws:
    
    FileNotFoundException
    
    IOException
  - importFrom
```
public static CertificatePair importFrom(File src,
                                         File dst,
                                         char[] dstpw)
                                  throws IOException,
                                         PasswordCancelledException,
                                         CertificateCheck.CertificateCheckException,
                                         GeneralSecurityException
```
    Import a CertificatePair from a keystore into a (new) directory.
    
    Parameters:
    
    src - File to import from
    
    dst - Directory to import into. On success, this directory could be passed later to create a new CertificatePair which is equal to the one returned by this method.
    
    dstpw - password to use for private key storage, or null to use same password as import password
    
    Returns:
    
    a new CertificatePair representing the newly imported pair.
    
    Throws:
    
    IOException
    
    PasswordCancelledException
    
    CertificateCheck.CertificateCheckException
    
    GeneralSecurityException
  - importFrom
```
public static CertificatePair importFrom(File src,
                                         File dst)
                                  throws IOException,
                                         PasswordCancelledException,
                                         CertificateCheck.CertificateCheckException,
                                         GeneralSecurityException
```
    Import a CertificatePair from a keystore into a (new) directory.
    
    Parameters:
    
    src - File to import from
    
    dst - Directory to import into. On success, this directory could be passed later to create a new CertificatePair which is equal to the one returned by this method.
    
    Returns:
    
    a new CertificatePair representing the newly imported pair.
    
    Throws:
    
    IOException
    
    PasswordCancelledException
    
    CertificateCheck.CertificateCheckException
    
    GeneralSecurityException
  - importFromPEM
```
protected void importFromPEM(File src,
                             char[] dstpw)
                      throws IOException,
                             GeneralSecurityException,
                             PasswordCancelledException,
                             CertificateCheck.CertificateCheckException
```
    Import key and certificate from a PEM file.
    This may possibly overwrite the current data.
    
    Parameters:
    
    src - PEM file to import from
    
    Throws:
    
    IOException
    
    GeneralSecurityException
    
    PasswordCancelledException
    
    CertificateCheck.CertificateCheckException
  - importFromPKCS
```
protected void importFromPKCS(File src,
                              char[] dstpw)
                       throws IOException,
                              PasswordCancelledException,
                              GeneralSecurityException,
                              CertificateCheck.CertificateCheckException
```
    Import from PKCS.
    If multiple key/certificate entries are found, only the first one is imported.
    
    Parameters:
    
    src - file to import from
    
    dstpw - password for new private keym or null to use same as import password
    
    Throws:
    
    IOException
    
    PasswordCancelledException
    
    GeneralSecurityException
    
    CertificateCheck.CertificateCheckException
  - importFromDirectory
```
protected void importFromDirectory(File src,
                                   char[] dstpw)
                            throws IOException,
                                   CertificateCheck.CertificateCheckException,
                                   NoSuchAlgorithmException
```
    Import from Globus-type directory.
    
    Parameters:
    
    src - directory to import from
    
    dstpw - password for new private key or null to use same as import password
    
    Throws:
    
    IOException
    
    CertificateCheck.CertificateCheckException
    
    NoSuchAlgorithmException
  - exportTo
```
public void exportTo(File dst,
                     char[] pw)
              throws IOException,
                     GeneralSecurityException,
                     CertificateCheck.CertificateCheckException
```
    Export the certificate and private key to a file.
    Type is detected from the filename.
    
    Parameters:
    
    dst - destination to export TooManyListenersException
    
    pw - password to encrypt exported key with, or null to use private key password
    
    Throws:
    
    IOException
    
    GeneralSecurityException
    
    CertificateCheck.CertificateCheckException
  - exportTo
```
public void exportTo(File dst)
              throws PasswordCancelledException,
                     IOException,
                     GeneralSecurityException,
                     CertificateCheck.CertificateCheckException
```
    Export the certificate and private key to a file using private key password.
    Type is detected from the filename, password is taken from private key when required.
    
    Parameters:
    
    dst - destination to export TooManyListenersException
    
    Throws:
    
    PasswordCancelledException
    
    IOException
    
    GeneralSecurityException
    
    CertificateCheck.CertificateCheckException
  - exportToPKCS
```
protected void exportToPKCS(File dst,
                            char[] pw)
                     throws IOException,
                            GeneralSecurityException,
                            PasswordCancelledException,
                            CertificateCheck.CertificateCheckException
```
    Export the certificate and private key to a PKCS#12 file.
    
    Throws:
    
    IOException
    
    GeneralSecurityException
    
    PasswordCancelledException
    
    CertificateCheck.CertificateCheckException
  - exportToPEM
```
protected void exportToPEM(File dst,
                           char[] pw)
                    throws IOException,
                           CertificateCheck.CertificateCheckException
```
    Export the certificate and private key to a PEM file.
    This is quite simple, since it just concatenates the existing files from its .globus directory; no password is needed.
    
    Throws:
    
    IOException
    
    CertificateCheck.CertificateCheckException
  - generateRequest
```
public static CertificatePair generateRequest(File dst,
                                              Properties p,
                                              char[] pw)
                                       throws IOException,
                                              GeneralSecurityException,
                                              PasswordCancelledException,
                                              CAException
```
    Generate a new private key+CSR pair with specified password.
    Details are taken from properties as follows, based on "Grid Certificate Profile" revision 0.26, http://www.ogf.org/documents/GFD.125.pdf.
    Details of the certificate are specified by the supplied Properties. Currently only the property subject is used, which dictates the subject (DN) to use, as well as the optional property keysize, to override the keysize to use. If the keysize is not specified, the system property jgridstart.keysize is used. The same holds for the optional properties sigalgname and keyalgname.
    
    Parameters:
    
    dst - Destination directory (subdir of a store)
    
    p - Properties according to which to generate request
    
    pw - Password to use, or null to ask from user via PasswordCache
    
    Returns:
    
    newly created CertificatePair
    
    Throws:
    
    IOException
    
    GeneralSecurityException
    
    PasswordCancelledException
    
    CAException
  - generateRequest
```
public static CertificatePair generateRequest(File dst,
                                              Properties p)
                                       throws GeneralSecurityException,
                                              IOException,
                                              PasswordCancelledException,
                                              CAException
```
    Generate a new private key+CSR pair, request password.
    
    Throws:
    
    GeneralSecurityException
    
    IOException
    
    PasswordCancelledException
    
    CAException
    
    See Also:
    
    generateRequest(File, Properties)
  - uploadRequest
```
public void uploadRequest()
                   throws GeneralSecurityException,
                          IOException,
                          CAException
```
    Upload the certificate signing request to its certificate authority
    
    Throws:
    
    GeneralSecurityException
    
    IOException
    
    CAException
  - isCertificationRequestProcessed
```
public boolean isCertificationRequestProcessed()
                                        throws GeneralSecurityException,
                                               CAException
```
    See if the certificate can be downloaded from the certificate authority.
    Also sets the property request.processed accordingly.
    
    Throws:
    
    GeneralSecurityException
    
    CAException
  - downloadCertificate
```
public void downloadCertificate()
                         throws IOException,
                                CertificateCheck.CertificateCheckException,
                                CAException,
                                GeneralSecurityException
```
    Download the certificate from the certificate authority
    
    Throws:
    
    IOException
    
    CertificateCheck.CertificateCheckException
    
    CAException
    
    GeneralSecurityException
  - getCA
```
protected CA getCA()
            throws GeneralSecurityException,
                   CAException
```
    Return the correct CA for this CertificatePair. Currently this is fixed, but eventually it should be possible to have certificates with different CA's.
    
    Throws:
    
    GeneralSecurityException
    
    CAException
  - getPath
```
public File getPath()
```
    get the source of this certificate, if any
  - getKeyFile
```
public File getKeyFile()
```
    return the File containing the private key, or null if no certificate is loaded
  - getCSRFile
```
public File getCSRFile()
```
    return the File containing the certificate request, or null if no certificate is loaded. The file need not exist.
  - getCertFile
```
public File getCertFile()
```
    return the File containing the certificate, or null if no certificate is loaded. The file need not exist.
  - getPropertiesFile
```
protected File getPropertiesFile()
```
    Return the File containing the additional properties.
    If no certificate is loaded, null is returned. The file need not exist yet.
  - getPrivateKey
```
protected PrivateKey getPrivateKey()
                            throws IOException,
                                   PasswordCancelledException
```
    Return decrypted private key from specified file.
    The decryption password is requested from the user when required using PasswordCache. When the password is incorrect, the user is asked the password up to three times, after which a exception is thrown.
    
    Throws:
    
    IOException
    
    PasswordCancelledException
  - getPrivateKey
```
protected static PrivateKey getPrivateKey(File keyFile)
                                   throws IOException,
                                          PasswordCancelledException
```
    Return the decrypted private key.
    The decryption password is requested from the user when required using PasswordCache. When the password is incorrect, the user is asked the password up to three times, after which a exception is thrown.
    
    Throws:
    
    IOException
    
    PasswordCancelledException
  - getCertificate
```
public X509Certificate getCertificate()
                               throws IOException
```
    Return the certificate.
    Returns or null if not present.
    
    Throws:
    
    IOException
  - getCSR
```
public PKCS10CertificationRequest getCSR()
                                  throws IOException
```
    Return the certificate signing request (CSR).
    Returns null if not present
    
    Throws:
    
    IOException
  - getRelatedFilesPossible
```
public static String[] getRelatedFilesPossible()
```
    Return list of certificate-related filenames.
    Often a user stores additional files in the ~/.globus directory. This method returns the filenames of files that belong to this certificate and should be kept together.
  - getRelatedFiles
```
public File[] getRelatedFiles()
```
    Return list of existing certificate-related files.
    Returns all files related to this certificate in this directory.
  - refresh
```
public boolean refresh()
                throws GeneralSecurityException,
                       CAException
```
    Refresh an item from disk and update its status from online sources.
    
    Returns:
    
    whether the refresh was successful or no
    
    Throws:
    
    GeneralSecurityException
    
    CAException
  - check
```
public void check(boolean checkPriv)
           throws CertificateCheck.CertificateCheckException
```
    Run certificate checks.
    
    Parameters:
    
    checkPriv - True to check private key as well, requires private key password. You can safely test this if the private key password is still known to be in the PasswordCache
    
    Throws:
    
    CertificateCheck.CertificateCheckException
  - getPrincipalValue
```
protected String getPrincipalValue(DERObjectIdentifier id,
                                   boolean where)
```
    Return a value of a principal of the certificate issuer/subject.
    This is taken from the certificate when present. If that fails, the CSR is attempted. If that fails as well, null is returned. The value returned is meant for display purposes.
    TODO document behaviour when id==null
    
    Parameters:
    
    id - one of X509Certificate.* (O, CN, ...)
    
    where - true for subject, false for issuer
    
    Returns:
    
    string with value of requested principal, or null if not available. If multiple entries are present, these are concatenated using ', '.
  - getSubjectPrincipalValue
```
public String getSubjectPrincipalValue(DERObjectIdentifier id)
```
  - getIssuerPrincipalValue
```
public String getIssuerPrincipalValue(DERObjectIdentifier id)
```
  - getPrincipalValue
```
protected String getPrincipalValue(String id,
                                   boolean where)
```
    Get a principal value from the certificate issuer/subject by string.
    The string is matched with X509Name.DefaultLookUp, see getSubjectPrincipalValue(org.bouncycastle.asn1.DERObjectIdentifier) for details.
    Apart from this some special string ids are provided:
    
    x-email
    
    email address, one of the several fields
    
    x-dn-slash or x-dn
    
    string of the whole subject or issuer distinguished name, parts separated by '/'
    
    x-dn-comma
    
    string of the whole subject or issuer distinguished name, parts separated by ','
    
    x-hash
    
    openssl hash of subject dn, see CryptoUtils.getSubjectHash(java.security.cert.X509Certificate)
    
    Parameters:
    
    id - name as present in X509Name.DefaultLookup
    
    where - true for subject, false for issuer
  - getSubjectPrincipalValue
```
public String getSubjectPrincipalValue(String id)
```
  - getIssuerPrincipalValue
```
public String getIssuerPrincipalValue(String id)
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Properties
  - equals
```
public boolean equals(Object other)
```
    Test equality.
    A CertificatePair object only equals another object if it is a CertificatePair as well, and if the certificates are equal. If no certificate is present, the CSR is compared instead. If no CSR is present either, the path is compared.
    Ideally the private key would be checked as well, but that requires a password.
    
    Specified by:
    
    equals in interface Map<Object,Object>
    
    Overrides:
    
    equals in class Properties
  - getCompareDate
```
protected Date getCompareDate()
```
    returns either the notBefore date of the certificate or the date from the directory (e.g. for a new request).
  - addItemListener
```
public void addItemListener(ItemListener l)
```
    Specified by:
    
    addItemListener in interface ItemSelectable
    
    See Also:
    
    ItemSelectable.addItemListener(java.awt.event.ItemListener)
  - getSelectedObjects
```
public Object[] getSelectedObjects()
```
    Specified by:
    
    getSelectedObjects in interface ItemSelectable
    
    See Also:
    
    ItemSelectable.getSelectedObjects()
  - removeItemListener
```
public void removeItemListener(ItemListener l)
```
    Specified by:
    
    removeItemListener in interface ItemSelectable
    
    See Also:
    
    ItemSelectable.removeItemListener(java.awt.event.ItemListener)
  - notifyChanged
```
protected void notifyChanged()
```
    notify itemlisteners that the item was changed

Class CertificatePair

Field Summary

Fields inherited from class java.util.Properties

Constructor Summary

Method Summary

Methods inherited from interface java.util.Map

Methods inherited from class java.lang.Object

Methods inherited from class java.util.Properties

Field Detail

path

cert

req

Constructor Detail

CertificatePair

CertificatePair

Method Detail

getProperty

getPropertyHtml

setProperty

clear

load

store

importFrom

importFrom

importFromPEM

importFromPKCS

importFromDirectory

exportTo

exportTo

exportToPKCS

exportToPEM

generateRequest

generateRequest

uploadRequest

isCertificationRequestProcessed

downloadCertificate

getCA

getPath

getKeyFile

getCSRFile

getCertFile

getPropertiesFile

getPrivateKey

getPrivateKey

getCertificate

getCSR

getRelatedFilesPossible

getRelatedFiles

refresh

check

getPrincipalValue

getSubjectPrincipalValue

getIssuerPrincipalValue

getPrincipalValue

getSubjectPrincipalValue

getIssuerPrincipalValue

toString

equals

getCompareDate

addItemListener

getSelectedObjects

removeItemListener

notifyChanged