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String fstr = flinegetFilter(); srchfilter += fstr; } srchfilter += ")"; if ( srchfilterlength() == 3 ) { // No filters found return; } // Now do the search res = ldsearch( base, scope, srchfilter, ATTRS, false ); // Display search filter String outres = "Filter=" + srchfilter + "\n" + " \n"; // Loop on results building each line while ( reshasMoreElements() ) { try { // Next directory entry LDAPEntry entry = resnext(); outres += format( entry ); status = 0; } catch ( LDAPReferralException e ) { // Ignore referrals continue; } catch (LDAPException le) { int rc = legetLDAPResultCode(); if ( rc == leSIZE_LIMIT_EXCEEDED ) { appendmsg = "\nExceeded size limit"; } else if ( rc == leTIME_LIMIT_EXCEEDED ) { appendmsg = "\nExceeded time limit"; } else { appendmsg = letoString(); } } }
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outres += appendmsg; outputsetText( outres ); // Display in text area } catch( Exception e ) { Systemoutprintln( "Search error: " + etoString() ); } }
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The connectServer method is called whenever we need to establish a connection to the LDAP server:
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protected void connectServer() { // Connect to the LDAP server if ( (ld == null) || (!ldisConnected()) ) { try { ld = new LDAPConnection(); ldconnect( host, port, authdn, authpw ); } catch( LDAPException e ) { Systemoutprintln( "Connect error: " + etoString() ); Systemexit( 1 ); } } }
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We are binding with the speci ed command-line credential information If none is supplied, we simply bind anonymously The following two methods return a display string for the text box They handle situations in which no value exists by substituting a dash for the value The format method returns a String with each matching entry in tab-delimited format The returned String is directly appended to the text box by the calling method
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/** * Format a string with attribute values from an entry, * separated by tabs * * @param entry LDAP entry containing cn, telephoneNumber, * and mail */ public String format( LDAPEntry entry ) { String outstr = ""; // Get the data - hard-coded attribute names here! String name = getValue( entry, "cn" );
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String phone = getValue( entry, "telephoneNumber" ); String email = getValue( entry, "mail" ); // Limit the full name to 15 characters if ( namelength() > 15 ) { name = namesubstring( 0, 15 ); } outstr = name + "\t" + phone + "\t" + email + "\n"; return outstr; } /** * Get first string value of an attribute from an entry * or - if not present * * @param entry LDAP entry containing the attribute * @param attrName name of attribute to retrieve * @return first value of attribute or - */ protected String getValue( LDAPEntry entry, String attrName ) { LDAPAttribute attr = entrygetAttribute( attrName ); if ( attr == null ) { return "-"; } Enumeration enumVals = attrgetStringValues(); // Enumerate on values for this attribute boolean hasVals = false; if ( (enumVals == null) || !enumValshasMoreElements() ) { return "-"; } return (String)enumValsnextElement(); } private private private private private private private LDAPConnection ld = null; String host; int port; String conf; String base; String authdn; String authpw;
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private int scope = LDAPConnectionSCOPE_SUB; private TextArea output; private TextField srch; private Button searchb; // Attributes to display for each entry found private static final String[] ATTRS = {"cn","mail","telephoneNumber"}; // Filter configuration file object private LDAPFilterDescriptor filterDesc = null; }
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This program is useful as an example of working with the results from a search and presenting them in a graphical environment When the program is rst started, a Connect button is displayed Clicking this button will open a connection to the LDAP server and rename the button as Search After a search string is entered, clicking the Search button will cause the search string to be parsed using a lter con guration le, and then the search will be submitted to the server Search lter con gurations provide other functionality as well, such as lter pre xing and suf xing Check the reference section of this book for details on these features It should be evident that this functionality can make your code more dynamic in response to user input To execute the program, use the following command-line option:
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java FilterSearchDialog localhost 389 filterconf "o=airiuscom"
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This command will present a search screen, where you may issue searches against the directory Issuing a search of 555 against the sample data le included on the CD-ROM that accompanies this book will result in the display shown in Figure 5-5
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