Java

Find XML Element where Attribute = Value

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Finds an XML element at a particular location where an attribute has a specified value. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // We have the following XML and wish to find the value of the time attribute where msg = "alert-from".

    // <cdr id="4e5d3e7f41bf6201ad81000c29703270" e164="6207">
    //     <user>
    //         <grp name="wfln" mode="active"/>
    //     </user>
    //     <event msg="setup-to" time="287069" e164="5034"/>
    //     <event msg="alert-from" time="287069" e164="5034"/>
    //     <event msg="rel-to" time="287079" e164="5034"/>
    // </cdr>

    // First, build the above XML:

    CkXml xml = new CkXml();
    xml.put_Tag("cdr");
    xml.AddAttribute("id","4e5d3e7f41bf6201ad81000c29703270");
    xml.AddAttribute("e164","6207");
    xml.UpdateAttrAt("user|grp",true,"name","wfln");
    xml.UpdateAttrAt("user|grp",true,"mode","active");
    xml.UpdateAttrAt("event",true,"msg","setup-to");
    xml.UpdateAttrAt("event",true,"time","287069");
    xml.UpdateAttrAt("event",true,"e164","5034");
    xml.UpdateAttrAt("event[1]",true,"msg","alert-from");
    xml.UpdateAttrAt("event[1]",true,"time","287069");
    xml.UpdateAttrAt("event[1]",true,"e164","5034");
    xml.UpdateAttrAt("event[2]",true,"msg","rel-to");
    xml.UpdateAttrAt("event[2]",true,"time","287079");
    xml.UpdateAttrAt("event[2]",true,"e164","5034");

    // Show that we have the above XML
    System.out.println(xml.getXml());

    // Find the element where msg = "alert-from"
    // This updates the xml object's reference to the found element (if successful).
    String notUsed = xml.chilkatPath("/A/event,msg,alert-from|$");
    if (xml.get_LastMethodSuccess() == false) {
        System.out.println("Not found.");
        return;
        }

    // Get the value of the "time" attribute.
    System.out.println("time = " + xml.getAttrValue("time"));

    // Restore the xml object's internal reference to the root of the XML document
    xml.GetRoot2();
  }
}