Reddy Reddy - 7 months ago 21
Java Question

Parsing Xml with SAX Parser

I am trying to parse an xml file with SAX Parser.
I need to get attributes and it's values of a start element

<?xml version="1.0" encoding="ISO-8859-1" ?>
<API type="Connection">
<INFO server="com.com" function="getAccount2" />
<RESULT code="0">Operation Succeeded</RESULT>
<RESPONSE numaccounts="1">
<ACCOUNT login="fa051981" skynum="111111" maxaliases="1" creationdate="Fri Nov 16 00:59:59 2001" password="pass" type="2222" status="open" mnemonic="32051981" ratelimit="0">
<CHECKATTR />
<REPLYATTR>Service-Type = Frames-User, Framed-Protocol = PPP, Framed-Routing = None</REPLYATTR>
<SETTINGS bitval="4" status="open" />
<SETTINGS bitval="8192" status="open" session_timeout="10800" />
<SETTINGS bitval="32768" status="open" cisco_address_pool="thepool" />
<ALIASES numaliases="0" />
</ACCOUNT>
</RESPONSE>
</API>


IN this xml, I need to get Settings tag/start element attributes along with it's values.

These attributes are dynamic, so I am trying to make a map of them. I am new to SAX Parser.

So far my java code:

public void startElement(String s, String s1, String elementName, Attributes attributes) throws SAXException {

if (elementName.equalsIgnoreCase(GenericConstants.INFO)) {
this.searchRaidusBean.setServer(attributes.getValue(GenericConstants.SERVER));
this.searchRaidusBean.setFunction(attributes.getValue(GenericConstants.FUNCTION));
}
if (elementName.equalsIgnoreCase(GenericConstants.RESULT)) {
this.searchRaidusBean.setResultCode(attributes.getValue(GenericConstants.CODE));
}

if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setLoginId(attributes.getValue(GenericConstants.LOGIN));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setSkyNum(attributes.getValue(GenericConstants.SKYNUM));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setMaxAliases(attributes.getValue(GenericConstants.MAXALIASES));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setCreationDate(attributes.getValue(GenericConstants.CREATION_DATE));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setType(attributes.getValue(GenericConstants.TYPE));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setStatus(attributes.getValue(GenericConstants.STATUS));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setMnemonic(attributes.getValue(GenericConstants.MNEMONIC));
}
if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
this.searchRaidusBean.setRateLimit(attributes.getValue(GenericConstants.RATELIMIT));
}
if (elementName.equalsIgnoreCase(GenericConstants.SETTINGS)) {
//this.searchRaidusBean.getBitval().add(attributes.getValue(GenericConstants.BITVAL));
System.out.println(attributes);
//stuck here
}
if (elementName.equalsIgnoreCase(GenericConstants.ALIASES)) {
this.tempKey = attributes.getValue(GenericConstants.MNEMONIC);
}
}



public void endElement(String str1, String str2, String element) throws SAXException {
if (element.equalsIgnoreCase(GenericConstants.RESULT)) {
this.searchRaidusBean.setResultMessage(this.tempValue);
}
if (element.equalsIgnoreCase(GenericConstants.ALIASES)) {
if (!StringUtils.isBlank(this.tempKey)) {
this.searchRaidusBean.getAlias().put(this.tempKey, this.tempValue);
}
}
}


public void characters(char[] charArray, int i, int j) throws SAXException {
this.tempValue = new String(charArray, i, j);
}

Answer

If you are using the DefaultHandler, then you will be receiving a startElement event.

This method carries the Attributes as one of it's parameters.

You will need to use getIndex(String) to get the index of the named attribute and getValue(int) to get the value of said attribute.

As Nambari has pointed out, there are hundreds of tutorials on the internet and more then a few posts on the subject on SO (I answered one over the weekend).

UPDATED

I'd suggest it should look something like this (I've not tested it)

public void startElement(String uri, String localName, String elementName, Attributes attributes) throws SAXException {

    if (elementName.equalsIgnoreCase(GenericConstants.INFO)) {
        this.searchRaidusBean.setServer(attributes.getValue(GenericConstants.SERVER));
        this.searchRaidusBean.setFunction(attributes.getValue(GenericConstants.FUNCTION));
    }
    if (elementName.equalsIgnoreCase(GenericConstants.RESULT)) {
        this.searchRaidusBean.setResultCode(attributes.getValue(GenericConstants.CODE));
    }

    if (elementName.equalsIgnoreCase(GenericConstants.ACCOUNT)) {
        this.searchRaidusBean.setLoginId(attributes.getValue(GenericConstants.LOGIN));
        this.searchRaidusBean.setSkyNum(attributes.getValue(GenericConstants.SKYNUM));
        this.searchRaidusBean.setMaxAliases(attributes.getValue(GenericConstants.MAXALIASES));
        this.searchRaidusBean.setCreationDate(attributes.getValue(GenericConstants.CREATION_DATE));
        this.searchRaidusBean.setType(attributes.getValue(GenericConstants.TYPE));
        this.searchRaidusBean.setStatus(attributes.getValue(GenericConstants.STATUS));
        this.searchRaidusBean.setMnemonic(attributes.getValue(GenericConstants.MNEMONIC));
        this.searchRaidusBean.setRateLimit(attributes.getValue(GenericConstants.RATELIMIT));
    }

    if (elementName.equalsIgnoreCase(GenericConstants.SETTINGS)) {

        for (int index = 0; index < attributes.getLength(); index++) {

            String attName = attributes.getLocalName(index);
            String value = attributes.getValue(index);

            map.put(attName, value);

        }

    }

    if (elementName.equalsIgnoreCase(GenericConstants.ALIASES)) {
        this.tempKey = attributes.getValue(GenericConstants.MNEMONIC);
    }

}

UPDATED with tested example

I took you data (from the OP) and run it through the following handler

DefaultHandler handler = new DefaultHandler() {
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

        if (qName.equalsIgnoreCase("settings")) {

            System.out.println("Parse settings attributes...");

            for (int index = 0; index < attributes.getLength(); index++) {

                String aln = attributes.getLocalName(index);
                String value = attributes.getValue(index);

                System.out.println("    " + aln + " = " + value);


            }

        }

    }
};

And I got the following output

Parse settings attributes...
    bitval = 4
    status = open
Parse settings attributes...
    bitval = 8192
    status = open
    session_timeout = 10800
Parse settings attributes...
    bitval = 32768
    status = open
    cisco_address_pool = thepool

So I don't know what you're doing.