sdbDeleteAttributes.java

package org.xmlsh.aws;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.stream.XMLStreamException;

import net.sf.saxon.s9api.SaxonApiException;

import org.xmlsh.aws.util.AWSSDBCommand;
import org.xmlsh.core.CoreException;
import org.xmlsh.core.Options;
import org.xmlsh.core.OutputPort;
import org.xmlsh.core.UnexpectedException;
import org.xmlsh.core.XValue;
import org.xmlsh.util.Util;

import com.amazonaws.services.simpledb.model.Attribute;
import com.amazonaws.services.simpledb.model.DeleteAttributesRequest;
import com.amazonaws.services.simpledb.model.UpdateCondition;


public class sdbDeleteAttributes	 extends  AWSSDBCommand {



    /**
     * @param args
     * @throws IOException 
     */
    @Override
    public int run(List<XValue> args) throws Exception {

        Options opts = getOptions("update:,exists:,q=quiet");
        parseOptions(opts, args);

        args = opts.getRemainingArgs();        
        setSerializeOpts(this.getSerializeOpts(opts));


        String updateName = opts.getOptString("update", null);
        String updateExists = opts.getOptString("exists",null);


        try {
            getSDBClient(opts);
        } catch (UnexpectedException e) {
            usage( e.getLocalizedMessage() );
            return 1;

        }

        if( args.size() < 2){
            usage(getName()+ ":" + "domain item attributes ...");

        }
        String domain = args.remove(0).toString();
        String item   = args.remove(0).toString();


        int ret = -1;
        ret = delete(domain,item,args,updateName,updateExists, opts.hasOpt("q"));



        return ret;


    }


    private int delete(String domain, String item, List<XValue > args, String updateName, String updateExists, boolean bQuiet) throws IOException, XMLStreamException, SaxonApiException, CoreException 
    {



        UpdateCondition cond = null  ;
        if( ! Util.isEmpty(updateName))
            cond =  new UpdateCondition( updateName , updateExists , ! Util.isEmpty(updateExists)) ;




        List<Attribute> attributes = getAttributes( args );

        DeleteAttributesRequest request = new DeleteAttributesRequest(domain,item).withAttributes(attributes).withExpected(cond);

        traceCall("deleteAttributes");

        mAmazon.deleteAttributes(request);

        if( ! bQuiet ){
            OutputPort stdout = getStdout();
            mWriter = stdout.asXMLStreamWriter(getSerializeOpts());

            emptyDocument();

            closeWriter();
            stdout.writeSequenceTerminator(getSerializeOpts());
            stdout.release();

        }






        return 0;


    }


    private List<Attribute> getAttributes(List<XValue> args) 
    {
        List<Attribute> attrs = new ArrayList<Attribute>(args.size());
        while( !args.isEmpty()){

            String name = args.remove(0).toString();
            attrs.add( new Attribute(name,null) );



        }
        return attrs ;
    }



    @Override
    public void usage() {
        super.usage();
    }





}