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Small library for Excel generation based on XLS templates

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//package org.jxls.builder.xml;
//
//import ch.qos.logback.core.joran.action.Action;
//import ch.qos.logback.core.joran.spi.ActionException;
//import ch.qos.logback.core.joran.spi.InterpretationContext;
//import org.jxls.area.Area;
//import org.jxls.command.Command;
//import org.jxls.command.GridCommand;
//import org.jxls.common.AreaRef;
//import org.xml.sax.Attributes;
//
///**
// * Builds {@link GridCommand} from XML
// *
// * @author Leonid Vysochyn
// */
//public class GridAction extends Action {
//    private static final String HEADER_ATTR = "headers";
//    private static final String DATA_ATTR = "data";
//    private static final String REF_ATTR = "ref";
//
//    @Override
//    public void begin(InterpretationContext ic, String s, Attributes attributes) throws ActionException {
//        String headers = attributes.getValue(HEADER_ATTR);
//        String data = attributes.getValue(DATA_ATTR);
//        String ref = attributes.getValue(REF_ATTR);
//        if (headers == null || headers.length() == 0) {
//            String errMsg = "'headers' attribute of 'grid' tag is empty";
//            ic.addError(errMsg);
//            throw new IllegalArgumentException(errMsg);
//        }
//        if (ref == null || ref.length() == 0) {
//            String errMsg = "'ref' attribute of 'grid' tag is empty";
//            ic.addError(errMsg);
//        }
//        Command command = new GridCommand(headers, data);
//        Object object = ic.peekObject();
//        if (object instanceof Area) {
//            Area area = (Area) object;
//            area.addCommand(new AreaRef(ref), command);
//        } else {
//            String errMsg = "Object [" + object + "] currently at the top of the stack is not an Area";
//            ic.addError(errMsg);
//            throw new IllegalArgumentException(errMsg);
//        }
//        ic.pushObject(command);
//    }
//
//    @Override
//    public void end(InterpretationContext ic, String s) throws ActionException {
//        ic.popObject();
//    }
//}