import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(final EmptySet node) {
	if (filter.getParentNode() != null) {
		// Remove filter from its original location
		filter.replaceWith(filter.getArg());
	}
}
 

import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(final EmptySet n) {
    final QueryModelNode p = n.getParentNode();
    if (p.getParentNode() != null && !(p.getParentNode() instanceof QueryRoot)) {
        throw new IllegalArgumentException(
                "Cannot translate EmptySet inside the body of a query / update operation");
    }
    emit("CONSTRUCT {} WHERE {}");
}
 

import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(EmptySet node) throws RuntimeException {
	setSeen(node);
	super.meet(node);
}
 

import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(EmptySet node) throws RuntimeException {
	check(node);
	super.meet(node);
}
 

import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(EmptySet arg0) throws Exception {
	arg0.visitChildren(this);
}
 

import org.openrdf.query.algebra.EmptySet; //导入依赖的package包/类
@Override
public void meet(EmptySet arg0) throws SparqlParserException
{
   // NO-OP
}