import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
private Value createValue(ValueFacade expression) throws XPathException {
  final TypeHierarchy typeHierarchy = myXPathContext.getConfiguration().getTypeHierarchy();
  final ItemType itemType = expression.getItemType(typeHierarchy);

  final SequenceIterator it = expression.iterate(myXPathContext);
  Item value = null;
  if (it.next() != null) {
    value = it.current();
  }
  if (it.next() == null) {
    return new SingleValue(value, itemType);        
  }
  return new SequenceValue(value, it, itemType);
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
public ItemType getItemType(TypeHierarchy hierarchy) {
  if (myValue instanceof net.sf.saxon.value.Value) {
    return ((net.sf.saxon.value.Value)myValue).getItemType(hierarchy);
  }
  if (myValue instanceof Item) {
    return Type.getItemType((Item)myValue, hierarchy);
  }
  return AnyItemType.getInstance();
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
@Override
public boolean conforms(AtomicType keyType, SequenceType valueType, TypeHierarchy th) {
	if (keyType.getUType() != UType.STRING) {
		return false;
	}
	if (valueType.getPrimaryType().getUType() != UType.ANY_ATOMIC) {
		return false;
	}
	return true;
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
@Override
public ItemType getItemType(TypeHierarchy th) {
	return null;
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
@Override
public MapType getItemType(TypeHierarchy th) {
	return type;
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
public ItemType getItemType(TypeHierarchy th) {
    return EmptySequenceTest.getInstance();
}
 

import net.sf.saxon.type.TypeHierarchy; //导入依赖的package包/类
public ItemType getItemType(TypeHierarchy th) {
    return AnyItemType.getInstance();
}