@Override
public DualInputSemanticProperties getSemanticProperties() {
DualInputSemanticProperties props = super.getSemanticProperties();
// offset semantic information by extracted key fields
if (props != null
&& (this.keys1 instanceof SelectorFunctionKeys
|| this.keys2 instanceof SelectorFunctionKeys)) {
int numFields1 = this.getInput1Type().getTotalFields();
int numFields2 = this.getInput2Type().getTotalFields();
int offset1 =
(this.keys1 instanceof SelectorFunctionKeys)
? ((SelectorFunctionKeys<?, ?>) this.keys1).getKeyType().getTotalFields()
: 0;
int offset2 =
(this.keys2 instanceof SelectorFunctionKeys)
? ((SelectorFunctionKeys<?, ?>) this.keys2).getKeyType().getTotalFields()
: 0;
props =
SemanticPropUtil.addSourceFieldOffsets(props, numFields1, numFields2, offset1, offset2);
}
return props;
}
