/*
* Writes the SOLR query for temporal operator : After, Before, Begins, Ends, TEquals, BegunBy,
* EndedBy, During, TContains
*
* @param filter temporal operator to encode
*/
private Object visitBinaryTemporalOperator(BinaryTemporalOperator filter, Object extraData) {
StringWriter output = asStringWriter(extraData);
Expression e1 = filter.getExpression1();
Expression e2 = filter.getExpression2();
ExpressionToSolr visitor = new ExpressionToSolr(filter);
if (filter instanceof After) {
checkExpressionIsProperty(e1);
checkExpressionIsLiteral(e2);
PropertyName propertyName = (PropertyName) e1;
propertyName.accept(visitor, output);
output.append(":{");
e2.accept(visitor, output);
output.append(" TO *}");
}
if (filter instanceof Before) {
checkExpressionIsProperty(e1);
checkExpressionIsLiteral(e2);
PropertyName propertyName = (PropertyName) e1;
propertyName.accept(visitor, output);
output.append(":{* TO ");
e2.accept(visitor, output);
output.append("}");
}
if (filter instanceof Begins || filter instanceof Ends || filter instanceof TEquals) {
checkExpressionIsProperty(e1);
checkExpressionIsLiteral(e2);
PropertyName propertyName = (PropertyName) e1;
propertyName.accept(visitor, output);
output.append(":");
e2.accept(visitor, output);
}
if (filter instanceof BegunBy || filter instanceof EndedBy) {
checkExpressionIsProperty(e2);
checkExpressionIsLiteral(e1);
PropertyName propertyName = (PropertyName) e2;
propertyName.accept(visitor, output);
output.append(":");
e1.accept(visitor, output);
}
if (filter instanceof During) {
checkExpressionIsProperty(e1);
checkExpressionIsLiteral(e2);
PropertyName propertyName = (PropertyName) e1;
propertyName.accept(visitor, output);
output.append(":{");
e2.accept(visitor, output);
output.append("}");
}
if (filter instanceof TContains) {
checkExpressionIsProperty(e2);
checkExpressionIsLiteral(e1);
PropertyName propertyName = (PropertyName) e2;
propertyName.accept(visitor, output);
output.append(":{");
e1.accept(visitor, output);
output.append("}");
}
return output;
}
private void handleTemporal(BinaryTemporalOperator filter) {
Literal literalWrapper = (Literal) filter.getExpression2();
logger.debug("literalWrapper.getValue() = " + literalWrapper.getValue());
Object literal = literalWrapper.evaluate(null);
if (literal instanceof Period) {
Period period = (Period) literal;
// Extract the start and end dates from the filter
Date start = period.getBeginning().getPosition().getDate();
Date end = period.getEnding().getPosition().getDate();
temporalSearch = new TemporalFilter(start, end);
filters.add(filter);
} else if (literal instanceof PeriodDuration) {
DefaultPeriodDuration duration = (DefaultPeriodDuration) literal;
// Extract the start and end dates from the filter
Date end = Calendar.getInstance().getTime();
Date start = new Date(end.getTime() - duration.getTimeInMillis());
temporalSearch = new TemporalFilter(start, end);
filters.add(filter);
}
}
protected Object visit(BinaryTemporalOperator filter, Object data) {
if (original == null) original = filter;
// supports it as a group -- no need to check the type
if (!fcs.supports(filter)) {
postStack.push(filter);
return null;
}
Expression leftValue = filter.getExpression1();
Expression rightValue = filter.getExpression2();
int i = postStack.size();
if (leftValue == null || rightValue == null) {
postStack.push(filter);
return null;
}
leftValue.accept(this, null);
if (i < postStack.size()) {
postStack.pop();
postStack.push(filter);
return null;
}
rightValue.accept(this, null);
if (i < postStack.size()) {
preStack.pop(); // left
postStack.pop();
postStack.push(filter);
return null;
}
preStack.pop(); // left side
preStack.pop(); // right side
preStack.push(filter);
return null;
}
