}
@Override
public void evaluate(String currentPath, PathRef parent, Object model, EvaluationContextImpl ctx) {
if(model == null){
throw new PathNotFoundException("The path " + currentPath + " is null");
}
if (!ctx.jsonProvider().isArray(model)) {
throw new InvalidPathException(format("Filter: %s can only be applied to arrays. Current context is: %s", toString(), model));
}
try {
int idx;
int input;
int length;
int from;
int to;
switch (operation){
case SINGLE_INDEX:
handleArrayIndex(criteria.get(0), currentPath, model, ctx);
break;
case INDEX_SEQUENCE:
for (Integer i : criteria) {
handleArrayIndex(i, currentPath, model, ctx);
}
break;
case CONTEXT_SIZE:
length = ctx.jsonProvider().length(model);
idx = length + criteria.get(0);
handleArrayIndex(idx, currentPath, model, ctx);
break;
case SLICE_FROM: //[2:]
input = criteria.get(0);
length = ctx.jsonProvider().length(model);
from = input;
if (from < 0) {
//calculate slice start from array length
from = length + from;
}
from = Math.max(0, from);
logger.debug("Slice from index on array with length: {}. From index: {} to: {}. Input: {}", length, from, length - 1, toString());
if (length == 0 || from >= length) {
return;
}
for (int i = from; i < length; i++) {
handleArrayIndex(i, currentPath, model, ctx);
}
break;
case SLICE_TO : //[:2]
input = criteria.get(0);
length = ctx.jsonProvider().length(model);
to = input;
if (to < 0) {
//calculate slice end from array length
to = length + to;
}
to = Math.min(length, to);
logger.debug("Slice to index on array with length: {}. From index: 0 to: {}. Input: {}", length, to, toString());
if (length == 0) {
return;
}
for (int i = 0; i < to; i++) {
handleArrayIndex(i, currentPath, model, ctx);
}
break;
case SLICE_BETWEEN : //[2:4]
from = criteria.get(0);
to = criteria.get(1);
length = ctx.jsonProvider().length(model);
to = Math.min(length, to);
if (from >= to || length == 0) {
return;
}
logger.debug("Slice between indexes on array with length: {}. From index: {} to: {}. Input: {}", length, from, to, toString());
for (int i = from; i < to; i++) {
handleArrayIndex(i, currentPath, model, ctx);
}
break;
}
} catch (IndexOutOfBoundsException e) {
throw new PathNotFoundException("Index out of bounds when evaluating path " + currentPath);
}
}