use of com.parse.ParseQuery.QueryConstraints in project Parse-SDK-Android by ParsePlatform.
the class OfflineQueryLogic method createOrMatcher.
/**
* Handles $or queries.
*/
private <T extends ParseObject> ConstraintMatcher<T> createOrMatcher(ParseUser user, ArrayList<QueryConstraints> queries) {
// Make a list of all the matchers to OR together.
final ArrayList<ConstraintMatcher<T>> matchers = new ArrayList<>();
for (QueryConstraints constraints : queries) {
ConstraintMatcher<T> matcher = createMatcher(user, constraints);
matchers.add(matcher);
}
/*
* Now OR together the constraints for each query.
*/
return new ConstraintMatcher<T>(user) {
@Override
public Task<Boolean> matchesAsync(final T object, final ParseSQLiteDatabase db) {
Task<Boolean> task = Task.forResult(false);
for (final ConstraintMatcher<T> matcher : matchers) {
task = task.onSuccessTask(new Continuation<Boolean, Task<Boolean>>() {
@Override
public Task<Boolean> then(Task<Boolean> task) throws Exception {
if (task.getResult()) {
return task;
}
return matcher.matchesAsync(object, db);
}
});
}
return task;
}
};
}
use of com.parse.ParseQuery.QueryConstraints in project Parse-SDK-Android by ParsePlatform.
the class OfflineQueryLogic method createMatcher.
/**
* Returns a ConstraintMatcher that return true iff the object matches QueryConstraints. This
* takes in a SQLiteDatabase connection because SQLite is finicky about nesting connections, so we
* want to reuse them whenever possible.
*/
private <T extends ParseObject> ConstraintMatcher<T> createMatcher(ParseUser user, QueryConstraints queryConstraints) {
// Make a list of all the matchers to AND together.
final ArrayList<ConstraintMatcher<T>> matchers = new ArrayList<>();
for (final String key : queryConstraints.keySet()) {
final Object queryConstraintValue = queryConstraints.get(key);
if (key.equals("$or")) {
/*
* A set of queries to be OR-ed together.
*/
@SuppressWarnings("unchecked") ConstraintMatcher<T> matcher = createOrMatcher(user, (ArrayList<QueryConstraints>) queryConstraintValue);
matchers.add(matcher);
} else if (queryConstraintValue instanceof KeyConstraints) {
/*
* It's a set of constraints that should be AND-ed together.
*/
KeyConstraints keyConstraints = (KeyConstraints) queryConstraintValue;
for (String operator : keyConstraints.keySet()) {
final Object keyConstraintValue = keyConstraints.get(operator);
ConstraintMatcher<T> matcher = createMatcher(user, operator, keyConstraintValue, key, keyConstraints);
matchers.add(matcher);
}
} else if (queryConstraintValue instanceof RelationConstraint) {
/*
* It's a $relatedTo constraint.
*/
final RelationConstraint relation = (RelationConstraint) queryConstraintValue;
matchers.add(new ConstraintMatcher<T>(user) {
@Override
public Task<Boolean> matchesAsync(T object, ParseSQLiteDatabase db) {
return Task.forResult(relation.getRelation().hasKnownObject(object));
}
});
} else {
/*
* It's not a set of constraints, so it's just a value to compare against.
*/
matchers.add(new ConstraintMatcher<T>(user) {
@Override
public Task<Boolean> matchesAsync(T object, ParseSQLiteDatabase db) {
Object objectValue;
try {
objectValue = getValue(object, key);
} catch (ParseException e) {
return Task.forError(e);
}
return Task.forResult(matchesEqualConstraint(queryConstraintValue, objectValue));
}
});
}
}
/*
* Now AND together the constraints for each key.
*/
return new ConstraintMatcher<T>(user) {
@Override
public Task<Boolean> matchesAsync(final T object, final ParseSQLiteDatabase db) {
Task<Boolean> task = Task.forResult(true);
for (final ConstraintMatcher<T> matcher : matchers) {
task = task.onSuccessTask(new Continuation<Boolean, Task<Boolean>>() {
@Override
public Task<Boolean> then(Task<Boolean> task) throws Exception {
if (!task.getResult()) {
return task;
}
return matcher.matchesAsync(object, db);
}
});
}
return task;
}
};
}
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