Examples with FieldTransform com.google.firestore.v1.DocumentTransform.FieldTransform used on opensource projects

Example 6 with FieldTransform

use of com.google.firestore.v1.DocumentTransform.FieldTransform in project firebase-android-sdk by firebase.

the class Mutation method serverTransformResults.

/**
 * Creates a list of "transform results" (a transform result is a field value representing the
 * result of applying a transform) for use after a mutation containing transforms has been
 * acknowledged by the server.
 *
 * @param mutableDocument The current state of the document after applying all previous mutations.
 * @param serverTransformResults The transform results received by the server.
 * @return A map of fields to transform results.
 */
protected Map<FieldPath, Value> serverTransformResults(MutableDocument mutableDocument, List<Value> serverTransformResults) {
    Map<FieldPath, Value> transformResults = new HashMap<>(fieldTransforms.size());
    hardAssert(fieldTransforms.size() == serverTransformResults.size(), "server transform count (%d) should match field transform count (%d)", serverTransformResults.size(), fieldTransforms.size());
    for (int i = 0; i < serverTransformResults.size(); i++) {
        FieldTransform fieldTransform = fieldTransforms.get(i);
        TransformOperation transform = fieldTransform.getOperation();
        Value previousValue = mutableDocument.getField(fieldTransform.getFieldPath());
        transformResults.put(fieldTransform.getFieldPath(), transform.applyToRemoteDocument(previousValue, serverTransformResults.get(i)));
    }
    return transformResults;
}