QueryBuilder: Hold on to last property condition to use for parameter alias.

Author: greenrobot-team

objectbox-java/src/main/java/io/objectbox/query/QueryBuilder.java

@@ -94,7 +94,14 @@ enum Operator {
 
  private long handle;
 
+ /**
+ * Holds on to last condition. May be a property condition or a combined condition.
+ */
  private long lastCondition;
+ /**
+ * Holds on to last property condition to use with {@link #parameterAlias(String)}
+ */
+ private long lastPropertyCondition;
  private Operator combineNextWith = Operator.NONE;
 
  @Nullable
@@ -307,10 +314,10 @@ public QueryBuilder<T> sort(Comparator<T> comparator) {
  */
  public QueryBuilder<T> parameterAlias(String alias) {
  verifyHandle();
- if (lastCondition == 0) {
+ if (lastPropertyCondition == 0) {
  throw new IllegalStateException("No previous condition. Before you can assign an alias, you must first have a condition.");
  }
- nativeSetParameterAlias(lastCondition, alias);
+ nativeSetParameterAlias(lastPropertyCondition, alias);
  return this;
  }
 
@@ -478,6 +485,7 @@ private void checkCombineCondition(long currentCondition) {
  } else {
  lastCondition = currentCondition;
  }
+ lastPropertyCondition = currentCondition;
  }
 
  public QueryBuilder<T> isNull(Property<T> property) {