String localStrategy = conf.getString(PactCompiler.HINT_LOCAL_STRATEGY, null);
if (localStrategy != null) {
final OperatorDescriptorDual fixedDriverStrat;
if (PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_BLOCKED_OUTER_FIRST.equals(localStrategy)) {
fixedDriverStrat = new CrossBlockOuterFirstDescriptor(allowBCfirst, allowBCsecond);
} else if (PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_BLOCKED_OUTER_SECOND.equals(localStrategy)) {
fixedDriverStrat = new CrossBlockOuterSecondDescriptor(allowBCfirst, allowBCsecond);
} else if (PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_STREAMED_OUTER_FIRST.equals(localStrategy)) {
fixedDriverStrat = new CrossStreamOuterFirstDescriptor(allowBCfirst, allowBCsecond);
} else if (PactCompiler.HINT_LOCAL_STRATEGY_NESTEDLOOP_STREAMED_OUTER_SECOND.equals(localStrategy)) {
fixedDriverStrat = new CrossStreamOuterSecondDescriptor(allowBCfirst, allowBCsecond);
} else {
throw new CompilerException("Invalid local strategy hint for cross contract: " + localStrategy);
}
return Collections.singletonList(fixedDriverStrat);
}
else if (operation instanceof CrossOperatorBase.CrossWithSmall) {
ArrayList<OperatorDescriptorDual> list = new ArrayList<OperatorDescriptorDual>();
list.add(new CrossBlockOuterSecondDescriptor(false, true));
list.add(new CrossStreamOuterFirstDescriptor(false, true));
return list;
}
else if (operation instanceof CrossOperatorBase.CrossWithLarge) {
ArrayList<OperatorDescriptorDual> list = new ArrayList<OperatorDescriptorDual>();
list.add(new CrossBlockOuterFirstDescriptor(true, false));
list.add(new CrossStreamOuterSecondDescriptor(true, false));
return list;
}
else {
ArrayList<OperatorDescriptorDual> list = new ArrayList<OperatorDescriptorDual>();
list.add(new CrossBlockOuterFirstDescriptor());
list.add(new CrossBlockOuterSecondDescriptor());
list.add(new CrossStreamOuterFirstDescriptor());
list.add(new CrossStreamOuterSecondDescriptor());
return list;
}