| /* |
| * Copyright (c) 2013 VMware, Inc. All Rights Reserved. |
| */ |
| package gerrit_owners; |
| |
| import com.vmware.gerrit.owners.OwnersStoredValues; |
| import com.vmware.gerrit.owners.common.PathOwners; |
| |
| import com.googlecode.prolog_cafe.lang.JavaObjectTerm; |
| import com.googlecode.prolog_cafe.lang.Operation; |
| import com.googlecode.prolog_cafe.lang.Predicate; |
| import com.googlecode.prolog_cafe.lang.Prolog; |
| import com.googlecode.prolog_cafe.lang.PrologException; |
| import com.googlecode.prolog_cafe.lang.SymbolTerm; |
| import com.googlecode.prolog_cafe.lang.Term; |
| |
| import java.util.Iterator; |
| |
| /** |
| * 'owner_path'(-Path) |
| */ |
| public class PRED_owner_path_1 extends Predicate.P1 { |
| |
| private static final PRED_owner_path_check OWNER_PATH_CHECK = new PRED_owner_path_check(); |
| private static final PRED_owner_path_empty OWNER_PATH_EMPTY = new PRED_owner_path_empty(); |
| private static final PRED_owner_path_next OWNER_PATH_NEXT = new PRED_owner_path_next(); |
| |
| public PRED_owner_path_1(Term a1, Operation n) { |
| this.arg1 = a1; |
| this.cont = n; |
| } |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| engine.cont = cont; |
| engine.setB0(); |
| |
| PathOwners owners = OwnersStoredValues.PATH_OWNERS.get(engine); |
| engine.areg1 = arg1; |
| engine.areg2 = new JavaObjectTerm(owners.get().keys().iterator()); |
| return engine.jtry2(OWNER_PATH_CHECK, OWNER_PATH_NEXT); |
| } |
| |
| private static class PRED_owner_path_check extends Operation { |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| Term a1 = engine.areg1; |
| Term a2 = engine.areg2; |
| |
| @SuppressWarnings("unchecked") |
| Iterator<String> iter = (Iterator<String>) ((JavaObjectTerm) a2).object(); |
| while (iter.hasNext()) { |
| String path = iter.next(); |
| |
| SymbolTerm pathTerm = SymbolTerm.create(path); |
| if (!a1.unify(pathTerm, engine.trail)) { |
| continue; |
| } |
| |
| return engine.cont; |
| } |
| return engine.fail(); |
| } |
| } |
| |
| private static class PRED_owner_path_next extends Operation { |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| return engine.trust(OWNER_PATH_EMPTY); |
| } |
| } |
| |
| private static class PRED_owner_path_empty extends Operation { |
| |
| @Override |
| public Operation exec(Prolog engine) throws PrologException { |
| Term a2 = engine.areg2; |
| |
| @SuppressWarnings("unchecked") |
| Iterator<String> iter = (Iterator<String>) ((JavaObjectTerm) a2).object(); |
| if (!iter.hasNext()) { |
| return engine.fail(); |
| } |
| |
| return engine.jtry2(OWNER_PATH_CHECK, OWNER_PATH_NEXT); |
| } |
| } |
| |
| } |