/*
* Copyright 2003-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.generator.plan;
import org.jetbrains.annotations.NotNull;
/**
* Provisional way to identify checkpoint within a generation plan without resorting to String.
* FIXME Once I've got a better idea what I can use to identify CP, this class likely shall become
* an interface with hashCode/equals, persistence and presentation contract, like {@link PlanIdentity}.
* Or a final class if there's only 1 way to identify CP.
*
* It seems there's no difference in Checkpoint vs CheckpointIdentity (both are presentation and persistence strings).
* However, I keep them separate for few reasons:
* (a) there's PlanIdentity as I can't persist ModelGenerationPlan, so would be strange to identify CP with (PlanIdentity,Checkpoint)
* (b) I might want to expose MGP from Checkpoint (parent/child hierarchy), which would not be possible for persistent cp identity
* @author Artem Tikhomirov
* @since 3.4
*/
public final class CheckpointIdentity {
private final PlanIdentity myPlan;
private final String myName;
// FIXME CheckpointIdentity with Checkpoint argument uses human-friendly name, while
// uses of this cons resort to persistent value. Hence equals for same checkpoint identities failed
// (comparing myName) and I need to compare persistence values instead (see equals(), implying PV(PV()) is idempotent).
// Need to keep name distinct from persistence value and use both correctly.
public CheckpointIdentity(@NotNull PlanIdentity plan, @NotNull String cpName) {
myPlan = plan;
myName = cpName;
}
@NotNull
public String getName() {
return myName;
}
/**
* Not sure I need this one as part of identity interface. Perhaps, identity string could be specified
* explicitly in a GP model (with default == toPersistentValue(name)).
* @return value one can safely write e.g. in a file system.
*/
@NotNull
public String getPersistenceValue() {
return PlanIdentity.toPersistenceValue(myName);
}
public PlanIdentity getPlan() {
return myPlan;
}
@Override
public int hashCode() {
return myName.hashCode();
}
@Override
public boolean equals(Object o) {
if (o instanceof CheckpointIdentity) {
CheckpointIdentity other = (CheckpointIdentity) o;
return other.myPlan.equals(myPlan) && other.myName.equals(myName);
}
return false;
}
@Override
public String toString() {
return String.format("CP[%s.%s]", myPlan.getName(), myName);
}
}