/*
* Copyright 2003-2011 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.smodel;
import jetbrains.mps.smodel.references.UnregisteredNodes;
import jetbrains.mps.util.EqualUtil;
import jetbrains.mps.util.StringUtil;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.annotations.Immutable;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.model.SModelReference;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeId;
import org.jetbrains.mps.openapi.model.SNodeReference;
import org.jetbrains.mps.openapi.module.SRepository;
import org.jetbrains.mps.openapi.persistence.PersistenceFacade;
@Immutable
public class SNodePointer implements SNodeReference {
@Nullable
private final SModelReference myModelReference;
@Nullable
private final SNodeId myNodeId;
public SNodePointer(String modelUID, String nodeId) {
this(PersistenceFacade.getInstance().createModelReference(modelUID), PersistenceFacade.getInstance().createNodeId(nodeId));
}
public SNodePointer(SNode node) {
if (node == null || node.getModel() == null) {
myModelReference = null;
myNodeId = null;
return;
}
myModelReference = node.getModel().getReference();
myNodeId = node.getNodeId();
}
public SNodePointer(@Nullable SModelReference modelReference, @Nullable SNodeId nodeId) {
myModelReference = modelReference;
myNodeId = nodeId;
}
@Nullable
@Override
public SNode resolve(SRepository repo) {
if (myNodeId == null) return null;
if (myModelReference != null) {
SModel model = myModelReference.resolve(repo);
if (model != null) {
SNode node = model.getNode(myNodeId);
if (node != null) {
return node;
}
}
}
UnregisteredNodes unregisteredNodes = UnregisteredNodes.instance();
if (unregisteredNodes != null) {
return unregisteredNodes.get(myModelReference, myNodeId);
}
return null;
}
@Nullable
@Override
public SModelReference getModelReference() {
return myModelReference;
}
public String toString() {
return myModelReference + "/" + StringUtil.escapeRefChars("" + myNodeId);
}
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || !(o instanceof SNodePointer)) return false;
SNodePointer np = (SNodePointer) o;
return EqualUtil.equals(myModelReference, np.myModelReference) && EqualUtil.equals(myNodeId, np.myNodeId);
}
public int hashCode() {
int sum = 0;
if (myModelReference != null) {
sum += myModelReference.hashCode();
}
if (myNodeId != null) {
sum += 11 * myNodeId.hashCode();
}
return sum;
}
public static String serialize(SNodeReference p) {
SNodePointer np = (SNodePointer) p;
SModelReference ref = np.myModelReference;
SNodeId id = np.myNodeId;
assert ref != null && id != null;
return ref.toString() + "/" + StringUtil.escapeRefChars(id.toString());
}
public static SNodeReference deserialize(String from) {
int delimiterIndex = from.lastIndexOf("/");
String nodeId = StringUtil.unescapeRefChars(from.substring(delimiterIndex + 1));
String modelReference = from.substring(0, delimiterIndex);
return new jetbrains.mps.smodel.SNodePointer(modelReference, nodeId);
}
@Nullable
@Override
public SNodeId getNodeId() {
return myNodeId;
}
}