/*
* Copyright 2003-2014 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.persistence.registry;
/**
* we use text index for xml files, and ordering/integer index for binary files.
* Index values either persisted or initialized by intrinsic ordering of meta-model information saved in the model
*/
/*package*/ abstract class BaseInfo {
private String myIndex;
private int myIntIndex = -1;
public String getIndex() {
assert myIndex != null;
return myIndex;
}
public int getIntIndex() {
return myIntIndex;
}
public void setIntIndex(int index) {
myIntIndex = index;
}
/*package*/ void setIndex(String index) {
myIndex = index;
}
/*package*/ abstract int internalKey();
// long to signed integer
protected static final int ltoi(long l) {
return ((int) (l ^ (l>>>32)));
}
// FIXME drop this method (make ltoi to return unsigned value). Meanwhile, use non-negative values for comparator purposes only - I'd like to keep
// models mostly unchanged to check merge
protected static final int unsigned(int i) {
return i & 0x7fffffff;
}
}