com.sun.electric.database.LibraryBackup Maven / Gradle / Ivy
/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: LibraryBackup.java
* Written by: Dmitry Nadezhin, Sun Microsystems.
*
* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.database;
import com.sun.electric.database.id.IdReader;
import com.sun.electric.database.id.IdWriter;
import com.sun.electric.database.id.LibId;
import com.sun.electric.util.collections.ImmutableArrayList;
import java.io.IOException;
/**
*
*/
public class LibraryBackup {
public static final LibraryBackup[] NULL_ARRAY = {};
public static final ImmutableArrayList EMPTY_LIST = new ImmutableArrayList(NULL_ARRAY);
/** Library persistent data. */
public final ImmutableLibrary d;
/** True if library needs saving to disk. */
public final boolean modified;
/** Array of referenced libs */
public final LibId[] referencedLibs;
/** Creates a new instance of LibraryBackup */
public LibraryBackup(ImmutableLibrary d, boolean modified, LibId[] referencedLibs) {
this.d = d;
this.modified = modified;
this.referencedLibs = referencedLibs;
}
/**
* Returns LibraryBackup which differs from this LibraryBackup by "modified" flag set.
* @return LibraryBackup with "modified" flag set.
*/
LibraryBackup withModified() {
if (modified) {
return this;
}
return new LibraryBackup(d, true, referencedLibs);
}
/**
* Returns LibraryBackup which differs from this LibraryBackup by renamed Ids.
* @param idMapper a map from old Ids to new Ids.
* @return LibraryBackup with renamed Ids.
*/
LibraryBackup withRenamedIds(IdMapper idMapper) {
ImmutableLibrary d = this.d.withRenamedIds(idMapper);
LibId[] referencedLibs = null;
for (int i = 0; i < this.referencedLibs.length; i++) {
LibId oldLibId = this.referencedLibs[i];
LibId newLibId = idMapper.get(oldLibId);
if (newLibId != oldLibId && referencedLibs == null) {
referencedLibs = new LibId[this.referencedLibs.length];
System.arraycopy(this.referencedLibs, 0, referencedLibs, 0, referencedLibs.length);
}
if (referencedLibs != null) {
referencedLibs[i] = newLibId;
}
}
if (referencedLibs == null) {
referencedLibs = this.referencedLibs;
}
if (this.d == d && this.referencedLibs == referencedLibs) {
return this;
}
LibraryBackup newBackup = new LibraryBackup(d, true, referencedLibs);
newBackup.check();
return newBackup;
}
/**
* Writes this LibraryBackup to IdWriter.
* @param writer where to write.
*/
void write(IdWriter writer) throws IOException {
d.write(writer);
writer.writeBoolean(modified);
writer.writeInt(referencedLibs.length);
for (int i = 0; i < referencedLibs.length; i++) {
writer.writeLibId(referencedLibs[i]);
}
}
/**
* Reads LibraryBackup from SnapshotReader.
* @param reader where to read.
*/
static LibraryBackup read(IdReader reader) throws IOException {
ImmutableLibrary d = ImmutableLibrary.read(reader);
boolean modified = reader.readBoolean();
int refsLength = reader.readInt();
LibId[] refs = new LibId[refsLength];
for (int i = 0; i < refsLength; i++) {
refs[i] = reader.readLibId();
}
return new LibraryBackup(d, modified, refs);
}
/**
* Checks invariant of this CellBackup.
* @throws AssertionError if invariant is broken.
*/
public void check() {
d.check();
for (LibId libId : referencedLibs) {
assert libId != null;
}
}
@Override
public String toString() {
return d.toString();
}
}