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Removed lots of duplicated Layout code
And uses one single version of a couple of critical methods.
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102 changes: 102 additions & 0 deletions
102
community/kernel/src/main/java/org/neo4j/kernel/impl/index/schema/SchemaLayout.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * Copyright (c) 2002-2018 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j 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. | ||
| * | ||
| * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.kernel.impl.index.schema; | ||
|
|
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| import org.neo4j.index.internal.gbptree.Layout; | ||
| import org.neo4j.io.pagecache.PageCursor; | ||
|
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| abstract class SchemaLayout<KEY extends NativeSchemaKey> extends Layout.Adapter<KEY,NativeSchemaValue> | ||
| { | ||
| private final long identifier; | ||
| private final int majorVersion; | ||
| private final int minorVersion; | ||
|
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| SchemaLayout( long identifier, int majorVersion, int minorVersion ) | ||
| { | ||
| this.identifier = identifier; | ||
| this.majorVersion = majorVersion; | ||
| this.minorVersion = minorVersion; | ||
| } | ||
|
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| @Override | ||
| public NativeSchemaValue newValue() | ||
| { | ||
| return NativeSchemaValue.INSTANCE; | ||
| } | ||
|
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| @Override | ||
| public int valueSize( NativeSchemaValue nativeSchemaValue ) | ||
| { | ||
| return NativeSchemaValue.SIZE; | ||
| } | ||
|
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| @Override | ||
| public void writeValue( PageCursor cursor, NativeSchemaValue nativeSchemaValue ) | ||
| { | ||
| // nothing to write | ||
| } | ||
|
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| @Override | ||
| public void readValue( PageCursor cursor, NativeSchemaValue into, int valueSize ) | ||
| { | ||
| // nothing to read | ||
| } | ||
|
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| @Override | ||
| public boolean fixedSize() | ||
| { | ||
| return true; // for the most case | ||
| } | ||
|
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| @Override | ||
| public long identifier() | ||
| { | ||
| return identifier; | ||
| } | ||
|
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| @Override | ||
| public int majorVersion() | ||
| { | ||
| return majorVersion; | ||
| } | ||
|
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| @Override | ||
| public int minorVersion() | ||
| { | ||
| return minorVersion; | ||
| } | ||
|
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| @Override | ||
| public final int compare( KEY o1, KEY o2 ) | ||
| { | ||
| int valueComparison = compareValue( o1, o2 ); | ||
| if ( valueComparison == 0 ) | ||
| { | ||
| // This is a special case where we need also compare entityId to support inclusive/exclusive | ||
| if ( o1.getCompareId() & o2.getCompareId() ) | ||
| { | ||
| return Long.compare( o1.getEntityId(), o2.getEntityId() ); | ||
| } | ||
| } | ||
| return valueComparison; | ||
| } | ||
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| abstract int compareValue( KEY o1, KEY o2 ); | ||
| } |
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