/* * Copyright (C) 2012, 2016 higherfrequencytrading.com * Copyright (C) 2016 Roman Leventov * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License. * * 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package net.openhft.chronicle.map.impl.stage.data; import net.openhft.chronicle.bytes.Bytes; import net.openhft.chronicle.bytes.RandomDataInput; import net.openhft.chronicle.hash.AbstractData; import net.openhft.chronicle.hash.impl.stage.hash.CheckOnEachPublicOperation; import net.openhft.chronicle.map.impl.VanillaChronicleMapHolder; import net.openhft.chronicle.map.impl.stage.map.ValueBytesInterop; import net.openhft.sg.StageRef; import net.openhft.sg.Staged; @Staged public class DummyValueZeroData<V> extends AbstractData<V> { @StageRef VanillaChronicleMapHolder<?, ?, ?> mh; @StageRef ValueBytesInterop<V> vi; @StageRef CheckOnEachPublicOperation checkOnEachPublicOperation; private final Bytes zeroBytes = ZeroBytesStore.INSTANCE.bytesForRead(); @Override public RandomDataInput bytes() { checkOnEachPublicOperation.checkOnEachPublicOperation(); return ZeroBytesStore.INSTANCE; } @Override public long offset() { checkOnEachPublicOperation.checkOnEachPublicOperation(); return 0; } @Override public long size() { checkOnEachPublicOperation.checkOnEachPublicOperation(); return Math.max(0, mh.m().valueSizeMarshaller.minStorableSize()); } @Override public V get() { checkOnEachPublicOperation.checkOnEachPublicOperation(); // Not optimized and creates garbage, because this isn't the primary // use case. Zero data should only be used in bytes form return getUsing(null); } @Override public V getUsing(V using) { checkOnEachPublicOperation.checkOnEachPublicOperation(); zeroBytes.readPosition(0); try { return vi.valueReader.read(zeroBytes, size(), using); } catch (Exception e) { throw zeroReadException(e); } } private IllegalStateException zeroReadException(Exception cause) { return new IllegalStateException(mh.h().toIdentityString() + ": Most probable cause of this exception - zero bytes of\n" + "the minimum positive encoding length, supported by the specified or default\n" + "valueSizeMarshaller() is not correct serialized form of any value. You should\n" + "configure defaultValueProvider() in ChronicleMapBuilder", cause); } }