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Added null and zero-sized value support
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85 changes: 85 additions & 0 deletions
85
...s/flow/src/main/java/org/opennms/netmgt/telemetry/listeners/flow/ie/values/NullValue.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /******************************************************************************* | ||
| * This file is part of OpenNMS(R). | ||
| * | ||
| * Copyright (C) 2017 The OpenNMS Group, Inc. | ||
| * OpenNMS(R) is Copyright (C) 1999-2017 The OpenNMS Group, Inc. | ||
| * | ||
| * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. | ||
| * | ||
| * OpenNMS(R) is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as published | ||
| * by the Free Software Foundation, either version 3 of the License, | ||
| * or (at your option) any later version. | ||
| * | ||
| * OpenNMS(R) 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 Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with OpenNMS(R). If not, see: | ||
| * http://www.gnu.org/licenses/ | ||
| * | ||
| * For more information contact: | ||
| * OpenNMS(R) Licensing <license@opennms.org> | ||
| * http://www.opennms.org/ | ||
| * http://www.opennms.com/ | ||
| *******************************************************************************/ | ||
|
|
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| package org.opennms.netmgt.telemetry.listeners.flow.ie.values; | ||
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| import java.nio.ByteBuffer; | ||
| import java.util.Optional; | ||
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| import org.opennms.netmgt.telemetry.listeners.flow.InvalidPacketException; | ||
| import org.opennms.netmgt.telemetry.listeners.flow.ie.InformationElement; | ||
| import org.opennms.netmgt.telemetry.listeners.flow.ie.Semantics; | ||
| import org.opennms.netmgt.telemetry.listeners.flow.ie.Value; | ||
| import org.opennms.netmgt.telemetry.listeners.flow.session.TemplateManager; | ||
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| import com.google.common.base.MoreObjects; | ||
|
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| public class NullValue extends Value<Void> { | ||
| public NullValue(final String name, | ||
| final Optional<Semantics> semantics) { | ||
| super(name, semantics); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return MoreObjects.toStringHelper(this) | ||
| .add("name", getName()) | ||
| .add("value", "(null)") | ||
| .toString(); | ||
| } | ||
|
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| public static InformationElement parser(final String name, final Optional<Semantics> semantics) { | ||
| return new InformationElement() { | ||
| @Override | ||
| public Value<?> parse(final TemplateManager.TemplateResolver templateResolver, | ||
| final ByteBuffer buffer) throws InvalidPacketException { | ||
| return new NullValue(name, semantics); | ||
| } | ||
|
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| @Override | ||
| public int getMaximumFieldLength() { | ||
| return 0; | ||
| } | ||
|
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| @Override | ||
| public int getMinimumFieldLength() { | ||
| return 0; | ||
| } | ||
| }; | ||
| } | ||
|
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| @Override | ||
| public Void getValue() { | ||
| return null; | ||
| } | ||
|
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| @Override | ||
| public void visit(final Visitor visitor) { | ||
| visitor.accept(this); | ||
| } | ||
| } |
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