Java tutorial
/* * Copyright 2015-present Open Networking Foundation * * 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 org.onosproject.codec.impl; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.node.ObjectNode; import com.google.common.collect.Maps; import org.onlab.osgi.DefaultServiceDirectory; import org.onlab.osgi.ServiceDirectory; import org.onlab.packet.EthType; import org.onlab.packet.IpAddress; import org.onlab.packet.MacAddress; import org.onlab.packet.MplsLabel; import org.onlab.packet.TpPort; import org.onlab.packet.VlanId; import org.onlab.util.HexString; import org.onlab.util.ImmutableByteSequence; import org.onosproject.codec.CodecContext; import org.onosproject.net.flow.ExtensionTreatmentCodec; import org.onosproject.core.GroupId; import org.onosproject.net.ChannelSpacing; import org.onosproject.net.Device; import org.onosproject.net.DeviceId; import org.onosproject.net.GridType; import org.onosproject.net.OchSignal; import org.onosproject.net.OduSignalId; import org.onosproject.net.PortNumber; import org.onosproject.net.device.DeviceService; import org.onosproject.net.flow.StatTriggerField; import org.onosproject.net.flow.StatTriggerFlag; import org.onosproject.net.flow.instructions.ExtensionTreatment; import org.onosproject.net.flow.instructions.Instruction; import org.onosproject.net.flow.instructions.Instructions; import org.onosproject.net.flow.instructions.L0ModificationInstruction; import org.onosproject.net.flow.instructions.L1ModificationInstruction; import org.onosproject.net.flow.instructions.L2ModificationInstruction; import org.onosproject.net.flow.instructions.L3ModificationInstruction; import org.onosproject.net.flow.instructions.L4ModificationInstruction; import org.onosproject.net.meter.MeterId; import org.onosproject.net.pi.model.PiActionId; import org.onosproject.net.pi.model.PiActionParamId; import org.onosproject.net.pi.runtime.PiAction; import org.onosproject.net.pi.runtime.PiActionGroupId; import org.onosproject.net.pi.runtime.PiActionGroupMemberId; import org.onosproject.net.pi.runtime.PiActionParam; import org.onosproject.net.pi.runtime.PiTableAction; import org.slf4j.Logger; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import static org.onlab.util.Tools.nullIsIllegal; import static org.onosproject.codec.impl.InstructionCodec.STAT_PACKET_COUNT; import static org.slf4j.LoggerFactory.getLogger; /** * Decoding portion of the instruction codec. */ public final class DecodeInstructionCodecHelper { private static final Logger log = getLogger(DecodeInstructionCodecHelper.class); private final ObjectNode json; private final CodecContext context; private static final Pattern ETHTYPE_PATTERN = Pattern.compile("0x([0-9a-fA-F]{4})"); /** * Creates a decode instruction codec object. * * @param json JSON object to decode * @param context codec context */ public DecodeInstructionCodecHelper(ObjectNode json, CodecContext context) { this.json = json; this.context = context; } /** * Decodes a Layer 2 instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodeL2() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(L2ModificationInstruction.L2SubType.ETH_SRC.name())) { String mac = nullIsIllegal(json.get(InstructionCodec.MAC), InstructionCodec.MAC + InstructionCodec.MISSING_MEMBER_MESSAGE).asText(); return Instructions.modL2Src(MacAddress.valueOf(mac)); } else if (subType.equals(L2ModificationInstruction.L2SubType.ETH_DST.name())) { String mac = nullIsIllegal(json.get(InstructionCodec.MAC), InstructionCodec.MAC + InstructionCodec.MISSING_MEMBER_MESSAGE).asText(); return Instructions.modL2Dst(MacAddress.valueOf(mac)); } else if (subType.equals(L2ModificationInstruction.L2SubType.VLAN_ID.name())) { short vlanId = (short) nullIsIllegal(json.get(InstructionCodec.VLAN_ID), InstructionCodec.VLAN_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); return Instructions.modVlanId(VlanId.vlanId(vlanId)); } else if (subType.equals(L2ModificationInstruction.L2SubType.VLAN_PCP.name())) { byte vlanPcp = (byte) nullIsIllegal(json.get(InstructionCodec.VLAN_PCP), InstructionCodec.VLAN_PCP + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); return Instructions.modVlanPcp(vlanPcp); } else if (subType.equals(L2ModificationInstruction.L2SubType.MPLS_LABEL.name())) { int label = nullIsIllegal(json.get(InstructionCodec.MPLS_LABEL), InstructionCodec.MPLS_LABEL + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); return Instructions.modMplsLabel(MplsLabel.mplsLabel(label)); } else if (subType.equals(L2ModificationInstruction.L2SubType.MPLS_PUSH.name())) { return Instructions.pushMpls(); } else if (subType.equals(L2ModificationInstruction.L2SubType.MPLS_POP.name())) { if (json.has(InstructionCodec.ETHERNET_TYPE)) { return Instructions.popMpls(getEthType()); } return Instructions.popMpls(); } else if (subType.equals(L2ModificationInstruction.L2SubType.DEC_MPLS_TTL.name())) { return Instructions.decMplsTtl(); } else if (subType.equals(L2ModificationInstruction.L2SubType.VLAN_POP.name())) { return Instructions.popVlan(); } else if (subType.equals(L2ModificationInstruction.L2SubType.VLAN_PUSH.name())) { if (json.has(InstructionCodec.ETHERNET_TYPE)) { return Instructions.pushVlan(getEthType()); } return Instructions.pushVlan(); } else if (subType.equals(L2ModificationInstruction.L2SubType.TUNNEL_ID.name())) { long tunnelId = nullIsIllegal(json.get(InstructionCodec.TUNNEL_ID), InstructionCodec.TUNNEL_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asLong(); return Instructions.modTunnelId(tunnelId); } throw new IllegalArgumentException("L2 Instruction subtype " + subType + " is not supported"); } /** * Decodes a Layer 3 instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodeL3() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(L3ModificationInstruction.L3SubType.IPV4_SRC.name())) { IpAddress ip = IpAddress.valueOf(nullIsIllegal(json.get(InstructionCodec.IP), InstructionCodec.IP + InstructionCodec.MISSING_MEMBER_MESSAGE).asText()); return Instructions.modL3Src(ip); } else if (subType.equals(L3ModificationInstruction.L3SubType.IPV4_DST.name())) { IpAddress ip = IpAddress.valueOf(nullIsIllegal(json.get(InstructionCodec.IP), InstructionCodec.IP + InstructionCodec.MISSING_MEMBER_MESSAGE).asText()); return Instructions.modL3Dst(ip); } else if (subType.equals(L3ModificationInstruction.L3SubType.IPV6_SRC.name())) { IpAddress ip = IpAddress.valueOf(nullIsIllegal(json.get(InstructionCodec.IP), InstructionCodec.IP + InstructionCodec.MISSING_MEMBER_MESSAGE).asText()); return Instructions.modL3IPv6Src(ip); } else if (subType.equals(L3ModificationInstruction.L3SubType.IPV6_DST.name())) { IpAddress ip = IpAddress.valueOf(nullIsIllegal(json.get(InstructionCodec.IP), InstructionCodec.IP + InstructionCodec.MISSING_MEMBER_MESSAGE).asText()); return Instructions.modL3IPv6Dst(ip); } else if (subType.equals(L3ModificationInstruction.L3SubType.IPV6_FLABEL.name())) { int flowLabel = nullIsIllegal(json.get(InstructionCodec.FLOW_LABEL), InstructionCodec.FLOW_LABEL + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); return Instructions.modL3IPv6FlowLabel(flowLabel); } else if (subType.equals(L3ModificationInstruction.L3SubType.TTL_IN.name())) { return Instructions.copyTtlIn(); } else if (subType.equals(L3ModificationInstruction.L3SubType.TTL_OUT.name())) { return Instructions.copyTtlOut(); } else if (subType.equals(L3ModificationInstruction.L3SubType.DEC_TTL.name())) { return Instructions.decNwTtl(); } throw new IllegalArgumentException("L3 Instruction subtype " + subType + " is not supported"); } /** * Decodes a Layer 0 instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodeL0() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(L0ModificationInstruction.L0SubType.OCH.name())) { String gridTypeString = nullIsIllegal(json.get(InstructionCodec.GRID_TYPE), InstructionCodec.GRID_TYPE + InstructionCodec.MISSING_MEMBER_MESSAGE).asText(); GridType gridType = GridType.valueOf(gridTypeString); if (gridType == null) { throw new IllegalArgumentException("Unknown grid type " + gridTypeString); } String channelSpacingString = nullIsIllegal(json.get(InstructionCodec.CHANNEL_SPACING), InstructionCodec.CHANNEL_SPACING + InstructionCodec.MISSING_MEMBER_MESSAGE).asText(); ChannelSpacing channelSpacing = ChannelSpacing.valueOf(channelSpacingString); if (channelSpacing == null) { throw new IllegalArgumentException("Unknown channel spacing " + channelSpacingString); } int spacingMultiplier = nullIsIllegal(json.get(InstructionCodec.SPACING_MULTIPLIER), InstructionCodec.SPACING_MULTIPLIER + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); int slotGranularity = nullIsIllegal(json.get(InstructionCodec.SLOT_GRANULARITY), InstructionCodec.SLOT_GRANULARITY + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); return Instructions .modL0Lambda(new OchSignal(gridType, channelSpacing, spacingMultiplier, slotGranularity)); } throw new IllegalArgumentException("L0 Instruction subtype " + subType + " is not supported"); } /** * Decodes a Layer 1 instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodeL1() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(L1ModificationInstruction.L1SubType.ODU_SIGID.name())) { int tributaryPortNumber = nullIsIllegal(json.get(InstructionCodec.TRIBUTARY_PORT_NUMBER), InstructionCodec.TRIBUTARY_PORT_NUMBER + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); int tributarySlotLen = nullIsIllegal(json.get(InstructionCodec.TRIBUTARY_SLOT_LEN), InstructionCodec.TRIBUTARY_SLOT_LEN + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt(); byte[] tributarySlotBitmap = null; tributarySlotBitmap = HexString .fromHexString(nullIsIllegal(json.get(InstructionCodec.TRIBUTARY_SLOT_BITMAP), InstructionCodec.TRIBUTARY_SLOT_BITMAP + InstructionCodec.MISSING_MEMBER_MESSAGE) .asText()); return Instructions.modL1OduSignalId( OduSignalId.oduSignalId(tributaryPortNumber, tributarySlotLen, tributarySlotBitmap)); } throw new IllegalArgumentException("L1 Instruction subtype " + subType + " is not supported"); } /** * Decodes a Layer 4 instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodeL4() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(L4ModificationInstruction.L4SubType.TCP_DST.name())) { TpPort tcpPort = TpPort.tpPort(nullIsIllegal(json.get(InstructionCodec.TCP_PORT), InstructionCodec.TCP_PORT + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.modTcpDst(tcpPort); } else if (subType.equals(L4ModificationInstruction.L4SubType.TCP_SRC.name())) { TpPort tcpPort = TpPort.tpPort(nullIsIllegal(json.get(InstructionCodec.TCP_PORT), InstructionCodec.TCP_PORT + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.modTcpSrc(tcpPort); } else if (subType.equals(L4ModificationInstruction.L4SubType.UDP_DST.name())) { TpPort udpPort = TpPort.tpPort(nullIsIllegal(json.get(InstructionCodec.UDP_PORT), InstructionCodec.UDP_PORT + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.modUdpDst(udpPort); } else if (subType.equals(L4ModificationInstruction.L4SubType.UDP_SRC.name())) { TpPort udpPort = TpPort.tpPort(nullIsIllegal(json.get(InstructionCodec.UDP_PORT), InstructionCodec.UDP_PORT + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.modUdpSrc(udpPort); } throw new IllegalArgumentException("L4 Instruction subtype " + subType + " is not supported"); } /** * Decodes a protocol-independent instruction. * * @return instruction object decoded from the JSON * @throws IllegalArgumentException if the JSON is invalid */ private Instruction decodePi() { String subType = nullIsIllegal(json.get(InstructionCodec.SUBTYPE), InstructionCodec.SUBTYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (subType.equals(PiTableAction.Type.ACTION.name())) { PiActionId piActionId = PiActionId.of(nullIsIllegal(json.get(InstructionCodec.PI_ACTION_ID), InstructionCodec.PI_ACTION_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asText()); JsonNode params = json.get(InstructionCodec.PI_ACTION_PARAMS); PiAction.Builder builder = PiAction.builder(); PiActionParam piActionParam; PiActionParamId piActionParamId; if (params != null) { for (Map.Entry<String, String> param : ((Map<String, String>) (context.mapper().convertValue(params, Map.class))).entrySet()) { piActionParamId = PiActionParamId.of(param.getKey()); piActionParam = new PiActionParam(piActionParamId, ImmutableByteSequence.copyFrom(HexString.fromHexString(param.getValue(), null))); builder.withParameter(piActionParam); } } return Instructions.piTableAction(builder.withId(piActionId).build()); } else if (subType.equals(PiTableAction.Type.ACTION_GROUP_ID.name())) { PiActionGroupId piActionGroupId = PiActionGroupId .of(nullIsIllegal(json.get(InstructionCodec.PI_ACTION_GROUP_ID), InstructionCodec.PI_ACTION_GROUP_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.piTableAction(piActionGroupId); } else if (subType.equals(PiTableAction.Type.GROUP_MEMBER_ID.name())) { PiActionGroupMemberId piActionGroupMemberId = PiActionGroupMemberId .of(nullIsIllegal(json.get(InstructionCodec.PI_ACTION_GROUP_MEMBER_ID), InstructionCodec.PI_ACTION_GROUP_MEMBER_ID + InstructionCodec.MISSING_MEMBER_MESSAGE) .asInt()); return Instructions.piTableAction(piActionGroupMemberId); } throw new IllegalArgumentException( "Protocol-independent Instruction subtype " + subType + " is not supported"); } private Instruction decodeStatTrigger() { String statTriggerFlag = nullIsIllegal(json.get(InstructionCodec.STAT_TRIGGER_FLAG), InstructionCodec.STAT_TRIGGER_FLAG + InstructionCodec.ERROR_MESSAGE).asText(); StatTriggerFlag flag = null; if (statTriggerFlag.equals(StatTriggerFlag.ONLY_FIRST.name())) { flag = StatTriggerFlag.ONLY_FIRST; } else if (statTriggerFlag.equals(StatTriggerFlag.PERIODIC.name())) { flag = StatTriggerFlag.PERIODIC; } else { throw new IllegalArgumentException("statTriggerFlag " + statTriggerFlag + " is not supported"); } if (!json.has(InstructionCodec.STAT_THRESHOLDS)) { throw new IllegalArgumentException("statThreshold is not added"); } JsonNode statThresholdsNode = nullIsIllegal(json.get(InstructionCodec.STAT_THRESHOLDS), InstructionCodec.STAT_THRESHOLDS + InstructionCodec.ERROR_MESSAGE); Map<StatTriggerField, Long> statThresholdMap = getStatThreshold(statThresholdsNode); if (statThresholdMap.isEmpty()) { throw new IllegalArgumentException("statThreshold must have at least one property"); } return Instructions.statTrigger(statThresholdMap, flag); } private Map<StatTriggerField, Long> getStatThreshold(JsonNode statThresholdNode) { Map<StatTriggerField, Long> statThresholdMap = Maps.newEnumMap(StatTriggerField.class); for (JsonNode jsonNode : statThresholdNode) { if (jsonNode.hasNonNull(InstructionCodec.STAT_BYTE_COUNT)) { JsonNode byteCountNode = jsonNode.get(InstructionCodec.STAT_BYTE_COUNT); if (!byteCountNode.isNull() && byteCountNode.isNumber()) { statThresholdMap.put(StatTriggerField.BYTE_COUNT, byteCountNode.asLong()); } } else if (jsonNode.hasNonNull(STAT_PACKET_COUNT)) { JsonNode packetCount = jsonNode.get(STAT_PACKET_COUNT); if (!packetCount.isNull() && packetCount.isNumber()) { statThresholdMap.put(StatTriggerField.PACKET_COUNT, packetCount.asLong()); } } else if (jsonNode.hasNonNull(InstructionCodec.STAT_DURATION)) { JsonNode duration = jsonNode.get(InstructionCodec.STAT_DURATION); if (!duration.isNull() && duration.isNumber()) { statThresholdMap.put(StatTriggerField.DURATION, duration.asLong()); } } else { log.error("Unsupported stat {}", jsonNode.toString()); } } return statThresholdMap; } /** * Decodes a extension instruction. * * @return extension treatment */ private Instruction decodeExtension() { ObjectNode node = (ObjectNode) json.get(InstructionCodec.EXTENSION); if (node != null) { DeviceId deviceId = getDeviceId(); ServiceDirectory serviceDirectory = new DefaultServiceDirectory(); DeviceService deviceService = serviceDirectory.get(DeviceService.class); Device device = deviceService.getDevice(deviceId); if (device == null) { throw new IllegalArgumentException("Device not found"); } if (device.is(ExtensionTreatmentCodec.class)) { ExtensionTreatmentCodec treatmentCodec = device.as(ExtensionTreatmentCodec.class); ExtensionTreatment treatment = treatmentCodec.decode(node, context); return Instructions.extension(treatment, deviceId); } else { throw new IllegalArgumentException( "There is no codec to decode extension for device " + deviceId.toString()); } } return null; } /** * Returns device identifier. * * @return device identifier * @throws IllegalArgumentException if the JSON is invalid */ private DeviceId getDeviceId() { JsonNode deviceIdNode = json.get(InstructionCodec.DEVICE_ID); if (deviceIdNode != null) { return DeviceId.deviceId(deviceIdNode.asText()); } throw new IllegalArgumentException("Empty device identifier"); } /** * Extracts port number of the given json node. * * @param jsonNode json node * @return port number */ private PortNumber getPortNumber(ObjectNode jsonNode) { PortNumber portNumber; JsonNode portNode = nullIsIllegal(jsonNode.get(InstructionCodec.PORT), InstructionCodec.PORT + InstructionCodec.ERROR_MESSAGE); if (portNode.isLong() || portNode.isInt()) { portNumber = PortNumber.portNumber(portNode.asLong()); } else if (portNode.isTextual()) { portNumber = PortNumber.fromString(portNode.textValue()); } else { throw new IllegalArgumentException("Port value " + portNode.toString() + " is not supported"); } return portNumber; } /** * Returns Ethernet type. * * @return ethernet type * @throws IllegalArgumentException if the JSON is invalid */ private EthType getEthType() { String ethTypeStr = nullIsIllegal(json.get(InstructionCodec.ETHERNET_TYPE), InstructionCodec.ETHERNET_TYPE + InstructionCodec.MISSING_MEMBER_MESSAGE).asText(); Matcher matcher = ETHTYPE_PATTERN.matcher(ethTypeStr); if (!matcher.matches()) { throw new IllegalArgumentException("ETHERNET_TYPE must be a four digit hex string starting with 0x"); } short ethernetType = (short) Integer.parseInt(matcher.group(1), 16); return new EthType(ethernetType); } /** * Decodes the JSON into an instruction object. * * @return Criterion object * @throws IllegalArgumentException if the JSON is invalid */ public Instruction decode() { String type = nullIsIllegal(json.get(InstructionCodec.TYPE), InstructionCodec.TYPE + InstructionCodec.ERROR_MESSAGE).asText(); if (type.equals(Instruction.Type.OUTPUT.name())) { return Instructions.createOutput(getPortNumber(json)); } else if (type.equals(Instruction.Type.NOACTION.name())) { return Instructions.createNoAction(); } else if (type.equals(Instruction.Type.TABLE.name())) { return Instructions.transition(nullIsIllegal(json.get(InstructionCodec.TABLE_ID), InstructionCodec.TABLE_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); } else if (type.equals(Instruction.Type.GROUP.name())) { GroupId groupId = new GroupId(nullIsIllegal(json.get(InstructionCodec.GROUP_ID), InstructionCodec.GROUP_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asInt()); return Instructions.createGroup(groupId); } else if (type.equals(Instruction.Type.METER.name())) { MeterId meterId = MeterId.meterId(nullIsIllegal(json.get(InstructionCodec.METER_ID), InstructionCodec.METER_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asLong()); return Instructions.meterTraffic(meterId); } else if (type.equals(Instruction.Type.QUEUE.name())) { long queueId = nullIsIllegal(json.get(InstructionCodec.QUEUE_ID), InstructionCodec.QUEUE_ID + InstructionCodec.MISSING_MEMBER_MESSAGE).asLong(); if (json.get(InstructionCodec.PORT) == null || json.get(InstructionCodec.PORT).isNull()) { return Instructions.setQueue(queueId, null); } else { return Instructions.setQueue(queueId, getPortNumber(json)); } } else if (type.equals(Instruction.Type.L0MODIFICATION.name())) { return decodeL0(); } else if (type.equals(Instruction.Type.L1MODIFICATION.name())) { return decodeL1(); } else if (type.equals(Instruction.Type.L2MODIFICATION.name())) { return decodeL2(); } else if (type.equals(Instruction.Type.L3MODIFICATION.name())) { return decodeL3(); } else if (type.equals(Instruction.Type.L4MODIFICATION.name())) { return decodeL4(); } else if (type.equals(Instruction.Type.EXTENSION.name())) { return decodeExtension(); } else if (type.equals(Instruction.Type.STAT_TRIGGER.name())) { return decodeStatTrigger(); } else if (type.equals(Instruction.Type.PROTOCOL_INDEPENDENT.name())) { return decodePi(); } throw new IllegalArgumentException("Instruction type " + type + " is not supported"); } }