Bug-2226: RFC5886 - New objects parsers/seriazers

[bgpcep.git] / pcep / impl / src / main / java / org / opendaylight / protocol / pcep / impl / object / PCEPMonitoringObjectParser.java

diff --git a/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPMonitoringObjectParser.java b/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPMonitoringObjectParser.java
new file mode 100644 (file)
index 0000000..efd734e
--- /dev/null
+++ b/pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPMonitoringObjectParser.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.protocol.pcep.impl.object;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import java.util.BitSet;
+import java.util.List;
+import org.opendaylight.protocol.pcep.spi.AbstractObjectWithTlvsParser;
+import org.opendaylight.protocol.pcep.spi.ObjectUtil;
+import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
+import org.opendaylight.protocol.pcep.spi.TlvRegistry;
+import org.opendaylight.protocol.pcep.spi.VendorInformationTlvRegistry;
+import org.opendaylight.protocol.util.ByteArray;
+import org.opendaylight.protocol.util.ByteBufWriteUtil;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.monitoring.object.Monitoring;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.monitoring.object.Monitoring.Flags;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.monitoring.object.MonitoringBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.monitoring.object.monitoring.Tlvs;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.monitoring.object.monitoring.TlvsBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.vendor.information.tlvs.VendorInformationTlv;
+
+/**
+ * Parser for {@link Monitoring}
+ * @see https://tools.ietf.org/html/rfc5886#section-4.1
+ */
+public class PCEPMonitoringObjectParser extends AbstractObjectWithTlvsParser<TlvsBuilder> {
+
+    public static final int CLASS = 19;
+
+    public static final int TYPE = 1;
+
+    private static final int FLAGS = 3;
+    private static final int RESERVED = 1;
+    private static final int L_FLAG_POS = 23;
+    private static final int G_FLAG_POS = 22;
+    private static final int P_FLAG_POS = 21;
+    private static final int C_FLAG_POS = 20;
+    private static final int I_FLAG_POS = 19;
+
+    public PCEPMonitoringObjectParser(final TlvRegistry tlvReg, final VendorInformationTlvRegistry viTlvReg) {
+        super(tlvReg, viTlvReg);
+    }
+
+    @Override
+    public Object parseObject(final ObjectHeader header, final ByteBuf buffer) throws PCEPDeserializerException {
+        Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
+        final MonitoringBuilder builder = new MonitoringBuilder();
+        buffer.readBytes(RESERVED);
+        final BitSet flagBits = ByteArray.bytesToBitSet(buffer.readBytes(FLAGS).array());
+        final Flags flags = new Flags(flagBits.get(G_FLAG_POS), flagBits.get(I_FLAG_POS), flagBits.get(L_FLAG_POS),
+                flagBits.get(C_FLAG_POS), flagBits.get(P_FLAG_POS));
+        builder.setFlags(flags);
+        builder.setMonitoringId(buffer.readUnsignedInt());
+        final TlvsBuilder tbuilder = new TlvsBuilder();
+        parseTlvs(tbuilder, buffer.slice());
+        builder.setTlvs(tbuilder.build());
+        return builder.build();
+    }
+
+    @Override
+    public void serializeObject(final Object object, final ByteBuf buffer) {
+        Preconditions.checkArgument(object instanceof Monitoring, "Wrong instance of PCEPObject. Passed %s. Needed MonitoringObject.", object.getClass());
+        final Monitoring monitoring = (Monitoring) object;
+        final ByteBuf body = Unpooled.buffer();
+        body.writeZero(RESERVED);
+        final Flags flags = monitoring.getFlags();
+        final BitSet flagBits = new BitSet(FLAGS);
+        flagBits.set(I_FLAG_POS, flags.isIncomplete());
+        flagBits.set(C_FLAG_POS, flags.isOverload());
+        flagBits.set(P_FLAG_POS, flags.isProcessingTime());
+        flagBits.set(G_FLAG_POS, flags.isGeneral());
+        flagBits.set(L_FLAG_POS, flags.isLiveness());
+        ByteBufWriteUtil.writeBitSet(flagBits, FLAGS, body);
+        ByteBufWriteUtil.writeUnsignedInt(monitoring.getMonitoringId(), body);
+        serializeTlvs(monitoring.getTlvs(), body);
+        ObjectUtil.formatSubobject(TYPE, CLASS, object.isProcessingRule(), object.isIgnore(), body, buffer);
+    }
+
+    @Override
+    protected void addVendorInformationTlvs(final TlvsBuilder builder, final List<VendorInformationTlv> tlvs) {
+        if (!tlvs.isEmpty()) {
+            builder.setVendorInformationTlv(tlvs);
+        }
+    }
+
+    public void serializeTlvs(final Tlvs tlvs, final ByteBuf body) {
+        if (tlvs == null) {
+            return;
+        }
+        serializeVendorInformationTlvs(tlvs.getVendorInformationTlv(), body);
+    }
+
+}