Java tutorial
/* * Copyright (c) 2013 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.subobject; import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedInt; import com.google.common.base.Preconditions; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import org.opendaylight.protocol.pcep.spi.EROSubobjectParser; import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer; import org.opendaylight.protocol.pcep.spi.EROSubobjectUtil; import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.UnnumberedSubobject; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.UnnumberedCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.UnnumberedCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.basic.explicit.route.subobjects.subobject.type.unnumbered._case.UnnumberedBuilder; /** * Parser for {@link UnnumberedCase} */ public class EROUnnumberedInterfaceSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer { public static final int TYPE = 4; private static final int RESERVED = 2; private static final int CONTENT_LENGTH = 10; @Override public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException { Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty."); if (buffer.readableBytes() != CONTENT_LENGTH) { throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + "; Expected: " + CONTENT_LENGTH + "."); } final SubobjectBuilder builder = new SubobjectBuilder(); builder.setLoose(loose); final UnnumberedBuilder ubuilder = new UnnumberedBuilder(); buffer.skipBytes(RESERVED); ubuilder.setRouterId(buffer.readUnsignedInt()); ubuilder.setInterfaceId(buffer.readUnsignedInt()); builder.setSubobjectType(new UnnumberedCaseBuilder().setUnnumbered(ubuilder.build()).build()); return builder.build(); } @Override public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) { Preconditions.checkArgument(subobject.getSubobjectType() instanceof UnnumberedCase, "Unknown subobject instance. Passed %s. Needed UnnumberedCase.", subobject.getSubobjectType().getClass()); final UnnumberedSubobject specObj = ((UnnumberedCase) subobject.getSubobjectType()).getUnnumbered(); final ByteBuf body = Unpooled.buffer(CONTENT_LENGTH); body.writeZero(RESERVED); Preconditions.checkArgument(specObj.getRouterId() != null, "RouterId is mandatory."); writeUnsignedInt(specObj.getRouterId(), body); Preconditions.checkArgument(specObj.getInterfaceId() != null, "InterfaceId is mandatory"); writeUnsignedInt(specObj.getInterfaceId(), body); EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), body, buffer); } }