Java tutorial
/* * Copyright (c) 2015 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.spi; import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedShort; import com.google.common.base.Preconditions; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; 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.PathKey; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.PceId; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.PathKeyCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.PathKeyCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.path.key._case.PathKeyBuilder; /** * Parser for {@link PathKey} */ public abstract class AbstractEROPathKeySubobjectParser implements EROSubobjectParser, EROSubobjectSerializer { public static final int TYPE_32 = 64; public static final int TYPE_128 = 65; protected static final int PCE_ID_F_LENGTH = 4; protected static final int PCE128_ID_F_LENGTH = 16; protected static final int CONTENT128_LENGTH = 2 + PCE128_ID_F_LENGTH; protected static final int CONTENT_LENGTH = 2 + PCE_ID_F_LENGTH; protected abstract byte[] readPceId(final ByteBuf buffer); protected abstract void checkContentLenght(final int i) throws PCEPDeserializerException; @Override public final 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."); checkContentLenght(buffer.readableBytes()); final int pathKey = buffer.readUnsignedShort(); final byte[] pceId = readPceId(buffer); final PathKeyBuilder pBuilder = new PathKeyBuilder(); pBuilder.setPceId(new PceId(pceId)); pBuilder.setPathKey(new PathKey(pathKey)); final SubobjectBuilder builder = new SubobjectBuilder(); builder.setLoose(loose); builder.setSubobjectType(new PathKeyCaseBuilder().setPathKey(pBuilder.build()).build()); return builder.build(); } @Override public final void serializeSubobject(final Subobject subobject, final ByteBuf buffer) { Preconditions.checkArgument(subobject.getSubobjectType() instanceof PathKeyCase, "Unknown subobject instance. Passed %s. Needed PathKey.", subobject.getSubobjectType().getClass()); final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.path.key._case.PathKey pk = ((PathKeyCase) subobject .getSubobjectType()).getPathKey(); Preconditions.checkArgument(pk.getPceId() != null, "PceId is mandatory."); Preconditions.checkArgument(pk.getPathKey() != null, "PathKey is mandatory."); final byte[] pceID = pk.getPceId().getBinary(); Preconditions.checkArgument(pceID.length == PCE_ID_F_LENGTH || pceID.length == PCE128_ID_F_LENGTH, "PceId 32/128 Bit required."); final ByteBuf body = Unpooled.buffer(); writeUnsignedShort(pk.getPathKey().getValue(), body); body.writeBytes(pceID); EROSubobjectUtil.formatSubobject(pceID.length == PCE_ID_F_LENGTH ? TYPE_32 : TYPE_128, subobject.isLoose(), body, buffer); } }