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 com.google.common.base.Preconditions; import com.google.common.collect.Lists; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import java.util.ArrayList; import java.util.List; 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.protocol.pcep.spi.XROSubobjectRegistry; import org.opendaylight.protocol.util.Values; 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.explicit.route.subobjects.subobject.type.ExrsCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.ExrsCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.Exrs; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.ExrsBuilder; public class EROExplicitExclusionRouteSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer { public static final int TYPE = 33; private static final int HEADER_LENGTH = 2; private final XROSubobjectRegistry registry; public EROExplicitExclusionRouteSubobjectParser(final XROSubobjectRegistry registry) { this.registry = registry; } @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."); final SubobjectBuilder builder = new SubobjectBuilder(); builder.setLoose(loose); final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> list = parseSubobject( buffer); final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.exrs.Exrs> exrss = Lists .newArrayList(); for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject s : list) { final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.exrs.ExrsBuilder b = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.exrs.ExrsBuilder(); b.setAttribute(s.getAttribute()); b.setMandatory(s.isMandatory()); b.setSubobjectType(s.getSubobjectType()); exrss.add(b.build()); } builder.setSubobjectType(new ExrsCaseBuilder().setExrs(new ExrsBuilder().setExrs(exrss).build()).build()); return builder.build(); } @Override public void serializeSubobject(final Subobject subobject, final ByteBuf buffer) { Preconditions.checkArgument(subobject.getSubobjectType() instanceof ExrsCase, "Unknown subobject instance. Passed %s. Needed Exrs.", subobject.getSubobjectType().getClass()); final Exrs e = ((ExrsCase) subobject.getSubobjectType()).getExrs(); final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> list = new ArrayList<>(); for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev150820.explicit.route.subobjects.subobject.type.exrs._case.exrs.Exrs ex : e .getExrs()) { final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder b = new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder(); b.setAttribute(ex.getAttribute()); b.setMandatory(ex.isMandatory()); b.setSubobjectType(ex.getSubobjectType()); list.add(b.build()); } final ByteBuf body = Unpooled.buffer(); serializeSubobject(list, body); EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), body, buffer); } private List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> parseSubobject( final ByteBuf buffer) throws PCEPDeserializerException { Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty."); final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> subs = new ArrayList<>(); while (buffer.isReadable()) { final boolean mandatory = ((buffer.getByte(buffer.readerIndex()) & (1 << Values.FIRST_BIT_OFFSET)) != 0) ? true : false; final int type = (buffer.readUnsignedByte() & Values.BYTE_MAX_VALUE_BYTES) & ~(1 << Values.FIRST_BIT_OFFSET); final int length = buffer.readUnsignedByte() - HEADER_LENGTH; if (length > buffer.readableBytes()) { throw new PCEPDeserializerException( "Wrong length specified. Passed: " + length + "; Expected: <= " + buffer.readableBytes()); } subs.add(this.registry.parseSubobject(type, buffer.readSlice(length), mandatory)); } return subs; } private void serializeSubobject( final List<org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject> subobjects, final ByteBuf body) { for (final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject subobject : subobjects) { this.registry.serializeSubobject(subobject, body); } } }