Java tutorial
/* * 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.groupbasedpolicy.renderer.opflex.mit; import java.math.BigInteger; import java.util.ArrayList; import java.util.List; import org.opendaylight.groupbasedpolicy.renderer.opflex.lib.messages.ManagedObject; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Uri; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.fasterxml.jackson.databind.DeserializationFeature; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.annotation.JsonSerialize; import com.fasterxml.jackson.databind.node.ArrayNode; import com.fasterxml.jackson.databind.node.JsonNodeFactory; import com.fasterxml.jackson.databind.node.ObjectNode; public class MitLib { protected static final Logger LOG = LoggerFactory.getLogger(MitLib.class); private ObjectMapper objectMapper; private JsonNodeFactory jnf; @JsonSerialize public static class Reference { String subject; String reference_uri; public String getSubject() { return subject; } public void setSubject(String subject) { this.subject = subject; } public String getReference_uri() { return reference_uri; } public void setReference_uri(String reference_uri) { this.reference_uri = reference_uri; } } public MitLib() { objectMapper = new ObjectMapper(); objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); jnf = objectMapper.getNodeFactory(); } public static final String REFERENCE_SUBJECT = "subject"; public static final String REFERENCE_URI = "reference_uri"; public BigInteger deserializeMoPropertyEnum(JsonNode node, PolicyPropertyInfo ppi) { EnumInfo ei = ppi.getEnumInfo(); return ei.getEnumValue(node.asText()); } public String serializeMoPropertyEnum(PolicyPropertyInfo ppi, PolicyObjectInstance poi) { EnumInfo ei = ppi.getEnumInfo(); return ei.getEnumValue(poi.getUint64(ppi.getPropId())); } /** * Deserialize a REFERENCE property * * @param node * @return */ public PolicyObjectInstance.PolicyReference deserializeMoPropertyRef(JsonNode node, OpflexMit mit) { JsonNode sn = node.findValue(REFERENCE_SUBJECT); if (sn == null) return null; JsonNode un = node.findValue(REFERENCE_URI); if (un == null) return null; PolicyClassInfo pci = mit.getClass(sn.asText()); if (pci == null) return null; return new PolicyObjectInstance.PolicyReference(pci.getClassId(), new Uri(un.asText())); } /** * Serialize a REFERENCE property * * @param reference * @param mit * @return */ public ObjectNode serializeMoPropertyRef(PolicyObjectInstance.PolicyReference reference, OpflexMit mit) { ObjectNode on = jnf.objectNode(); PolicyClassInfo pci = mit.getClass(reference.getClassId()); if (pci == null) return null; PolicyUri puri = new PolicyUri(reference.getUri().getValue()); // walk our way up until we find a valid class String identifier = puri.pop(); while (mit.getClass(identifier) == null) { identifier = puri.pop(); } on.put(REFERENCE_SUBJECT, identifier); on.put(REFERENCE_URI, reference.getUri().getValue()); return on; } /** * Take the {@link ManagedObject} and deserialize the properties * into a concrete type to be used by the renderer. It also * adds URIs for any children that are referenced in the * properties to the MO's "children" array. * * @param mo */ public PolicyObjectInstance deserializeMoProperties(ManagedObject mo, OpflexMit mit) { /* * The subject gives us the class to use for the schema */ PolicyClassInfo pci = mit.getClass(mo.getSubject()); // sanity checks if (pci == null) return null; PolicyObjectInstance poi = new PolicyObjectInstance(pci.getClassId()); if (mo.getProperties() == null) return poi; for (ManagedObject.Property prop : mo.getProperties()) { PolicyPropertyInfo ppi = pci.getProperty(prop.getName()); if ((ppi == null) || (prop.getData() == null)) continue; JsonNode node = prop.getData(); boolean vectored = false; if (ppi.getPropCardinality().equals(PolicyPropertyInfo.PropertyCardinality.VECTOR)) { vectored = true; } switch (ppi.getType()) { case STRING: if (vectored == true) { if (!node.isArray()) continue; List<String> sl = new ArrayList<String>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); if (!jn.isTextual()) continue; sl.add(jn.asText()); } poi.setString(ppi.getPropId(), sl); } else { if (!node.isTextual()) continue; poi.setString(ppi.getPropId(), node.asText()); } break; case U64: if (vectored == true) { if (!node.isArray()) continue; List<BigInteger> bil = new ArrayList<BigInteger>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); if (!jn.isBigInteger()) continue; bil.add(new BigInteger(jn.asText())); } poi.setUint64(ppi.getPropId(), bil); } else { if (!node.isBigInteger()) continue; poi.setUint64(ppi.getPropId(), new BigInteger(node.asText())); } break; case S64: if (vectored == true) { if (!node.isArray()) continue; List<Long> ll = new ArrayList<Long>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); if (!jn.isBigInteger()) continue; ll.add(jn.asLong()); } poi.setInt64(ppi.getPropId(), ll); } else { if (!node.isBigInteger()) continue; poi.setInt64(ppi.getPropId(), node.asLong()); } break; case REFERENCE: if (vectored == true) { if (!node.isArray()) continue; List<PolicyObjectInstance.PolicyReference> prl = new ArrayList<PolicyObjectInstance.PolicyReference>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); PolicyObjectInstance.PolicyReference pr = deserializeMoPropertyRef(jn, mit); if (pr == null) continue; prl.add(pr); } poi.setReference(ppi.getPropId(), prl); } else { PolicyObjectInstance.PolicyReference pr = deserializeMoPropertyRef(node, mit); if (pr == null) continue; poi.setReference(ppi.getPropId(), pr); } break; case ENUM8: case ENUM16: case ENUM32: case ENUM64: if (vectored == true) { if (!node.isArray()) continue; List<BigInteger> bil = new ArrayList<BigInteger>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); if (!jn.isTextual()) continue; BigInteger bi = deserializeMoPropertyEnum(node, ppi); bil.add(bi); } poi.setUint64(ppi.getPropId(), bil); } else { if (!node.isTextual()) continue; BigInteger bi = deserializeMoPropertyEnum(node, ppi); poi.setUint64(ppi.getPropId(), bi); } break; case MAC: if (vectored == true) { if (!node.isArray()) continue; List<MacAddress> ml = new ArrayList<MacAddress>(); for (int i = 0; i < node.size(); i++) { JsonNode jn = node.get(i); if (!jn.isTextual()) continue; ml.add(new MacAddress(jn.asText())); } poi.setMacAddress(ppi.getPropId(), ml); } else { if (!node.isTextual()) continue; poi.setMacAddress(ppi.getPropId(), new MacAddress(node.asText())); } break; case COMPOSITE: } } return poi; } /** * Serialize the properties contained in the {@link PolicyObjectInstance} * into the properties field of the {@link ManagedObject} * * @param pci * @param poi * @param mo * @param mit */ public void serializeMoProperties(PolicyClassInfo pci, PolicyObjectInstance poi, ManagedObject mo, OpflexMit mit) { List<PolicyPropertyInfo> ppil = pci.getProperties(); if (ppil == null) return; List<ManagedObject.Property> pl = new ArrayList<ManagedObject.Property>(); /* * For serialization of values, we can cheat a bit, * as the native "toString" method gives us exactly * the formatting we need (including vectors). */ for (PolicyPropertyInfo ppi : ppil) { /* * Skip any properties that aren't populated for this * object instance */ if (ppi.getType() != PolicyPropertyInfo.PropertyType.COMPOSITE && !poi.isSet(ppi.getPropId(), ppi.getType(), ppi.getPropCardinality())) { continue; } ManagedObject.Property p = null; boolean scalar = true; if (ppi.getPropCardinality() == PolicyPropertyInfo.PropertyCardinality.VECTOR) { scalar = false; } switch (ppi.getType()) { case STRING: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { JsonNode jn = jnf.textNode(poi.getString(ppi.getPropId())); p.setData(jn); } else { int len = poi.getStringSize(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { an.add(poi.getString(ppi.getPropId(), i)); } p.setData(an); } break; case S64: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { JsonNode jn = jnf.numberNode(poi.getInt64(ppi.getPropId())); p.setData(jn); } else { int len = poi.getInt64Size(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { an.add(Long.valueOf(poi.getInt64(ppi.getPropId(), i))); } p.setData(an); } break; case ENUM8: case ENUM16: case ENUM32: case ENUM64: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { JsonNode jn = jnf.textNode(serializeMoPropertyEnum(ppi, poi)); p.setData(jn); } else { int len = poi.getUint64Size(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { an.add(serializeMoPropertyEnum(ppi, poi)); } p.setData(an); } break; case U64: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { JsonNode jn = jnf.numberNode(poi.getUint64(ppi.getPropId())); p.setData(jn); } else { int len = poi.getUint64Size(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { an.numberNode(poi.getUint64(ppi.getPropId())); } p.setData(an); } break; case MAC: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { MacAddress mac = poi.getMacAddress(ppi.getPropId()); JsonNode jn = jnf.textNode(mac.getValue().toString()); p.setData(jn); } else { int len = poi.getMacAddressSize(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { MacAddress mac = poi.getMacAddress(ppi.getPropId()); an.add(mac.getValue().toString()); } p.setData(an); } break; case REFERENCE: p = new ManagedObject.Property(); p.setName(ppi.getPropName()); if (scalar == true) { ObjectNode on = serializeMoPropertyRef(poi.getReference(ppi.getPropId()), mit); p.setData(on); } else { int len = poi.getReferenceSize(ppi.getPropId()); ArrayNode an = jnf.arrayNode(); for (int i = 0; i < len; i++) { ObjectNode on = serializeMoPropertyRef(poi.getReference(ppi.getPropId(), i), mit); an.add(on); } p.setData(an); } break; case COMPOSITE: /* * Get the URI to add to the list of children */ break; default: } if (p != null) { pl.add(p); } } mo.setProperties(pl); } }