sli/provider/src/main/java/org/openecomp/sdnc/sli/provider/SetNodeExecutor.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * openECOMP : SDN-C
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights
   6  *                                              reserved.
   7  * ================================================================================
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.openecomp.sdnc.sli.provider;
  23
  24 import java.util.HashMap;
  25 import java.util.Iterator;
  26 import java.util.LinkedList;
  27 import java.util.Map;
  28 import java.util.Set;
  29
  30 import org.openecomp.sdnc.sli.SvcLogicContext;
  31 import org.openecomp.sdnc.sli.SvcLogicException;
  32 import org.openecomp.sdnc.sli.SvcLogicExpression;
  33 import org.openecomp.sdnc.sli.SvcLogicExpressionFactory;
  34 import org.openecomp.sdnc.sli.SvcLogicNode;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 public class SetNodeExecutor extends SvcLogicNodeExecutor {
  39
  40         private static final Logger LOG = LoggerFactory
  41                         .getLogger(SetNodeExecutor.class);
  42
  43         @Override
  44         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  45                         SvcLogicContext ctx) throws SvcLogicException {
  46
  47                 String ifunsetStr = SvcLogicExpressionResolver.evaluate(
  48                                 node.getAttribute("only-if-unset"), node, ctx);
  49
  50                 boolean ifunset = "true".equalsIgnoreCase(ifunsetStr);
  51
  52                 Set<Map.Entry<String, SvcLogicExpression>> parameterSet = node
  53                                 .getParameterSet();
  54
  55                 for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parameterSet
  56                                 .iterator(); iter.hasNext();) {
  57                         Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  58                         String curName = curEnt.getKey();
  59                         String lhsVarName = curName;
  60
  61                         // Resolve LHS of assignment (could contain index variables)
  62                         try {
  63                                 SvcLogicExpression lhsExpr = SvcLogicExpressionFactory.parse(curName);
  64                                 lhsVarName = SvcLogicExpressionResolver.resolveVariableName(lhsExpr, node, ctx);
  65                         } catch (Exception e) {
  66                                 LOG.warn("Caught exception trying to resolve variable name ("+curName+")", e);
  67                         }
  68
  69
  70                         boolean setValue = true;
  71
  72                         if (curName.endsWith(".")) {
  73
  74                                 // Copy subtree - value should be a variable name
  75                                 SvcLogicExpression curValue = curEnt.getValue();
  76
  77                                 if (curValue != null) {
  78                                         String rhsRoot = curValue.toString();
  79
  80                                         if ((rhsRoot != null) && (rhsRoot.length() > 0)) {
  81                                                 if (rhsRoot.endsWith(".")) {
  82                                                         rhsRoot = rhsRoot
  83                                                                         .substring(0, rhsRoot.length() - 1);
  84                                                 }
  85
  86
  87                                                 // SDNGC-2321 : rhsRoot is variable name, possibly with subscript(s) to be resolved
  88                                                 try {
  89                                                         SvcLogicExpression rhsExpr = SvcLogicExpressionFactory.parse(rhsRoot);
  90                                                         rhsRoot = SvcLogicExpressionResolver.resolveVariableName(rhsExpr, node, ctx);
  91                                                 } catch (Exception e) {
  92                                                         LOG.warn("Caught exception trying to resolve variable name ("+rhsRoot+")", e);
  93                                                 }
  94
  95                                                 // See if the parameters are reversed (copying service-data to input) .. this
  96                                                 // was done as a workaround to earlier issue
  97                                                 if (curName.endsWith("-input.") && rhsRoot.startsWith("service-data")) {
  98                                                         LOG.warn("Arguments appear to be reversed .. will copy input to service-data instead");
  99                                                         lhsVarName = rhsRoot + ".";
 100                                                         rhsRoot = curName.substring(0, curName.length()-1);
 101                                                 }
 102
 103                                                 rhsRoot = rhsRoot + ".";
 104                                                 String lhsPrefix = lhsVarName;
 105
 106                                                 if (lhsPrefix.endsWith(".")) {
 107                                                         lhsPrefix = lhsPrefix.substring(0,
 108                                                                 lhsPrefix.length()-1);
 109                                                 }
 110                                                 int lhsPfxLength = lhsPrefix.length();
 111                                                 HashMap<String, String> parmsToAdd = new HashMap<String,String>();
 112
 113                                                 for (String sourceVarName : ctx.getAttributeKeySet()) {
 114
 115                                                         if (sourceVarName.startsWith(rhsRoot)) {
 116
 117                                                                 String targetVar = lhsPrefix
 118                                                                                 + "."
 119                                                                                 + sourceVarName
 120                                                                                                 .substring(rhsRoot.length());
 121
 122                                                                 LOG.debug("Copying " + sourceVarName
 123                                                                                 + " value to " + targetVar);
 124
 125                                                                 parmsToAdd.put(targetVar,
 126                                                                                 ctx.getAttribute(sourceVarName));
 127                                                         }
 128                                                 }
 129
 130                                                 for (String newParmName : parmsToAdd.keySet()) {
 131                                                         ctx.setAttribute(newParmName, parmsToAdd.get(newParmName));
 132                                                 }
 133
 134                                         } else {
 135                                                 // If RHS is empty, unset attributes in LHS
 136                                                 String lhsPrefix = lhsVarName.substring(0,
 137                                                                 lhsVarName.length() - 1);
 138                                                 int lhsPfxLength = lhsPrefix.length();
 139
 140                                                 LinkedList<String> parmsToRemove = new LinkedList<String> ();
 141
 142                                                 for (String curCtxVarname : ctx.getAttributeKeySet()) {
 143
 144                                                         if (curCtxVarname.startsWith(lhsPrefix)) {
 145                                                                 LOG.debug("Unsetting " + curCtxVarname);
 146                                                                 parmsToRemove.add(curCtxVarname);
 147                                                         }
 148                                                 }
 149
 150                                                 for (String parmName : parmsToRemove) {
 151                                                         ctx.setAttribute(parmName, null);
 152                                                 }
 153
 154                                         }
 155                                 }
 156
 157                         } else {
 158
 159                                 if (ifunset) {
 160                                         String ctxValue = ctx.getAttribute(lhsVarName);
 161
 162                                         if ((ctxValue != null) && (ctxValue.length() > 0)) {
 163                                                 setValue = false;
 164                                                 LOG.debug("Attribute "
 165                                                                 + lhsVarName
 166                                                                 + " already set and only-if-unset is true, so not overriding");
 167                                         }
 168                                 }
 169
 170                                 if (setValue) {
 171                                         String curValue = SvcLogicExpressionResolver.evaluate(
 172                                                         curEnt.getValue(), node, ctx);
 173
 174                                         if (LOG.isDebugEnabled()) {
 175                                                 LOG.trace("Parameter value "
 176                                                                 + curEnt.getValue().asParsedExpr()
 177                                                                 + " resolves to " + curValue);
 178                                                 LOG.debug("Setting context attribute " + lhsVarName
 179                                                                 + " to " + curValue);
 180                                         }
 181                                         ctx.setAttribute(lhsVarName, curValue);
 182                                 }
 183                         }
 184                 }
 185
 186                 return null;
 187         }
 188
 189 }