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.io.IOException;
  25 import java.util.HashMap;
  26 import java.util.Iterator;
  27 import java.util.LinkedList;
  28 import java.util.Map;
  29 import java.util.Set;
  30
  31 import org.openecomp.sdnc.sli.SvcLogicContext;
  32 import org.openecomp.sdnc.sli.SvcLogicException;
  33 import org.openecomp.sdnc.sli.SvcLogicExpression;
  34 import org.openecomp.sdnc.sli.SvcLogicExpressionFactory;
  35 import org.openecomp.sdnc.sli.SvcLogicNode;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 public class SetNodeExecutor extends SvcLogicNodeExecutor {
  40
  41         private static final Logger LOG = LoggerFactory
  42                         .getLogger(SetNodeExecutor.class);
  43
  44         @Override
  45         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  46                         SvcLogicContext ctx) throws SvcLogicException {
  47
  48                 String ifunsetStr = SvcLogicExpressionResolver.evaluate(
  49                                 node.getAttribute("only-if-unset"), node, ctx);
  50
  51                 boolean ifunset = "true".equalsIgnoreCase(ifunsetStr);
  52
  53                 Set<Map.Entry<String, SvcLogicExpression>> parameterSet = node
  54                                 .getParameterSet();
  55
  56                 for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parameterSet
  57                                 .iterator(); iter.hasNext();) {
  58                         Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  59                         String curName = curEnt.getKey();
  60                         String lhsVarName = curName;
  61
  62                         // Resolve LHS of assignment (could contain index variables)
  63                         try {
  64                                 SvcLogicExpression lhsExpr = SvcLogicExpressionFactory.parse(curName);
  65                                 lhsVarName = SvcLogicExpressionResolver.resolveVariableName(lhsExpr, node, ctx);
  66                         } catch (Exception e) {
  67                                 LOG.warn("Caught exception trying to resolve variable name ("+curName+")", e);
  68                         }
  69
  70
  71                         boolean setValue = true;
  72
  73                         if (curName.endsWith(".")) {
  74
  75                                 // Copy subtree - value should be a variable name
  76                                 SvcLogicExpression curValue = curEnt.getValue();
  77
  78                                 if (curValue != null) {
  79                                         String rhsRoot = curValue.toString();
  80
  81                                         if ((rhsRoot != null) && (rhsRoot.length() > 0)) {
  82                                                 if (rhsRoot.endsWith(".")) {
  83                                                         rhsRoot = rhsRoot
  84                                                                         .substring(0, rhsRoot.length() - 1);
  85                                                 }
  86
  87
  88                                                 // SDNGC-2321 : rhsRoot is variable name, possibly with subscript(s) to be resolved
  89                                                 try {
  90                                                         SvcLogicExpression rhsExpr = SvcLogicExpressionFactory.parse(rhsRoot);
  91                                                         rhsRoot = SvcLogicExpressionResolver.resolveVariableName(rhsExpr, node, ctx);
  92                                                 } catch (Exception e) {
  93                                                         LOG.warn("Caught exception trying to resolve variable name ("+rhsRoot+")", e);
  94                                                 }
  95
  96                                                 // See if the parameters are reversed (copying service-data to input) .. this
  97                                                 // was done as a workaround to earlier issue
  98                                                 if (curName.endsWith("-input.") && rhsRoot.startsWith("service-data")) {
  99                                                         LOG.warn("Arguments appear to be reversed .. will copy input to service-data instead");
 100                                                         lhsVarName = rhsRoot + ".";
 101                                                         rhsRoot = curName.substring(0, curName.length()-1);
 102                                                 }
 103
 104                                                 rhsRoot = rhsRoot + ".";
 105                                                 String lhsPrefix = lhsVarName;
 106
 107                                                 if (lhsPrefix.endsWith(".")) {
 108                                                         lhsPrefix = lhsPrefix.substring(0,
 109                                                                 lhsPrefix.length()-1);
 110                                                 }
 111                                                 int lhsPfxLength = lhsPrefix.length();
 112                                                 HashMap<String, String> parmsToAdd = new HashMap<String,String>();
 113
 114                                                 for (String sourceVarName : ctx.getAttributeKeySet()) {
 115
 116                                                         if (sourceVarName.startsWith(rhsRoot)) {
 117
 118                                                                 String targetVar = lhsPrefix
 119                                                                                 + "."
 120                                                                                 + sourceVarName
 121                                                                                                 .substring(rhsRoot.length());
 122
 123                                                                 LOG.debug("Copying " + sourceVarName
 124                                                                                 + " value to " + targetVar);
 125
 126                                                                 parmsToAdd.put(targetVar,
 127                                                                                 ctx.getAttribute(sourceVarName));
 128                                                         }
 129                                                 }
 130
 131                                                 for (String newParmName : parmsToAdd.keySet()) {
 132                                                         ctx.setAttribute(newParmName, parmsToAdd.get(newParmName));
 133                                                 }
 134
 135                                         } else {
 136                                                 // If RHS is empty, unset attributes in LHS
 137                                                 String lhsPrefix = lhsVarName.substring(0,
 138                                                                 lhsVarName.length() - 1);
 139                                                 int lhsPfxLength = lhsPrefix.length();
 140
 141                                                 LinkedList<String> parmsToRemove = new LinkedList<String> ();
 142
 143                                                 for (String curCtxVarname : ctx.getAttributeKeySet()) {
 144
 145                                                         if (curCtxVarname.startsWith(lhsPrefix)) {
 146                                                                 LOG.debug("Unsetting " + curCtxVarname);
 147                                                                 parmsToRemove.add(curCtxVarname);
 148                                                         }
 149                                                 }
 150
 151                                                 for (String parmName : parmsToRemove) {
 152                                                         ctx.setAttribute(parmName, null);
 153                                                 }
 154
 155                                         }
 156                                 }
 157
 158                         } else {
 159
 160                                 if (ifunset) {
 161                                         String ctxValue = ctx.getAttribute(lhsVarName);
 162
 163                                         if ((ctxValue != null) && (ctxValue.length() > 0)) {
 164                                                 setValue = false;
 165                                                 LOG.debug("Attribute "
 166                                                                 + lhsVarName
 167                                                                 + " already set and only-if-unset is true, so not overriding");
 168                                         }
 169                                 }
 170
 171                                 if (setValue) {
 172                                         String curValue = SvcLogicExpressionResolver.evaluate(
 173                                                         curEnt.getValue(), node, ctx);
 174
 175                                         if (LOG.isDebugEnabled()) {
 176                                                 LOG.trace("Parameter value "
 177                                                                 + curEnt.getValue().asParsedExpr()
 178                                                                 + " resolves to " + curValue);
 179                                                 LOG.debug("Setting context attribute " + lhsVarName
 180                                                                 + " to " + curValue);
 181                                         }
 182                                         ctx.setAttribute(lhsVarName, curValue);
 183                                 }
 184                         }
 185                 }
 186
 187                 return null;
 188         }
 189
 190 }