BUG-1275: drop a marker for follow-up

[controller.git] / opendaylight / md-sal / sal-rest-connector / src / main / java / org / opendaylight / controller / sal / rest / impl / RestUtil.java

diff --git a/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/RestUtil.java b/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/RestUtil.java
index 6e70b9bddf887cee1fd26b69abdafa6b15084843..cd263d3c55b0a56ce40feca32690749bd489ed6e 100644 (file)
--- a/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/RestUtil.java
+++ b/opendaylight/md-sal/sal-rest-connector/src/main/java/org/opendaylight/controller/sal/rest/impl/RestUtil.java
@@ -1,10 +1,33 @@
+/*
+ * 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.controller.sal.rest.impl;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.xml.stream.events.StartElement;
+
+import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO;
+import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO.IdentityValue;
+import org.opendaylight.controller.sal.restconf.impl.IdentityValuesDTO.Predicate;
 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
 
 public final class RestUtil {
 
-    public final static TypeDefinition<?> resolveBaseTypeFrom(TypeDefinition<?> type) {
+    // FIXME: BUG-1275: this is code duplicates data.impl.codec
+
+    public static final String SQUOTE = "'";
+    public static final String DQUOTE = "\"";
+    private static final Pattern PREDICATE_PATTERN = Pattern.compile("\\[(.*?)\\]");
+
+    public final static TypeDefinition<?> resolveBaseTypeFrom(final TypeDefinition<?> type) {
         TypeDefinition<?> superType = type;
         while (superType.getBaseType() != null) {
             superType = superType.getBaseType();
@@ -12,4 +35,121 @@ public final class RestUtil {
         return superType;
     }
 
+    public static IdentityValuesDTO asInstanceIdentifier(final String value, final PrefixesMaping prefixMap) {
+        String valueTrimmed = value.trim();
+        if (!valueTrimmed.startsWith("/")) {
+            return null;
+        }
+        String[] xPathParts = valueTrimmed.split("/");
+        if (xPathParts.length < 2) { // must be at least "/pr:node"
+            return null;
+        }
+        IdentityValuesDTO identityValuesDTO = new IdentityValuesDTO(value);
+        for (int i = 1; i < xPathParts.length; i++) {
+            String xPathPartTrimmed = xPathParts[i].trim();
+
+            String xPathPartStr = getIdAndPrefixAsStr(xPathPartTrimmed);
+            IdentityValue identityValue = toIdentity(xPathPartStr, prefixMap);
+            if (identityValue == null) {
+                return null;
+            }
+
+            List<Predicate> predicates = toPredicates(xPathPartTrimmed, prefixMap);
+            if (predicates == null) {
+                return null;
+            }
+            identityValue.setPredicates(predicates);
+
+            identityValuesDTO.add(identityValue);
+        }
+        return identityValuesDTO.getValuesWithNamespaces().isEmpty() ? null : identityValuesDTO;
+    }
+
+    private static String getIdAndPrefixAsStr(final String pathPart) {
+        int predicateStartIndex = pathPart.indexOf("[");
+        return predicateStartIndex == -1 ? pathPart : pathPart.substring(0, predicateStartIndex);
+    }
+
+    private static IdentityValue toIdentity(final String xPathPart, final PrefixesMaping prefixMap) {
+        String xPathPartTrimmed = xPathPart.trim();
+        if (xPathPartTrimmed.isEmpty()) {
+            return null;
+        }
+        String[] prefixAndIdentifier = xPathPartTrimmed.split(":");
+        // it is not "prefix:value"
+        if (prefixAndIdentifier.length != 2) {
+            return null;
+        }
+        String prefix = prefixAndIdentifier[0].trim();
+        String identifier = prefixAndIdentifier[1].trim();
+        if (prefix.isEmpty() || identifier.isEmpty()) {
+            return null;
+        }
+        String namespace = prefixMap.getNamespace(prefix);
+        return new IdentityValue(namespace, identifier, namespace.equals(prefix) ? null : prefix);
+    }
+
+    private static List<Predicate> toPredicates(final String predicatesStr, final PrefixesMaping prefixMap) {
+        List<Predicate> result = new ArrayList<>();
+        List<String> predicates = new ArrayList<>();
+        Matcher matcher = PREDICATE_PATTERN.matcher(predicatesStr);
+        while (matcher.find()) {
+            predicates.add(matcher.group(1).trim());
+        }
+        for (String predicate : predicates) {
+            int indexOfEqualityMark = predicate.indexOf("=");
+            if (indexOfEqualityMark != -1) {
+                String predicateValue = toPredicateValue(predicate.substring(indexOfEqualityMark + 1));
+                if (predicate.startsWith(".")) { // it is leaf-list
+                    if (predicateValue == null) {
+                        return null;
+                    }
+                    result.add(new Predicate(null, predicateValue));
+                } else {
+                    IdentityValue identityValue = toIdentity(predicate.substring(0, indexOfEqualityMark),
+                            prefixMap);
+                    if (identityValue == null || predicateValue == null) {
+                        return null;
+                    }
+                    result.add(new Predicate(identityValue, predicateValue));
+                }
+            }
+        }
+        return result;
+    }
+
+    private static String toPredicateValue(final String predicatedValue) {
+        String predicatedValueTrimmed = predicatedValue.trim();
+        if ((predicatedValueTrimmed.startsWith(DQUOTE) || predicatedValueTrimmed.startsWith(SQUOTE))
+                && (predicatedValueTrimmed.endsWith(DQUOTE) || predicatedValueTrimmed.endsWith(SQUOTE))) {
+            return predicatedValueTrimmed.substring(1, predicatedValueTrimmed.length() - 1);
+        }
+        return null;
+    }
+
+    public interface PrefixesMaping {
+        public String getNamespace(String prefix);
+    }
+
+    public static class PrefixMapingFromXml implements PrefixesMaping {
+        StartElement startElement = null;
+
+        public PrefixMapingFromXml(final StartElement startElement) {
+            this.startElement = startElement;
+        }
+
+        @Override
+        public String getNamespace(final String prefix) {
+            return startElement.getNamespaceContext().getNamespaceURI(prefix);
+        }
+    }
+
+    public static class PrefixMapingFromJson implements PrefixesMaping {
+
+        @Override
+        public String getNamespace(final String prefix) {
+            return prefix;
+        }
+    }
+
 }