| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.atlas.repository.graph; |
| |
| /** |
| * Represents an edge label used in Atlas. |
| * The format of an Atlas edge label is EDGE_LABEL_PREFIX<<typeName>>.<<attributeName>>[.mapKey] |
| * |
| */ |
| public class AtlasEdgeLabel { |
| private final String typeName_; |
| private final String attributeName_; |
| private final String mapKey_; |
| private final String edgeLabel_; |
| private final String qualifiedMapKey_; |
| private final String qualifiedAttributeName_; |
| |
| public AtlasEdgeLabel(String edgeLabel) { |
| String labelWithoutPrefix = edgeLabel.substring(GraphHelper.EDGE_LABEL_PREFIX.length()); |
| String[] fields = labelWithoutPrefix.split("\\.", 3); |
| if (fields.length < 2 || fields.length > 3) { |
| throw new IllegalArgumentException("Invalid edge label " + edgeLabel + |
| ": expected 2 or 3 label components but found " + fields.length); |
| } |
| typeName_ = fields[0]; |
| attributeName_ = fields[1]; |
| if (fields.length == 3) { |
| mapKey_ = fields[2]; |
| qualifiedMapKey_ = labelWithoutPrefix; |
| qualifiedAttributeName_ = typeName_ + '.' + attributeName_; |
| } |
| else { |
| mapKey_ = null; |
| qualifiedMapKey_ = null; |
| qualifiedAttributeName_ = labelWithoutPrefix; |
| } |
| edgeLabel_ = edgeLabel; |
| } |
| |
| public String getTypeName() { |
| return typeName_; |
| } |
| |
| public String getAttributeName() { |
| return attributeName_; |
| } |
| |
| public String getMapKey() { |
| return mapKey_; |
| } |
| |
| public String getEdgeLabel() { |
| return edgeLabel_; |
| } |
| |
| public String getQualifiedMapKey() { |
| return qualifiedMapKey_; |
| } |
| |
| |
| public String getQualifiedAttributeName() { |
| |
| return qualifiedAttributeName_; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append('(').append("typeName: ").append(typeName_); |
| sb.append(", attributeName: ").append(attributeName_); |
| if (mapKey_ != null) { |
| sb.append(", mapKey: ").append(mapKey_); |
| sb.append(", qualifiedMapKey: ").append(qualifiedMapKey_); |
| } |
| sb.append(", edgeLabel: ").append(edgeLabel_).append(')'); |
| return sb.toString(); |
| } |
| |
| } |