| /** |
| * 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.impexp; |
| |
| import org.apache.atlas.AtlasErrorCode; |
| import org.apache.atlas.exception.AtlasBaseException; |
| import org.apache.commons.lang.StringUtils; |
| |
| |
| public abstract class ImportTransformer { |
| private static final String TRANSFORMER_PARAMETER_SEPARATOR = "\\:"; |
| |
| private final String transformType; |
| |
| |
| public static ImportTransformer getTransformer(String transformerSpec) throws AtlasBaseException { |
| String[] params = StringUtils.split(transformerSpec, TRANSFORMER_PARAMETER_SEPARATOR); |
| String key = (params == null || params.length < 1) ? transformerSpec : params[0]; |
| |
| final ImportTransformer ret; |
| |
| if (StringUtils.isEmpty(key)) { |
| throw new AtlasBaseException(AtlasErrorCode.INVALID_VALUE, "Error creating ImportTransformer. Invalid transformer-specification: {}.", transformerSpec); |
| } else if (key.equals("replace")) { |
| String toFindStr = (params == null || params.length < 2) ? "" : params[1]; |
| String replaceStr = (params == null || params.length < 3) ? "" : params[2]; |
| |
| ret = new Replace(toFindStr, replaceStr); |
| } else if (key.equals("lowercase")) { |
| ret = new Lowercase(); |
| } else if (key.equals("uppercase")) { |
| ret = new Uppercase(); |
| } else { |
| throw new AtlasBaseException(AtlasErrorCode.INVALID_VALUE, "Error creating ImportTransformer. Unknown transformer: {}.", transformerSpec); |
| } |
| |
| return ret; |
| } |
| |
| public String getTransformType() { return transformType; } |
| |
| public abstract Object apply(Object o) throws AtlasBaseException; |
| |
| |
| protected ImportTransformer(String transformType) { |
| this.transformType = transformType; |
| } |
| |
| static class Replace extends ImportTransformer { |
| private final String toFindStr; |
| private final String replaceStr; |
| |
| public Replace(String toFindStr, String replaceStr) { |
| super("replace"); |
| |
| this.toFindStr = toFindStr; |
| this.replaceStr = replaceStr; |
| } |
| |
| public String getToFindStr() { return toFindStr; } |
| |
| public String getReplaceStr() { return replaceStr; } |
| |
| @Override |
| public Object apply(Object o) throws AtlasBaseException { |
| Object ret = o; |
| |
| if(o instanceof String) { |
| ret = StringUtils.replace((String) o, toFindStr, replaceStr); |
| } |
| |
| return ret; |
| } |
| } |
| |
| static class Lowercase extends ImportTransformer { |
| public Lowercase() { |
| super("lowercase"); |
| } |
| |
| @Override |
| public Object apply(Object o) { |
| Object ret = o; |
| |
| if(o instanceof String) { |
| ret = StringUtils.lowerCase((String) o); |
| } |
| |
| return ret; |
| } |
| } |
| |
| static class Uppercase extends ImportTransformer { |
| public Uppercase() { |
| super("uppercase"); |
| } |
| |
| @Override |
| public Object apply(Object o) { |
| Object ret = o; |
| |
| if(o instanceof String) { |
| ret = StringUtils.upperCase((String) o); |
| } |
| |
| return ret; |
| } |
| } |
| } |