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ATLAS-1825: updated import to support optional transformation of attr…
…ibute values Signed-off-by: Madhan Neethiraj <[email protected]>
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repository/src/main/java/org/apache/atlas/repository/impexp/ImportTransformer.java
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| /** | ||
| * 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; | ||
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| import org.apache.atlas.AtlasErrorCode; | ||
| import org.apache.atlas.exception.AtlasBaseException; | ||
| import org.apache.commons.lang.StringUtils; | ||
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| public abstract class ImportTransformer { | ||
| private static final String TRANSFORMER_PARAMETER_SEPARATOR = "\\:"; | ||
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| private final String transformType; | ||
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| 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]; | ||
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| final ImportTransformer ret; | ||
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| 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]; | ||
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| 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); | ||
| } | ||
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| return ret; | ||
| } | ||
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| public String getTransformType() { return transformType; } | ||
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| public abstract Object apply(Object o) throws AtlasBaseException; | ||
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| protected ImportTransformer(String transformType) { | ||
| this.transformType = transformType; | ||
| } | ||
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| static class Replace extends ImportTransformer { | ||
| private final String toFindStr; | ||
| private final String replaceStr; | ||
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| public Replace(String toFindStr, String replaceStr) { | ||
| super("replace"); | ||
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| this.toFindStr = toFindStr; | ||
| this.replaceStr = replaceStr; | ||
| } | ||
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| public String getToFindStr() { return toFindStr; } | ||
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| public String getReplaceStr() { return replaceStr; } | ||
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| @Override | ||
| public Object apply(Object o) throws AtlasBaseException { | ||
| Object ret = o; | ||
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| if(o instanceof String) { | ||
| ret = StringUtils.replace((String) o, toFindStr, replaceStr); | ||
| } | ||
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| return ret; | ||
| } | ||
| } | ||
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| static class Lowercase extends ImportTransformer { | ||
| public Lowercase() { | ||
| super("lowercase"); | ||
| } | ||
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| @Override | ||
| public Object apply(Object o) { | ||
| Object ret = o; | ||
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| if(o instanceof String) { | ||
| ret = StringUtils.lowerCase((String) o); | ||
| } | ||
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| return ret; | ||
| } | ||
| } | ||
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| static class Uppercase extends ImportTransformer { | ||
| public Uppercase() { | ||
| super("uppercase"); | ||
| } | ||
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| @Override | ||
| public Object apply(Object o) { | ||
| Object ret = o; | ||
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| if(o instanceof String) { | ||
| ret = StringUtils.upperCase((String) o); | ||
| } | ||
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| return ret; | ||
| } | ||
| } | ||
| } |
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