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[SPARK-23901][SQL] Add masking functions #21246
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[SPARK-23901][SQL] Add masking functions
mgaido91 b15bbf1
fix scalastyle
mgaido91 5def290
Merge branch 'master' of github.com:apache/spark into SPARK-23901
mgaido91 e9da798
address review comments
mgaido91 3edd243
Merge branch 'master' of github.com:apache/spark into SPARK-23901
mgaido91 ae89d00
support non-ascii chars
mgaido91 06b8b6c
address comments
mgaido91 a1f3a5b
address comments
mgaido91 ca9caa0
throw exception instead of ignoring non-literals input
mgaido91 fca3af8
Merge branch 'master' of github.com:apache/spark into SPARK-23901
mgaido91 6fd8f2f
fix javastyle
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80 changes: 80 additions & 0 deletions
80
...atalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/MaskExpressionsUtils.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. | ||
*/ | ||
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package org.apache.spark.sql.catalyst.expressions; | ||
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/** | ||
* Contains all the Utils methods used in the masking expressions. | ||
*/ | ||
public class MaskExpressionsUtils { | ||
static final int UNMASKED_VAL = -1; | ||
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/** | ||
* Returns the masking character for {@param c} or {@param c} is it should not be masked. | ||
* @param c the character to transform | ||
* @param maskedUpperChar the character to use instead of a uppercase letter | ||
* @param maskedLowerChar the character to use instead of a lowercase letter | ||
* @param maskedDigitChar the character to use instead of a digit | ||
* @param maskedOtherChar the character to use instead of a any other character | ||
* @return masking character for {@param c} | ||
*/ | ||
public static int transformChar( | ||
final int c, | ||
int maskedUpperChar, | ||
int maskedLowerChar, | ||
int maskedDigitChar, | ||
int maskedOtherChar) { | ||
switch(Character.getType(c)) { | ||
case Character.UPPERCASE_LETTER: | ||
if(maskedUpperChar != UNMASKED_VAL) { | ||
return maskedUpperChar; | ||
} | ||
break; | ||
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case Character.LOWERCASE_LETTER: | ||
if(maskedLowerChar != UNMASKED_VAL) { | ||
return maskedLowerChar; | ||
} | ||
break; | ||
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case Character.DECIMAL_DIGIT_NUMBER: | ||
if(maskedDigitChar != UNMASKED_VAL) { | ||
return maskedDigitChar; | ||
} | ||
break; | ||
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default: | ||
if(maskedOtherChar != UNMASKED_VAL) { | ||
return maskedOtherChar; | ||
} | ||
break; | ||
} | ||
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return c; | ||
} | ||
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/** | ||
* Returns the replacement char to use according to the {@param rep} specified by the user and | ||
* the {@param def} default. | ||
*/ | ||
public static int getReplacementChar(String rep, int def) { | ||
if (rep != null && rep.length() > 0) { | ||
return rep.codePointAt(0); | ||
} | ||
return def; | ||
} | ||
} |
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Why is this implemented in Java?
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Because I am invoking also in the Java code generated and I wanted to avoid using the match clause (instead of the switch java operation) for performance reasons.
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I see, thanks!