hostsharing/hs.hsadmin.ng
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Code Pull Requests 2 Activity

fixing issues from code-review

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Michael Hoennig 2024-04-02 13:23:18 +02:00
parent 97c67d8f97
commit 9b8d231284
2 changed files with 0 additions and 59 deletions
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1
build.gradle
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@ -62,7 +62,6 @@ dependencies {
implementation 'org.springdoc:springdoc-openapi:2.4.0'
implementation 'org.postgresql:postgresql:42.7.3'
implementation 'org.liquibase:liquibase-core:4.27.0'
//implementation 'com.vladmihalcea:hibernate-types-60:2.21.1'
implementation 'io.hypersistence:hypersistence-utils-hibernate-63:3.7.3'
implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.17.0'
implementation 'org.openapitools:jackson-databind-nullable:0.2.6'

58
src/main/java/net/hostsharing/hsadminng/mapper/PostgresArray.java
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@ -1,58 +0,0 @@
package net.hostsharing.hsadminng.mapper;
import lombok.experimental.UtilityClass;
import org.postgresql.util.PGtokenizer;
import java.lang.reflect.Array;
import java.nio.charset.StandardCharsets;
import java.util.function.Function;
@UtilityClass
public class PostgresArray {
/**
* Converts a byte[], as returned for a Postgres-array by native queries, to a Java array.
*
* <p>This example code worked with Hibernate 5 (Spring Boot 3.0.x):
* <pre><code>
* return (UUID[]) em.createNativeQuery("select currentSubjectsUuids() as uuids", UUID[].class).getSingleResult();
* </code></pre>
* </p>
*
* <p>With Hibernate 6 (Spring Boot 3.1.x), this utility method can be used like such:
* <pre><code>
* final byte[] result = (byte[]) em.createNativeQuery("select * from currentSubjectsUuids() as uuids", UUID[].class)
* .getSingleResult();
* return fromPostgresArray(result, UUID.class, UUID::fromString);
* </code></pre>
* </p>
*
* @param pgArray the byte[] returned by a native query containing as rendered for a Postgres array
* @param elementClass the class of a single element of the Java array to be returned
* @param itemParser converts a string element to the specified elementClass
* @return a Java array containing the data from pgArray
* @param <T> type of a single element of the Java array
*/
public static <T> T[] fromPostgresArray(final byte[] pgArray, final Class<T> elementClass, final Function<String, T> itemParser) {
final var pgArrayLiteral = new String(pgArray, StandardCharsets.UTF_8);
if (pgArrayLiteral.length() == 2) {
return newGenericArray(elementClass, 0);
}
final PGtokenizer tokenizer = new PGtokenizer(pgArrayLiteral.substring(1, pgArrayLiteral.length()-1), ',');
tokenizer.remove("\"", "\"");
final T[] array = newGenericArray(elementClass, tokenizer.getSize()); // Create a new array of the specified type and length
for ( int n = 0; n < tokenizer.getSize(); ++n ) {
final String token = tokenizer.getToken(n);
if ( !"NULL".equals(token) ) {
array[n] = itemParser.apply(token.trim().replace("\\\"", "\""));
}
}
return array;
}
@SuppressWarnings("unchecked")
private static <T> T[] newGenericArray(final Class<T> elementClass, final int length) {
return (T[]) Array.newInstance(elementClass, length);
}
}