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src/main/java/tools/jackson/databind/ext/sql/JavaSqlTypeHandlerFactory.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,123 @@ | ||
| package tools.jackson.databind.ext.sql; | ||
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| import tools.jackson.databind.*; | ||
| import tools.jackson.databind.ser.jdk.JavaUtilDateSerializer; | ||
| import tools.jackson.databind.util.ClassUtil; | ||
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| /** | ||
| * Helper class used for isolating details of handling optional+external types | ||
| * (java.sql classes) from standard factories that offer them. | ||
| */ | ||
| public class JavaSqlTypeHandlerFactory | ||
| { | ||
| public final static JavaSqlTypeHandlerFactory instance = new JavaSqlTypeHandlerFactory(); | ||
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| // classes from java.sql module, this module may or may not be present at runtime | ||
| // (is included on Java 8, but not part of JDK core for Java 9 and beyond) | ||
| private final Map<String, String> _sqlDeserializers; | ||
| private final Map<String, Object> _sqlSerializers; | ||
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| private final static String CLS_NAME_JAVA_SQL_TIMESTAMP = "java.sql.Timestamp"; | ||
| private final static String CLS_NAME_JAVA_SQL_DATE = "java.sql.Date"; | ||
| private final static String CLS_NAME_JAVA_SQL_TIME = "java.sql.Time"; | ||
| private final static String CLS_NAME_JAVA_SQL_BLOB = "java.sql.Blob"; | ||
| private final static String CLS_NAME_JAVA_SQL_SERIALBLOB = "javax.sql.rowset.serial.SerialBlob"; | ||
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| protected JavaSqlTypeHandlerFactory() { | ||
| _sqlDeserializers = new HashMap<>(); | ||
| _sqlDeserializers.put(CLS_NAME_JAVA_SQL_DATE, | ||
| "tools.jackson.databind.ext.sql.JavaSqlDateDeserializer"); | ||
| _sqlDeserializers.put(CLS_NAME_JAVA_SQL_TIMESTAMP, | ||
| "tools.jackson.databind.ext.sql.JavaSqlTimestampDeserializer"); | ||
| // 09-Nov-2020, tatu: No deserializer for `java.sql.Blob` yet; would require additional | ||
| // dependency and not yet requested by anyone. Add if requested | ||
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| _sqlSerializers = new HashMap<>(); | ||
| // 09-Jan-2015, tatu: As per [databind#1073], let's try to guard against possibility | ||
| // of some environments missing `java.sql.` types | ||
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| // note: timestamps are very similar to java.util.Date, thus serialized as such | ||
| _sqlSerializers.put(CLS_NAME_JAVA_SQL_TIMESTAMP, JavaUtilDateSerializer.instance); | ||
| _sqlSerializers.put(CLS_NAME_JAVA_SQL_DATE, "tools.jackson.databind.ext.sql.JavaSqlDateSerializer"); | ||
| _sqlSerializers.put(CLS_NAME_JAVA_SQL_TIME, "tools.jackson.databind.ext.sql.JavaSqlTimeSerializer"); | ||
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| // 09-Nov-2020, tatu: Not really optimal way to deal with these, problem being that | ||
| // Blob is interface and actual instance we get is usually different. So may | ||
| // need to improve if we reported bugs. But for now, do this | ||
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| _sqlSerializers.put(CLS_NAME_JAVA_SQL_BLOB, "tools.jackson.databind.ext.sql.JavaSqlBlobSerializer"); | ||
| _sqlSerializers.put(CLS_NAME_JAVA_SQL_SERIALBLOB, "tools.jackson.databind.ext.sql.JavaSqlBlobSerializer"); | ||
| } | ||
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| /* | ||
| /********************************************************************** | ||
| /* Public API | ||
| /********************************************************************** | ||
| */ | ||
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| public ValueSerializer<?> findSerializer(SerializationConfig config, JavaType type) | ||
| { | ||
| final Class<?> rawType = type.getRawClass(); | ||
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| String className = rawType.getName(); | ||
| Object sqlHandler = _sqlSerializers.get(className); | ||
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| if (sqlHandler != null) { | ||
| if (sqlHandler instanceof ValueSerializer<?>) { | ||
| return (ValueSerializer<?>) sqlHandler; | ||
| } | ||
| // must be class name otherwise | ||
| return (ValueSerializer<?>) instantiate((String) sqlHandler, type); | ||
| } | ||
| return null; | ||
| } | ||
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| public ValueDeserializer<?> findDeserializer(DeserializationConfig config, JavaType type) | ||
| { | ||
| final Class<?> rawType = type.getRawClass(); | ||
| String className = rawType.getName(); | ||
| final String deserName = _sqlDeserializers.get(className); | ||
| if (deserName != null) { | ||
| return (ValueDeserializer<?>) instantiate(deserName, type); | ||
| } | ||
| return null; | ||
| } | ||
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| public boolean hasDeserializerFor(Class<?> valueType) { | ||
| String className = valueType.getName(); | ||
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| // 06-Nov-2020, tatu: One of "java.sql" types? | ||
| return _sqlDeserializers.containsKey(className); | ||
| } | ||
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| /* | ||
| /********************************************************************** | ||
| /* Internal helper methods | ||
| /********************************************************************** | ||
| */ | ||
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| private Object instantiate(String className, JavaType valueType) | ||
| { | ||
| try { | ||
| return instantiate(Class.forName(className), valueType); | ||
| } catch (Exception e) { | ||
| throw new IllegalStateException("Failed to find class `" | ||
| +className+"` for handling values of type "+ClassUtil.getTypeDescription(valueType) | ||
| +", problem: ("+e.getClass().getName()+") "+e.getMessage()); | ||
| } | ||
| } | ||
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| private Object instantiate(Class<?> handlerClass, JavaType valueType) | ||
| { | ||
| try { | ||
| return ClassUtil.createInstance(handlerClass, false); | ||
| } catch (Exception e) { | ||
| throw new IllegalStateException("Failed to create instance of `" | ||
| +handlerClass.getName()+"` for handling values of type "+ClassUtil.getTypeDescription(valueType) | ||
| +", problem: ("+e.getClass().getName()+") "+e.getMessage()); | ||
| } | ||
| } | ||
| } |