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Migrate UserType to Hibernate 6

org.openrewrite.hibernate.MigrateUserType

With Hibernate 6 the UserType interface received a type parameter making it more strictly typed. This recipe applies the changes required to adhere to this change.

Recipe source​

GitHub, Issue Tracker, Maven Central

This recipe is available under the Moderne Source Available License.

Example​

Before​
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.usertype.UserType;

import java.io.Serializable;
import java.math.BigDecimal;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Objects;

public class BigDecimalAsString implements UserType {

    @Override
    public int[] sqlTypes() {
        return new int[]{Types.VARCHAR};
    }

    @Override
    public Class returnedClass() {
        return BigDecimal.class;
    }

    @Override
    public boolean equals(Object x, Object y) {
        return Objects.equals(x, y);
    }

    @Override
    public int hashCode(Object x) {
        return Objects.hashCode(x);
    }

    @Override
    public Object nullSafeGet(ResultSet rs, String[] names, SharedSessionContractImplementor session, Object owner) throws SQLException {
        String string = rs.getString(names[0]);
        return string == null || rs.wasNull() ? null : new BigDecimal(string);
    }

    @Override
    public void nullSafeSet(PreparedStatement st, Object value, int index, SharedSessionContractImplementor session) throws SQLException {
        if (value == null) {
            st.setNull(index, Types.VARCHAR);
        } else {
            st.setString(index, value.toString());
        }
    }

    @Override
    public Object deepCopy(Object value1) {
        return value1;
    }

    @Override
    public boolean isMutable() {
        return false;
    }

    @Override
    public Serializable disassemble(Object value) {
        return (BigDecimal) value;
    }

    @Override
    public Object assemble(Serializable cached, Object owner) {
        return cached;
    }

    @Override
    public Object replace(Object original, Object target, Object owner) {
        return original;
    }
}
After​
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.usertype.UserType;

import java.io.Serializable;
import java.math.BigDecimal;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Objects;

public class BigDecimalAsString implements UserType<BigDecimal> {

    @Override
    public int getSqlType() {
        return Types.VARCHAR;
    }

    @Override
    public Class<BigDecimal> returnedClass() {
        return BigDecimal.class;
    }

    @Override
    public boolean equals(BigDecimal x, BigDecimal y) {
        return Objects.equals(x, y);
    }

    @Override
    public int hashCode(BigDecimal x) {
        return Objects.hashCode(x);
    }

    @Override
    public BigDecimal nullSafeGet(ResultSet rs, int position, SharedSessionContractImplementor session, Object owner) throws SQLException {
        String string = rs.getString(position);
        return string == null || rs.wasNull() ? null : new BigDecimal(string);
    }

    @Override
    public void nullSafeSet(PreparedStatement st, BigDecimal value, int index, SharedSessionContractImplementor session) throws SQLException {
        if (value == null) {
            st.setNull(index, Types.VARCHAR);
        } else {
            st.setString(index, value.toString());
        }
    }

    @Override
    public BigDecimal deepCopy(BigDecimal value1) {
        return value1;
    }

    @Override
    public boolean isMutable() {
        return false;
    }

    @Override
    public Serializable disassemble(BigDecimal value) {
        return value;
    }

    @Override
    public BigDecimal assemble(Serializable cached, Object owner) {
        return (BigDecimal) cached;
    }

    @Override
    public BigDecimal replace(BigDecimal original, BigDecimal target, Object owner) {
        return original;
    }
}

Usage​

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-hibernate in your build file or by running a shell command (in which case no build changes are needed):

  1. Add the following to your build.gradle file:
build.gradle
plugins {
    id("org.openrewrite.rewrite") version("7.6.2")
}

rewrite {
    activeRecipe("org.openrewrite.hibernate.MigrateUserType")
    setExportDatatables(true)
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-hibernate:2.7.0")
}
  1. Run gradle rewriteRun to run the recipe.

See how this recipe works across multiple open-source repositories​

Run this recipe on OSS repos at scale with the Moderne SaaS.

The community edition of the Moderne platform enables you to easily run recipes across thousands of open-source repositories.

Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.

Data Tables​

Source files that had results​

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column NameDescription
Source path before the runThe source path of the file before the run. null when a source file was created during the run.
Source path after the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changesIn a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changesThe specific recipe that made a change.
Estimated time savingAn estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
CycleThe recipe cycle in which the change was made.

Contributors​

Laurens Westerlaken, Tim te Beek, Jonathan Schnéider