net.java.ao.schema.TableAnnotationTableNameConverter Maven / Gradle / Ivy
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package net.java.ao.schema;
import net.java.ao.RawEntity;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import java.util.Objects;
/**
* Gets the table name from the {@link Table Table annotation}. If no annotation is
* present on the given entity then it will delegate to the configured {@link TableNameConverter}.
*
* @since 0.9
*/
public final class TableAnnotationTableNameConverter implements TableNameConverter {
public static final Class TABLE_ANNOTATION = Table.class;
private final TableNameConverter delegateTableNameConverter;
private final CanonicalClassNameTableNameConverter postProcessingTableNameConverter;
public TableAnnotationTableNameConverter(TableNameConverter delegateTableNameConverter) {
this(delegateTableNameConverter, new IdentityTableNameConverter());
}
public TableAnnotationTableNameConverter(TableNameConverter delegateTableNameConverter, CanonicalClassNameTableNameConverter postProcessingTableNameConverter) {
this.delegateTableNameConverter = Objects.requireNonNull(delegateTableNameConverter, "delegateTableNameConverter can't be null");
this.postProcessingTableNameConverter = Objects.requireNonNull(postProcessingTableNameConverter, "postProcessingTableNameConverter can't be null");
}
/**
* Gets the name of the table either from the {@link Table Table annotation} if present or from the
* {@link TableNameConverter delegate}.
*
* @param entityClass the entity from which to extract the table name
* @return the table name for the given entity
* @throws IllegalStateException if the {@link Table Table annotation} value is invalid ({@code null} or
* empty {@link String})
*/
public String getName(Class> entityClass) {
if (entityClass.isAnnotationPresent(TABLE_ANNOTATION)) {
return postProcessingTableNameConverter.getName(validate(entityClass.getAnnotation(TABLE_ANNOTATION).value()));
} else {
return delegateTableNameConverter.getName(entityClass);
}
}
private String validate(String value) {
Validate.validState(StringUtils.isNotEmpty(value), "Value %s for table annotation is not valid.", value);
return value;
}
private static class IdentityTableNameConverter extends CanonicalClassNameTableNameConverter {
@Override
protected String getName(String entityClassCanonicalName) {
return entityClassCanonicalName;
}
}
}
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