net.java.ao.schema.TableAnnotationTableNameConverter Maven / Gradle / Ivy
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This is the core library for Active Objects. It is generic and can be embedded in any environment.
As such it is generic and won't contain all connection pooling, etc.
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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