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Jodd DB is efficient and thin database facade; DbOom is convenient database object mapper.
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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package jodd.db.oom;
import jodd.bean.BeanUtil;
import jodd.util.StringUtil;
/**
* Some utilities.
*/
public class DbOomUtil {
/**
* Populates entity with generated column values from executed query.
*/
public static void populateGeneratedKeys(Object entity, DbOomQuery query) {
String[] generatedColumns = query.getGeneratedColumnNames();
if (generatedColumns == null) {
return;
}
DbEntityDescriptor ded = query.getManager().lookupType(entity.getClass());
// prepare key types
Class[] keyTypes = new Class[generatedColumns.length];
String[] properties = new String[generatedColumns.length];
for (int i = 0; i < generatedColumns.length; i++) {
String column = generatedColumns[i];
DbEntityColumnDescriptor decd = ded.findByColumnName(column);
if (decd != null) {
keyTypes[i] = decd.getPropertyType();
properties[i] = decd.getPropertyName();
}
}
Object keyValues = query.findGeneratedColumns(keyTypes);
if (!keyValues.getClass().isArray()) {
BeanUtil.declared.setProperty(entity, properties[0], keyValues);
} else {
for (int i = 0; i < properties.length; i++) {
BeanUtil.declared.setProperty(entity, properties[i], ((Object[]) keyValues)[i]);
}
}
}
/**
* Returns initial collections size when max
* value is provided.
*/
public static int initialCollectionSize(int max) {
return max > 0 ? max : 10;
}
/**
* Returns true if a value is considered empty i.e. not existing.
*/
public static boolean isEmptyColumnValue(DbEntityColumnDescriptor dec, Object value) {
if (value == null) {
return true;
}
// special case for ID column
if (dec.isId() && value instanceof Number) {
if (((Number) value).intValue() == 0) {
return true;
}
}
// special case for primitives
if (dec.getPropertyType().isPrimitive()) {
int n = ((Number) value).intValue();
if (n == 0) {
return true;
}
}
// special case for strings
if (value instanceof CharSequence) {
if (StringUtil.isBlank((CharSequence) value)) {
return true;
}
}
return false;
}
}