org.apache.openjpa.meta.UpdateStrategies Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.meta;
import java.util.Arrays;
import java.util.List;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.lib.util.StringDistance;
/**
* Strategies for persistent value updates.
*
* @author Abe White
* @since 0.4.0
*/
public class UpdateStrategies {
/**
* No update strategy.
*/
public static final int NONE = 0;
/**
* Ignore updates; field is always considered clean.
*/
public static final int IGNORE = 1;
/**
* Throw an exception on attempt to update.
*/
public static final int RESTRICT = 2;
private static final Localizer _loc = Localizer.forPackage
(UpdateStrategies.class);
/**
* Convert the given strategy to a name.
*/
public static String getName(int strategy) {
switch (strategy) {
case NONE:
return "none";
case IGNORE:
return "ignore";
case RESTRICT:
return "restrict";
default:
throw new IllegalArgumentException(String.valueOf(strategy));
}
}
/**
* Convert the given strategy name to its constant.
*/
public static int getCode(String val, Object context) {
if ("none".equals(val))
return NONE;
if ("ignore".equals(val))
return IGNORE;
if ("restrict".equals(val))
return RESTRICT;
List opts = Arrays.asList(new String[]{ "none", "ignore", "restrict" });
String closest = StringDistance.getClosestLevenshteinDistance(val,
opts, .5F);
String msg;
if (closest != null)
msg = _loc.get("bad-update-strategy-hint", new Object[]{
context, val, closest, opts }).getMessage();
else
msg = _loc.get("bad-update-strategy", context, val, opts)
.getMessage();
throw new IllegalArgumentException(msg);
}
}