/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* 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.isis.core.metamodel.facets.objectvalue.maxlen;
import org.apache.isis.applib.events.ValidityEvent;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facetapi.Facet;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.SingleIntValueFacetAbstract;
import org.apache.isis.core.metamodel.interactions.ProposedHolder;
import org.apache.isis.core.metamodel.interactions.ValidityContext;
import org.apache.isis.core.metamodel.spec.ObjectAdapterUtils;
public abstract class MaxLengthFacetAbstract extends SingleIntValueFacetAbstract implements MaxLengthFacet {
public static Class<? extends Facet> type() {
return MaxLengthFacet.class;
}
public MaxLengthFacetAbstract(final int value, final FacetHolder holder) {
super(type(), holder, value);
}
/**
* Whether the provided argument exceeds the {@link #value() maximum length}
* .
*/
@Override
public boolean exceeds(final ObjectAdapter adapter) {
final String str = ObjectAdapterUtils.unwrapObjectAsString(adapter);
if (str == null) {
return false;
}
final int maxLength = value();
return maxLength != 0 && str.length() > maxLength;
}
@Override
public String invalidates(final ValidityContext<? extends ValidityEvent> context) {
if (!(context instanceof ProposedHolder)) {
return null;
}
final ProposedHolder proposedHolder = (ProposedHolder) context;
final ObjectAdapter proposedArgument = proposedHolder.getProposed();
if (!exceeds(proposedArgument)) {
return null;
}
return "The value proposed exceeds the maximum length of " + value();
}
@Override
protected String toStringValues() {
final int val = value();
return val == 0 ? "unlimited" : String.valueOf(val);
}
}