/*
* 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.consent;
import java.io.Serializable;
public abstract class ConsentAbstract implements Serializable, Consent {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* Factory method.
*
* <p>
* Used extensively by the DnD viewer.
*/
public static Consent allowIf(final boolean allowed) {
return allowed ? Allow.DEFAULT : Veto.DEFAULT;
}
private final InteractionResult interactionResult;
private final String reason;
/**
* Can be subsequently {@link #setDescription(String) modified}, but is only
* a description of the event to which this consent applies and does not
* change whether the Consent represents an allow or a veto.
*/
private String description;
private static String determineReason(final InteractionResult interactionResult) {
if (interactionResult == null) {
return null;
}
return interactionResult.getReason();
}
/**
*
* @param interactionResult
* - if <tt>null</tt> then defaults to an {@link #isAllowed()
* allowing} {@link Consent}.
*/
protected ConsentAbstract(final InteractionResult interactionResult) {
this(interactionResult, null, determineReason(interactionResult));
}
/**
* Enable legacy {@link Consent}s (not created using an
* {@link InteractionResult}) to create an {@link Consent}, specifying a
* {@link #getDescription() description} of the event and the
* {@link #getReason() reason} (if any) that the consent is vetoed.
*
* @param description
* - a description of the event to which this consent relates
* @param reason
* - if not <tt>null</tt> and not empty, is the reason this
* consent is vetoed.
*/
protected ConsentAbstract(final String description, final String reason) {
this(null, description, reason);
}
private ConsentAbstract(
final InteractionResult interactionResult,
final String description,
final String reason) {
this.interactionResult = interactionResult;
this.description = description;
this.reason = reason;
}
/**
* The reason why this has been vetoed.
*/
@Override
public String getReason() {
return isVetoed() ? this.reason : null;
}
@Override
public Consent setDescription(final String description) {
this.description = description;
return this;
}
/**
* Returns <tt>true</tt> if this object is giving permission (if the
* {@link #getReason() reason} is <tt>null</tt> or empty.
*
* @see #getReason()
*/
@Override
public boolean isAllowed() {
return this.reason == null || this.reason.equals("");
}
/**
* Returns true if this object is NOT giving permission.
*
* @see #isAllowed()
*/
@Override
public boolean isVetoed() {
return !isAllowed();
}
/**
* Underlying {@link InteractionResult} that created this {@link Consent}
* (may be <tt>null</tt>).
*
*/
@Override
public InteractionResult getInteractionResult() {
return interactionResult;
}
/**
* Description of the action allowed by this event.
*
* <p>
* (Previously, {@link Allow} consents overloaded the {@link #getReason()
* reason} property with a description of the event. This has now been
* changed so that a non-<tt>null</tt> reason always implies a {@link Veto}.
* This property captures the description.
*
* @return
*/
@Override
public String getDescription() {
return description;
}
@Override
public String toString() {
return (isVetoed() ? "VETOED" : "ALLOWED") + ", reason=" + reason;
}
}