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DifferentialFieldSpecification.php
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Tue, Jul 1, 14:09

DifferentialFieldSpecification.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed 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.
*/
/**
* Describes and implements the behavior for a custom field on Differential
* revisions. Along with other configuration, you can extend this class to add
* custom fields to Differential revisions and commit messages.
*
* Generally, you should implement all methods from the storage task and then
* the methods from one or more interface tasks.
*
* @task storage Field Storage
* @task edit Extending the Revision Edit Interface
* @task view Extending the Revision View Interface
*/
abstract class DifferentialFieldSpecification {
/* -( Storage )------------------------------------------------------------ */
/**
* Return a unique string used to key storage of this field's value, like
* "mycompany.fieldname" or similar.
*
* @return string Unique key which identifies this field in auxiliary field
* storage. Maximum length is 32.
* @group storage
*/
abstract public function getStorageKey();
/**
* Return a serialized representation of the field value, appropriate for
* storing in auxiliary field storage.
*
* @return string Serialized field value.
* @group storage
*/
abstract public function getValueForStorage();
/**
* Set the field's value given a serialized storage value. This is called
* when the field is loaded; if no data is available, the value will be
* null.
*
* @param string|null Serialized field representation (from
* getValueForStorage) or null if no value has ever been
* stored.
* @return this
* @group storage
*/
abstract public function setValueFromStorage($value);
/* -( Extending the Revision Edit Interface )------------------------------ */
/**
* @task edit
*/
public function shouldAppearOnEdit() {
return false;
}
/**
* @task edit
*/
public function setValueFromRequest(AphrontRequest $request) {
throw new DifferentialFieldSpecificationIncompleteException($this);
}
/**
* @task edit
*/
public function renderEditControl() {
throw new DifferentialFieldSpecificationIncompleteException($this);
}
/**
* @task edit
*/
public function validateField() {
throw new DifferentialFieldSpecificationIncompleteException($this);
}
/* -( Extending the Revision View Interface )------------------------------ */
/**
* @task view
*/
public function shouldAppearOnRevisionView() {
return false;
}
/**
* @task view
*/
public function renderLabelForRevisionView() {
throw new DifferentialFieldSpecificationIncompleteException($this);
}
/**
* @task view
*/
public function renderValueForRevisionView() {
throw new DifferentialFieldSpecificationIncompleteException($this);
}
}

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