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783de4f80a
Constraint implementation support Regular expression constraint git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2547 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
57 lines
2.0 KiB
Java
57 lines
2.0 KiB
Java
/*
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* Copyright (C) 2005 Alfresco, Inc.
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*
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* Licensed under the Mozilla Public License version 1.1
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* with a permitted attribution clause. You may obtain a
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* copy of the License at
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*
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* http://www.alfresco.org/legal/license.txt
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific
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* language governing permissions and limitations under the
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* License.
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*/
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package org.alfresco.service.cmr.dictionary;
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/**
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* The interface for classes that implement constraints on property values.
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* <p>
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* Implementations of the actual constraint code should must not synchronize
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* or in any other way block threads. Concurrent access of the evaluation
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* method is expected, but will always occur after initialization has completed.
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* <p>
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* Attention to performance is <u>crucial</u> for all implementations as
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* instances of this class are heavily used.
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* <p>
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* The constraint implementations can provide standard setter methods that will
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* be populated by bean setter injection. Once all the available properties have
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* been set, the contraint will be initialized.
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*
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* @author Derek Hulley
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*/
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public interface Constraint
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{
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/**
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* Initializes the constraint with appropriate values, which will depend
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* on the implementation itself. This method can be implemented as a
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* once-off, i.e. reinitialization does not have to be supported.
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*
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* @param parameters constraint parameters
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*/
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public void initialize();
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/**
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* Evaluates a property value according to the implementation and initialization
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* parameters provided.
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*
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* @param value the property value to check
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*
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* @throws ConstraintException if the value doesn't pass all constraints
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*/
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public void evaluate(Object value);
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}
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