01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.woody.datatype;
18:
19: import org.outerj.expression.ExpressionContext;
20:
21: /**
22: * Interface for validation rules. Most {@link Datatype} implementations will
23: * perform their validation by checking a number of these validation rules
24: * (though strictly spoken this is not required).
25: *
26: * @version $Id: ValidationRule.java 433543 2006-08-22 06:22:54Z crossley $
27: */
28: public interface ValidationRule {
29: /**
30: *
31: * @param value a value of a class supported by the ValidationRule implementation
32: * @param expressionContext many validation rules use the xReporter expression interpreter,
33: * the expressionContext allows to resolve variables used in these expressions.
34: */
35: ValidationError validate(Object value,
36: ExpressionContext expressionContext);
37:
38: /**
39: * Returns true if this ValidationRule supports validating objects of the same class
40: * as the one specified. If the flag 'arrayType' is true, this method will return true
41: * if this validation rule can validate arrays of these objects (i.e. the object passed
42: * to the validate method will then be an array).
43: */
44: boolean supportsType(Class clazz, boolean arrayType);
45: }
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