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Anteros Bean Validation for Java.

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/*******************************************************************************
 * Copyright 2012 Anteros Tecnologia
 *  
 * 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.
 *******************************************************************************/
package br.com.anteros.bean.validation.messageinterpolation;

import java.util.Arrays;

import br.com.anteros.validation.api.MessageInterpolator.Context;


public class ParameterTermResolver implements TermResolver {

	public String interpolate(Context context, String expression) {
		String resolvedExpression;
		Object variable = context.getConstraintDescriptor()
				.getAttributes()
				.get( removeCurlyBraces( expression ) );
		if ( variable != null ) {
			if ( variable.getClass().isArray() ) {
				resolvedExpression = Arrays.toString( (Object[]) variable );
			}
			else {
				resolvedExpression = variable.toString();
			}
		}
		else {
			resolvedExpression = expression;
		}
		return resolvedExpression;
	}

	private String removeCurlyBraces(String parameter) {
		return parameter.substring( 1, parameter.length() - 1 );
	}
}