/*
* Copyright 2002-2010 the original author or authors.
*
* 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 org.springframework.core.convert.support;
import java.util.Map;
import org.springframework.core.convert.ConversionFailedException;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.GenericConverter;
/**
* Internal utilities for the conversion package.
*
* @author Keith Donald
* @since 3.0
*/
abstract class ConversionUtils {
public static Object invokeConverter(GenericConverter converter, Object source, TypeDescriptor sourceType,
TypeDescriptor targetType) {
try {
return converter.convert(source, sourceType, targetType);
}
catch (ConversionFailedException ex) {
throw ex;
}
catch (Exception ex) {
throw new ConversionFailedException(sourceType, targetType, source, ex);
}
}
public static TypeDescriptor[] getMapEntryTypes(Map<?, ?> sourceMap) {
Class<?> keyType = null;
Class<?> valueType = null;
for (Object entry : sourceMap.entrySet()) {
Map.Entry<?, ?> mapEntry = (Map.Entry<?, ?>) entry;
Object key = mapEntry.getKey();
if (keyType == null && key != null) {
keyType = key.getClass();
}
Object value = mapEntry.getValue();
if (valueType == null && value != null) {
valueType = value.getClass();
}
if (keyType!= null && valueType != null) {
break;
}
}
return new TypeDescriptor[] { TypeDescriptor.valueOf(keyType), TypeDescriptor.valueOf(valueType) };
}
}
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