jp.xet.uncommons.wicket.converter.PropertyConverter.java Source code

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Here is the source code for jp.xet.uncommons.wicket.converter.PropertyConverter.java

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/*
 * Copyright 2011 Daisuke Miyamoto.
 * Crimport java.util.Locale;
    
import org.apache.commons.lang.Validate;
import org.apache.wicket.Application;
import org.apache.wicket.IConverterLocator;
import org.apache.wicket.util.convert.IConverter;
import org.apache.wicket.util.convert.converter.AbstractConverter;
import org.apache.wicket.util.lang.PropertyResolver;
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 jp.xet.uncommons.wicket.converter;

import java.util.Locale;

import org.apache.wicket.Application;
import org.apache.wicket.IConverterLocator;
import org.apache.wicket.util.convert.IConverter;
import org.apache.wicket.util.convert.converter.AbstractConverter;
import org.apache.wicket.util.lang.Args;
import org.apache.wicket.util.lang.PropertyResolver;

/**
 * TODO for daisuke
 * 
 * @param <T>
 * @since 1.0
 * @version $Id$
 * @author daisuke
 */
@SuppressWarnings("serial")
public class PropertyConverter<T> extends AbstractConverter<T> {

    private final Class<T> clazz;

    private final String expression;

    /**
     * ??
     * 
     * @param clazz
     * @param expression
     * @throws IllegalArgumentException ?{@code null}???
     */
    public PropertyConverter(Class<T> clazz, String expression) {
        Args.notNull(clazz, "clazz");
        Args.notNull(expression, "expression");
        this.clazz = clazz;
        this.expression = expression;
    }

    @Override
    public T convertToObject(String value, Locale locale) {
        throw new UnsupportedOperationException();
    }

    @Override
    public String convertToString(Object value, Locale locale) {
        if (value == null) {
            return null;
        }

        Object convertedValue = PropertyResolver.getValue(expression, value);
        IConverterLocator converterLocator = Application.get().getConverterLocator();

        @SuppressWarnings("unchecked")
        IConverter<Object> converter = (IConverter<Object>) converterLocator
                .getConverter(convertedValue.getClass());

        return converter.convertToString(convertedValue, locale);
    }

    @Override
    protected Class<T> getTargetType() {
        return clazz;
    }
}