SimpleMandatoryCollectionLinkParameterValidator.java

package fr.openwide.core.wicket.more.link.descriptor.parameter.validator;

import java.util.Collection;

import org.apache.wicket.model.IModel;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.util.lang.Args;

import com.google.common.collect.ImmutableList;

@SuppressWarnings("rawtypes")
public class SimpleMandatoryCollectionLinkParameterValidator implements ILinkParameterValidator {
	
	private static final long serialVersionUID = 7015800524943994171L;
	
	private final Collection<String> parameterNames;
	
	private final Collection<? extends IModel<? extends Collection>> parameterModels;
	
	public SimpleMandatoryCollectionLinkParameterValidator(String parameterName, IModel<? extends Collection> parameterModel) {
		this(ImmutableList.of(parameterName), ImmutableList.of(parameterModel));
	}
	
	public SimpleMandatoryCollectionLinkParameterValidator(Collection<String> parameterNames,
			Collection<? extends IModel<? extends Collection>> parameterModels) {
		Args.notNull(parameterNames, "parameterNames");
		Args.notNull(parameterModels, "parameterModels");
		this.parameterNames = ImmutableList.copyOf(parameterNames);
		this.parameterModels = ImmutableList.copyOf(parameterModels);
	}

	@Override
	public void validateSerialized(PageParameters parameters, LinkParameterValidationErrorCollector collector) {
		for (String parameterName : parameterNames) {
			if (parameters.get(parameterName).isNull()) {
				collector.addError(String.format("Mandatory parameter '%s' was missing.", parameterName));
			}
		}
	}

	@Override
	public void validateModel(LinkParameterValidationErrorCollector collector) {
		for (IModel<? extends Collection> parameterModel : parameterModels) {
			Collection<?> object = parameterModel.getObject();
			if (object == null || object.isEmpty()) {
				collector.addError(String.format("A mandatory parameter model object for parameter names '%s' was null or empty.", parameterNames));
			}
		}
	}

	@Override
	public void detach() {
		for (IModel<?> parameterModel : parameterModels) {
			parameterModel.detach();
		}
	}

}