de.interseroh.report.controller.ParameterFormBinder.java Source code

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Here is the source code for de.interseroh.report.controller.ParameterFormBinder.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 *
 * (c) 2015 - Interseroh and Crowdcode
 */
package de.interseroh.report.controller;

import java.util.List;

import org.springframework.beans.MutablePropertyValues;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.validation.BindingResult;
import org.springframework.validation.DataBinder;

import de.interseroh.report.domain.ParameterForm;
import de.interseroh.report.domain.ParameterUtils;
import de.interseroh.report.domain.ScalarParameter;
import de.interseroh.report.domain.visitors.AbstractParameterVisitor;

/**
 * @author Ingo Dppe (Crowdcode)
 */
@Component
public class ParameterFormBinder {

    public void bind(final ParameterForm parameterForm, final MultiValueMap<String, String> requestParameters,
            BindingResult bindingResult) {

        final MutablePropertyValues mpvs = createPropertyValues(parameterForm, requestParameters);

        DataBinder dataBinder = new DataBinder(parameterForm, bindingResult.getObjectName());
        dataBinder.bind(mpvs);
        bindingResult.addAllErrors(dataBinder.getBindingResult());
    }

    private MutablePropertyValues createPropertyValues(ParameterForm parameterForm,
            final MultiValueMap<String, String> requestParameters) {
        final MutablePropertyValues mpvs = new MutablePropertyValues();

        parameterForm.accept(new AbstractParameterVisitor() {
            @Override
            public <V, T> void visit(ScalarParameter<V, T> parameter) {
                String name = parameter.getName();
                String propertyPath = ParameterUtils.nameToTextPath(name);
                Class<T> textType = parameter.getTextType();

                if (requestParameters.containsKey(name)) {
                    addText(name, propertyPath, textType);
                } else if (requestParameters.containsKey('_' + name)) {
                    addText('_' + name, propertyPath, textType);
                }
            }

            private <T> void addText(String name, String propertyPath, Class<T> textType) {
                List<String> values = requestParameters.get(name);
                if (textType.isArray()) {
                    mpvs.add(propertyPath, values.toArray());
                } else {
                    for (String requestValue : values) {
                        mpvs.add(propertyPath, requestValue);
                    }
                }
            }
        });
        return mpvs;
    }

}