am.ik.categolj2.infra.codelist.MethodInvokingCodeList.java Source code

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Here is the source code for am.ik.categolj2.infra.codelist.MethodInvokingCodeList.java

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/*
 * Copyright (C) 2014 Toshiaki Maki
 *
 * 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 am.ik.categolj2.infra.codelist;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.BeanWrapper;
import org.springframework.beans.PropertyAccessorFactory;
import org.springframework.core.convert.ConversionService;
import org.springframework.format.support.DefaultFormattingConversionService;
import org.springframework.util.MethodInvoker;
import org.terasoluna.gfw.common.codelist.AbstractReloadableCodeList;

public class MethodInvokingCodeList extends AbstractReloadableCodeList {

    private String valueField;

    private String labelField;

    private MethodInvoker methodInvoker;

    private ConversionService conversionService = new DefaultFormattingConversionService();

    public void setValueField(String valueField) {
        this.valueField = valueField;
    }

    public void setLabelField(String labelField) {
        this.labelField = labelField;
    }

    public void setMethodInvoker(MethodInvoker methodInvoker) {
        this.methodInvoker = methodInvoker;
    }

    @Override
    protected Map<String, String> retrieveMap() {
        try {
            methodInvoker.prepare();
            List<?> targetList = (List<?>) methodInvoker.invoke();
            Map<String, String> map = new LinkedHashMap<>();
            for (Object target : targetList) {
                BeanWrapper beanWrapper = PropertyAccessorFactory.forBeanPropertyAccess(target);
                Object valueObject = beanWrapper.getPropertyValue(valueField);
                Object labelObject = beanWrapper.getPropertyValue(labelField);
                String value = conversionService.convert(valueObject, String.class);
                String label = conversionService.convert(labelObject, String.class);
                map.put(value, label);
            }
            return map;
        } catch (Exception e) {
            throw new IllegalStateException(e);
        }
    }
}