org.adorsys.waguia.lightxls.loader.SheetColumnToClazzFieldMatching.java Source code

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Here is the source code for org.adorsys.waguia.lightxls.loader.SheetColumnToClazzFieldMatching.java

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/**
 * Copyright (C) 2012 Waguia W. Boris boris.waguia@adorsys.com
 *
 * 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.adorsys.waguia.lightxls.loader;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import org.adorsys.waguia.lightxls.core.EasyMatching;
import org.apache.commons.lang3.StringUtils;

/**
 * 
 * @author w2b
 *
 */
public class SheetColumnToClazzFieldMatching implements EasyMatching {
    private String[] sheetColumns;
    private Field[] clazzFields;
    private Method[] clazzMethods;
    private int numberOfFieldUnmatching;

    public SheetColumnToClazzFieldMatching() {
        super();
    }

    public SheetColumnToClazzFieldMatching(String[] sheetColumns, Field[] clazzFields, Method[] methods) {
        super();
        this.sheetColumns = sheetColumns;
        this.clazzFields = clazzFields;
    }

    /**
     * I will check if columns name match to fields, and also validate getters/setters methods for properties.
     */
    public boolean checkMatching() {
        boolean result = true;
        if (this.sheetColumns == null || this.clazzFields == null || this.clazzMethods == null) {
            throw new RuntimeException("Null value aren't required");
        }
        String[] tempArray = new String[clazzFields.length];//init the array.
        String[] fieldNames = fieldNames(clazzFields);
        //find matching ColumnName-FieldName and save them in a tempArray.
        for (int i = 0; i < this.sheetColumns.length; i++) {
            String sheetColumn = this.sheetColumns[i];
            for (int j = 0; j < fieldNames.length; j++) {
                String fieldName = fieldNames[j];
                if (sheetColumn.equals(fieldName)) {
                    tempArray[j] = fieldName;//store matching fieldName/columnName in the array.
                    break;
                }
            }
        }
        fieldNames = tempArray;
        if (clazzMethods.length < fieldNames.length)
            result = false;
        //TODO : Find spring's bean validator For getters/setters
        //Here I check if There are appropriate setter for founded fields.
        for (int i = 0; i < fieldNames.length; i++) {
            String fieldName = fieldNames[i];
            if (fieldName == null)
                continue;//check null value in the array.
            String setterMethodName = "set" + StringUtils.capitalize(fieldName);
            boolean methodFound = false;
            for (int j = 0; j < clazzMethods.length; j++) {
                Method method = clazzMethods[j];
                if (method.getName().equals(setterMethodName)) {
                    methodFound = true;
                    break;
                }
            }
            if (methodFound == false)
                result = false;
        }
        return result;
    }

    private String[] fieldNames(Field[] fields) {
        if (fields == null)
            throw new NullPointerException("Unable to transfrom fields properties to array of String.");
        List<String> arrayList = new ArrayList<String>();
        for (Field field : fields) {
            arrayList.add(field.getName());
        }
        return (String[]) arrayList.toArray(new String[arrayList.size()]);
    }

    public boolean checkMatching(String[] columnNames, Field[] fields, Method[] methods) {
        this.sheetColumns = columnNames;
        this.clazzMethods = methods;
        this.clazzFields = fields;
        return checkMatching();
    }

}