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'Edifatto' is an open source software library for parsing, generating and verifying EDIFACT and X12 documents written by Volker Bergmann.
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/*
 * Copyright (C) 2013-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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.databene.edifatto.template;

import org.databene.commons.Assert;
import org.databene.edifatto.gui.ParameterizationHelper;
import org.databene.edifatto.model.Component;
import org.databene.edifatto.model.EdiGroup;
import org.databene.edifatto.model.EdiItem;
import org.databene.edifatto.model.EdiParent;
import org.databene.edifatto.model.Interchange;
import org.databene.edifatto.model.Segment;

/**
 * Creates a {@link DataModel} based on an {@link Interchange} with parameterization tags.
 * Created: 28.07.2014 15:31:51
 * @since 2.0.0
 * @author Volker Bergmann
 */

public class DataModelBuilder {

	private String javaPackage;
	private String parentClass;
	
	public DataModelBuilder(String javaPackage, String parentClass) {
		this.javaPackage = javaPackage;
		this.parentClass = parentClass;
	}
	
	public DataModel buildModel(Interchange interchange) {
		DataModel dataModel = new DataModel();
		analyzeGroup(interchange, true, dataModel);
		return dataModel;
	}

	private void analyzeGroup(EdiGroup group, boolean root, DataModel dataModel) {
		String beanClassName = Assert.notNull(ParameterizationHelper.getBeanClassName(group), "beanClassName");
		ClassInfo classInfo = new ClassInfo(beanClassName, group);
		classInfo.setJavaPackage(javaPackage);
		classInfo.setParentClass(parentClass);
		dataModel.addClassInfo(classInfo);
		int singularSegmentCount = countSingularSegments(group);
		if (root) {
			singularSegmentCount -= 2;
			dataModel.setRootClassName(beanClassName);
		}
		classInfo.setBaseSegmentCount(singularSegmentCount);
		extractSimpleProperties(group, classInfo, dataModel);
		extractCollectionProperties(group, classInfo, dataModel);
	}

	private int countSingularSegments(EdiGroup group) {
		int count = 0;
		for (int i = 0; i < group.getChildCount(); i++) {
			EdiItem child = group.getChild(i);
			if (child instanceof EdiGroup && !ParameterizationHelper.isParameterized(child))
				count += countSingularSegments((EdiGroup) child);
			else if (child instanceof Segment)
				count++;
		}
		return count;
	}

	private void extractSimpleProperties(EdiParent group, ClassInfo classInfo, DataModel dataModel) {
		for (int i = 0; i < group.getChildCount(); i++) {
			EdiItem child = group.getChild(i);
			String propertyName = ParameterizationHelper.getPropertyName(child);
			if (child instanceof EdiParent && !ParameterizationHelper.isParameterized(child))
				extractSimpleProperties((EdiParent) child, classInfo, dataModel);
			if (child instanceof Component && propertyName != null)
				classInfo.addPropertyInfo(propertyName, "String", false, child);
		}
	}

	private void extractCollectionProperties(EdiParent group, ClassInfo classInfo, DataModel dataModel) {
		for (int i = 0; i < group.getChildCount(); i++) {
			EdiItem child = group.getChild(i);
			String propertyName = ParameterizationHelper.getPropertyName(child);
			if (child instanceof EdiGroup) {
				if (propertyName != null) {
					String type = ParameterizationHelper.getBeanClassName(child);
					classInfo.addPropertyInfo(propertyName, type, true, child);
					analyzeGroup((EdiGroup) child, false, dataModel);
				} else {
					extractCollectionProperties((EdiGroup) child, classInfo, dataModel);
				}
			}
		}
	}

}