Composite.java

/*
 * Copyright 2007 - 2017 the original author or authors.
 *
 * 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 net.sf.jailer.domainmodel;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import net.sf.jailer.datamodel.Association;
import net.sf.jailer.datamodel.Table;

/**
 * A group of tables to be treated in the same way as a single table
 * for rendering and domain model analysis.
 * 
 * @author Ralf Wisser
 */
public class Composite {

	/**
	 * The main table representing the entire composite.
	 */
	public final Table mainTable;
	
	/**
	 * The component tables.
	 */
	public final List<Table> componentTables;
	
	/**
	 * Constructor.
	 * 
	 * @param mainTable the main table representing the entire composite
	 * @param componentTables the component tables
	 */
	public Composite(Table mainTable, List<Table> componentTables) {
		this.mainTable = mainTable;
		this.componentTables = new ArrayList<Table>(componentTables);
		Collections.sort(this.componentTables);
	}

	/**
	 * Gets all associations of a composites' table with a table outside.
	 * 
	 * @return Set of all associations of a composites' table with a table outside
	 */
	public Set<Association> getAssociations() {
		Set<Association> associationSet = new HashSet<Association>();
		Set<Table> allTables = new HashSet<Table>();
		allTables.add(mainTable);
		allTables.addAll(componentTables);
		
		for (Table table: allTables) {
			for (Association a: table.associations) {
				if (!allTables.contains(a.destination)) {
					associationSet.add(a);
				}
			}
		}
		return associationSet;
	}

	/**
	 * Stringifies a composite.
	 */
	@Override
	public String toString() {
		StringBuffer str = new StringBuffer(componentTables.isEmpty()? "Table " : "Composite ");
		str.append(mainTable.getName());
		return str.toString();
	}

}