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/*******************************************************************************
* Copyright (c) 2006, 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.gen.internal;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.jpt.db.internal.Table;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.iterators.FilteringIterator;
class GenScope {
private final Map<Table, GenTable> genTables = new HashMap<Table, GenTable>();
private IProgressMonitor progressMonitor;
// ********** construction/initialization **********
GenScope(Collection<Table> tables, EntityGenerator.Config entityConfig, IProgressMonitor progressMonitor) {
super();
this.initialize(tables, entityConfig, progressMonitor);
}
private void checkCanceled() {
if (this.progressMonitor.isCanceled()) {
throw new OperationCanceledException();
}
}
private void initialize(Collection<Table> tables, EntityGenerator.Config entityConfig, IProgressMonitor monitor) {
this.progressMonitor = monitor;
this.buildGenTables(tables, entityConfig);
checkCanceled();
this.configureManyToManyRelations();
checkCanceled();
this.configureManyToOneRelations();
checkCanceled();
this.configureFieldNames();
checkCanceled();
}
private void buildGenTables(Collection<Table> tables, EntityGenerator.Config entityConfig) {
int size = tables.size();
// pass around a growing list of the entity names so we can avoid duplicates
Set<String> entityNames = new HashSet<String>(size);
for (Table table : tables) {
this.buildGenTable(table, entityConfig, entityNames);
this.progressMonitor.worked(40/size);
}
}
private void buildGenTable(Table table, EntityGenerator.Config entityConfig, Collection<String> entityNames) {
this.genTables.put(table, new GenTable(this, table, entityConfig, entityNames));
}
/**
* find all the "join" tables
*/
private void configureManyToManyRelations() {
int tablesSize = CollectionTools.size(this.tables());
//first time takes the longest, should we take that into account?
for (Iterator<GenTable> stream = this.tables(); stream.hasNext(); ) {
checkCanceled();
stream.next().configureManyToManyRelations();
this.progressMonitor.worked(730/tablesSize);
}
// revert any "join" table that is referenced by another table back to an "entity" table
Set<GenTable> referencedTables = this.buildReferencedTables();
tablesSize = CollectionTools.size(this.joinTables());
for (Iterator<GenTable> stream = this.joinTables(); stream.hasNext(); ) {
GenTable joinGenTable = stream.next();
if (referencedTables.contains(joinGenTable)) {
joinGenTable.clearJoinTableRelation();
}
this.progressMonitor.worked(40/tablesSize);
}
}
/**
* find all the many-to-one and one-to-many relations
*/
private void configureManyToOneRelations() {
int tablesSize = CollectionTools.size(this.entityTables());
for (Iterator<GenTable> stream = this.entityTables(); stream.hasNext(); ) {
stream.next().configureManyToOneRelations();
this.progressMonitor.worked(50/tablesSize);
}
}
/**
* determine all the Java field names up-front because we will
* need them for things like 'mappedBy' annotation elements
*/
private void configureFieldNames() {
int tablesSize = CollectionTools.size(this.entityTables());
for (Iterator<GenTable> stream = this.entityTables(); stream.hasNext(); ) {
stream.next().configureFieldNames();
this.progressMonitor.worked(50/tablesSize);
}
}
// ********** package API **********
/**
* return only the gen tables that are suitable for generating
* entities (i.e. exclude the "join" tables)
*/
Iterator<GenTable> entityTables() {
return new FilteringIterator<GenTable>(this.tables()) {
@Override
protected boolean accept(Object next) {
return ! ((GenTable) next).isJoinTable();
}
};
}
int numEntityTables() {
return CollectionTools.size(entityTables());
}
/**
* return the gen table corresponding to the specified table
*/
GenTable genTable(Table table) {
return this.genTables.get(table);
}
// ********** internal API **********
private Iterator<GenTable> tables() {
return this.genTables.values().iterator();
}
/**
* return only the "join" gen tables
*/
private Iterator<GenTable> joinTables() {
return new FilteringIterator<GenTable>(this.tables()) {
@Override
protected boolean accept(Object next) {
return ((GenTable) next).isJoinTable();
}
};
}
/**
* build a set of the tables that are referenced by other tables
* in the scope
*/
private Set<GenTable> buildReferencedTables() {
int size = CollectionTools.size(this.tables());
Set<GenTable> referencedTables = new HashSet<GenTable>(this.genTables.size());
for (Iterator<GenTable> stream = this.tables(); stream.hasNext(); ) {
stream.next().addReferencedTablesTo(referencedTables);
this.progressMonitor.worked(20/size);
}
return referencedTables;
}
}
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