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Hibernate's core ORM functionality
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.mapping;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.model.naming.Identifier;
import org.hibernate.boot.model.relational.Exportable;
import org.hibernate.boot.model.relational.InitCommand;
import org.hibernate.boot.model.relational.Namespace;
import org.hibernate.boot.model.relational.QualifiedTableName;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
import org.hibernate.engine.jdbc.env.spi.QualifiedObjectNameFormatter;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.tool.hbm2ddl.ColumnMetadata;
import org.hibernate.tool.hbm2ddl.TableMetadata;
import org.hibernate.tool.schema.extract.spi.ColumnInformation;
import org.hibernate.tool.schema.extract.spi.TableInformation;
import org.jboss.logging.Logger;
/**
* A relational table
*
* @author Gavin King
*/
@SuppressWarnings("unchecked")
public class Table implements RelationalModel, Serializable, Exportable {
private static final Logger log = Logger.getLogger( Table.class );
private Identifier catalog;
private Identifier schema;
private Identifier name;
/**
* contains all columns, including the primary key
*/
private Map columns = new LinkedHashMap();
private KeyValue idValue;
private PrimaryKey primaryKey;
private Map foreignKeys = new LinkedHashMap();
private Map indexes = new LinkedHashMap();
private Map uniqueKeys = new LinkedHashMap();
private int uniqueInteger;
private List checkConstraints = new ArrayList();
private String rowId;
private String subselect;
private boolean isAbstract;
private boolean hasDenormalizedTables;
private String comment;
private List initCommands;
public Table() {
}
public Table(String name) {
setName( name );
}
public Table(
Namespace namespace,
Identifier physicalTableName,
boolean isAbstract) {
this.catalog = namespace.getPhysicalName().getCatalog();
this.schema = namespace.getPhysicalName().getSchema();
this.name = physicalTableName;
this.isAbstract = isAbstract;
}
public Table(
Identifier catalog,
Identifier schema,
Identifier physicalTableName,
boolean isAbstract) {
this.catalog = catalog;
this.schema = schema;
this.name = physicalTableName;
this.isAbstract = isAbstract;
}
public Table(Namespace namespace, Identifier physicalTableName, String subselect, boolean isAbstract) {
this.catalog = namespace.getPhysicalName().getCatalog();
this.schema = namespace.getPhysicalName().getSchema();
this.name = physicalTableName;
this.subselect = subselect;
this.isAbstract = isAbstract;
}
public Table(Namespace namespace, String subselect, boolean isAbstract) {
this.catalog = namespace.getPhysicalName().getCatalog();
this.schema = namespace.getPhysicalName().getSchema();
this.subselect = subselect;
this.isAbstract = isAbstract;
}
/**
* @deprecated Should use {@link QualifiedObjectNameFormatter#format} on QualifiedObjectNameFormatter
* obtained from {@link org.hibernate.engine.jdbc.env.spi.JdbcEnvironment}
*/
@Deprecated
public String getQualifiedName(Dialect dialect, String defaultCatalog, String defaultSchema) {
if ( subselect != null ) {
return "( " + subselect + " )";
}
String quotedName = getQuotedName( dialect );
String usedSchema = schema == null ?
defaultSchema :
getQuotedSchema( dialect );
String usedCatalog = catalog == null ?
defaultCatalog :
getQuotedCatalog( dialect );
return qualify( usedCatalog, usedSchema, quotedName );
}
/**
* @deprecated Should use {@link QualifiedObjectNameFormatter#format} on QualifiedObjectNameFormatter
* obtained from {@link org.hibernate.engine.jdbc.env.spi.JdbcEnvironment}
*/
@Deprecated
public static String qualify(String catalog, String schema, String table) {
StringBuilder qualifiedName = new StringBuilder();
if ( catalog != null ) {
qualifiedName.append( catalog ).append( '.' );
}
if ( schema != null ) {
qualifiedName.append( schema ).append( '.' );
}
return qualifiedName.append( table ).toString();
}
public void setName(String name) {
this.name = Identifier.toIdentifier( name );
}
public String getName() {
return name == null ? null : name.getText();
}
public Identifier getNameIdentifier() {
return name;
}
public String getQuotedName() {
return name == null ? null : name.toString();
}
public String getQuotedName(Dialect dialect) {
return name == null ? null : name.render( dialect );
}
public QualifiedTableName getQualifiedTableName() {
return name == null ? null : new QualifiedTableName( catalog, schema, name );
}
public boolean isQuoted() {
return name.isQuoted();
}
public void setQuoted(boolean quoted) {
if ( quoted == name.isQuoted() ) {
return;
}
this.name = new Identifier( name.getText(), quoted );
}
public void setSchema(String schema) {
this.schema = Identifier.toIdentifier( schema );
}
public String getSchema() {
return schema == null ? null : schema.getText();
}
public String getQuotedSchema() {
return schema == null ? null : schema.toString();
}
public String getQuotedSchema(Dialect dialect) {
return schema == null ? null : schema.render( dialect );
}
public boolean isSchemaQuoted() {
return schema != null && schema.isQuoted();
}
public void setCatalog(String catalog) {
this.catalog = Identifier.toIdentifier( catalog );
}
public String getCatalog() {
return catalog == null ? null : catalog.getText();
}
public String getQuotedCatalog() {
return catalog == null ? null : catalog.render();
}
public String getQuotedCatalog(Dialect dialect) {
return catalog == null ? null : catalog.render( dialect );
}
public boolean isCatalogQuoted() {
return catalog != null && catalog.isQuoted();
}
/**
* Return the column which is identified by column provided as argument.
*
* @param column column with atleast a name.
* @return the underlying column or null if not inside this table. Note: the instance *can* be different than the input parameter, but the name will be the same.
*/
public Column getColumn(Column column) {
if ( column == null ) {
return null;
}
Column myColumn = (Column) columns.get( column.getCanonicalName() );
return column.equals( myColumn ) ?
myColumn :
null;
}
public Column getColumn(Identifier name) {
if ( name == null ) {
return null;
}
return (Column) columns.get( name.getCanonicalName() );
}
public Column getColumn(int n) {
Iterator iter = columns.values().iterator();
for ( int i = 0; i < n - 1; i++ ) {
iter.next();
}
return (Column) iter.next();
}
public void addColumn(Column column) {
Column old = getColumn( column );
if ( old == null ) {
if ( primaryKey != null ) {
for ( Column c : primaryKey.getColumns() ) {
if ( c.getCanonicalName().equals( column.getCanonicalName() ) ) {
column.setNullable( false );
log.debugf(
"Forcing column [%s] to be non-null as it is part of the primary key for table [%s]",
column.getCanonicalName(),
getNameIdentifier().getCanonicalName()
);
}
}
}
this.columns.put( column.getCanonicalName(), column );
column.uniqueInteger = this.columns.size();
}
else {
column.uniqueInteger = old.uniqueInteger;
}
}
public int getColumnSpan() {
return columns.size();
}
public Iterator getColumnIterator() {
return columns.values().iterator();
}
public Iterator getIndexIterator() {
return indexes.values().iterator();
}
public Iterator getForeignKeyIterator() {
return foreignKeys.values().iterator();
}
public Map getForeignKeys() {
return Collections.unmodifiableMap( foreignKeys );
}
public Iterator getUniqueKeyIterator() {
return getUniqueKeys().values().iterator();
}
Map getUniqueKeys() {
cleanseUniqueKeyMapIfNeeded();
return uniqueKeys;
}
private int sizeOfUniqueKeyMapOnLastCleanse;
private void cleanseUniqueKeyMapIfNeeded() {
if ( uniqueKeys.size() == sizeOfUniqueKeyMapOnLastCleanse ) {
// nothing to do
return;
}
cleanseUniqueKeyMap();
sizeOfUniqueKeyMapOnLastCleanse = uniqueKeys.size();
}
private void cleanseUniqueKeyMap() {
// We need to account for a few conditions here...
// 1) If there are multiple unique keys contained in the uniqueKeys Map, we need to deduplicate
// any sharing the same columns as other defined unique keys; this is needed for the annotation
// processor since it creates unique constraints automagically for the user
// 2) Remove any unique keys that share the same columns as the primary key; again, this is
// needed for the annotation processor to handle @Id @OneToOne cases. In such cases the
// unique key is unnecessary because a primary key is already unique by definition. We handle
// this case specifically because some databases fail if you try to apply a unique key to
// the primary key columns which causes schema export to fail in these cases.
if ( uniqueKeys.isEmpty() ) {
// nothing to do
return;
}
else if ( uniqueKeys.size() == 1 ) {
// we have to worry about condition 2 above, but not condition 1
final Map.Entry uniqueKeyEntry = uniqueKeys.entrySet().iterator().next();
if ( isSameAsPrimaryKeyColumns( uniqueKeyEntry.getValue() ) ) {
uniqueKeys.remove( uniqueKeyEntry.getKey() );
}
}
else {
// we have to check both conditions 1 and 2
final Iterator> uniqueKeyEntries = uniqueKeys.entrySet().iterator();
while ( uniqueKeyEntries.hasNext() ) {
final Map.Entry uniqueKeyEntry = uniqueKeyEntries.next();
final UniqueKey uniqueKey = uniqueKeyEntry.getValue();
boolean removeIt = false;
// condition 1 : check against other unique keys
for ( UniqueKey otherUniqueKey : uniqueKeys.values() ) {
// make sure its not the same unique key
if ( uniqueKeyEntry.getValue() == otherUniqueKey ) {
continue;
}
if ( otherUniqueKey.getColumns().containsAll( uniqueKey.getColumns() )
&& uniqueKey.getColumns().containsAll( otherUniqueKey.getColumns() ) ) {
removeIt = true;
break;
}
}
// condition 2 : check against pk
if ( isSameAsPrimaryKeyColumns( uniqueKeyEntry.getValue() ) ) {
removeIt = true;
}
if ( removeIt ) {
//uniqueKeys.remove( uniqueKeyEntry.getKey() );
uniqueKeyEntries.remove();
}
}
}
}
private boolean isSameAsPrimaryKeyColumns(UniqueKey uniqueKey) {
if ( primaryKey == null || ! primaryKey.columnIterator().hasNext() ) {
// happens for many-to-many tables
return false;
}
return primaryKey.getColumns().containsAll( uniqueKey.getColumns() )
&& uniqueKey.getColumns().containsAll( primaryKey.getColumns() );
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((catalog == null) ? 0 : catalog.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + ((schema == null) ? 0 : schema.hashCode());
return result;
}
@Override
public boolean equals(Object object) {
return object instanceof Table && equals((Table) object);
}
public boolean equals(Table table) {
if (null == table) {
return false;
}
if (this == table) {
return true;
}
return Identifier.areEqual( name, table.name )
&& Identifier.areEqual( schema, table.schema )
&& Identifier.areEqual( catalog, table.catalog );
}
public void validateColumns(Dialect dialect, Mapping mapping, TableMetadata tableInfo) {
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
Column col = (Column) iter.next();
ColumnMetadata columnInfo = tableInfo.getColumnMetadata( col.getName() );
if ( columnInfo == null ) {
throw new HibernateException( "Missing column: " + col.getName() + " in " + Table.qualify( tableInfo.getCatalog(), tableInfo.getSchema(), tableInfo.getName()));
}
else {
final boolean typesMatch = col.getSqlType( dialect, mapping ).toLowerCase(Locale.ROOT)
.startsWith( columnInfo.getTypeName().toLowerCase(Locale.ROOT) )
|| columnInfo.getTypeCode() == col.getSqlTypeCode( mapping );
if ( !typesMatch ) {
throw new HibernateException(
"Wrong column type in " +
Table.qualify( tableInfo.getCatalog(), tableInfo.getSchema(), tableInfo.getName()) +
" for column " + col.getName() +
". Found: " + columnInfo.getTypeName().toLowerCase(Locale.ROOT) +
", expected: " + col.getSqlType( dialect, mapping )
);
}
}
}
}
public Iterator sqlAlterStrings(
Dialect dialect,
Metadata metadata,
TableInformation tableInfo,
Identifier defaultCatalog,
Identifier defaultSchema) throws HibernateException {
final JdbcEnvironment jdbcEnvironment = metadata.getDatabase().getJdbcEnvironment();
final String tableName = jdbcEnvironment.getQualifiedObjectNameFormatter().format(
new QualifiedTableName(
catalog != null ? catalog : defaultCatalog,
schema != null ? schema : defaultSchema,
name
),
dialect
);
StringBuilder root = new StringBuilder( dialect.getAlterTableString( tableName ) )
.append( ' ' )
.append( dialect.getAddColumnString() );
Iterator iter = getColumnIterator();
List results = new ArrayList();
while ( iter.hasNext() ) {
final Column column = (Column) iter.next();
final ColumnInformation columnInfo = tableInfo.getColumn( Identifier.toIdentifier( column.getName(), column.isQuoted() ) );
if ( columnInfo == null ) {
// the column doesnt exist at all.
StringBuilder alter = new StringBuilder( root.toString() )
.append( ' ' )
.append( column.getQuotedName( dialect ) )
.append( ' ' )
.append( column.getSqlType( dialect, metadata ) );
String defaultValue = column.getDefaultValue();
if ( defaultValue != null ) {
alter.append( " default " ).append( defaultValue );
}
if ( column.isNullable() ) {
alter.append( dialect.getNullColumnString() );
}
else {
alter.append( " not null" );
}
if ( column.isUnique() ) {
String keyName = Constraint.generateName( "UK_", this, column );
UniqueKey uk = getOrCreateUniqueKey( keyName );
uk.addColumn( column );
alter.append( dialect.getUniqueDelegate()
.getColumnDefinitionUniquenessFragment( column ) );
}
if ( column.hasCheckConstraint() && dialect.supportsColumnCheck() ) {
alter.append( " check(" )
.append( column.getCheckConstraint() )
.append( ")" );
}
String columnComment = column.getComment();
if ( columnComment != null ) {
alter.append( dialect.getColumnComment( columnComment ) );
}
alter.append( dialect.getAddColumnSuffixString() );
results.add( alter.toString() );
}
}
if ( results.isEmpty() ) {
log.debugf( "No alter strings for table : %s", getQuotedName() );
}
return results.iterator();
}
public boolean hasPrimaryKey() {
return getPrimaryKey() != null;
}
public String sqlCreateString(Dialect dialect, Mapping p, String defaultCatalog, String defaultSchema) {
StringBuilder buf = new StringBuilder( hasPrimaryKey() ? dialect.getCreateTableString() : dialect.getCreateMultisetTableString() )
.append( ' ' )
.append( getQualifiedName( dialect, defaultCatalog, defaultSchema ) )
.append( " (" );
boolean identityColumn = idValue != null && idValue.isIdentityColumn( p.getIdentifierGeneratorFactory(), dialect );
// Try to find out the name of the primary key to create it as identity if the IdentityGenerator is used
String pkname = null;
if ( hasPrimaryKey() && identityColumn ) {
pkname = ( (Column) getPrimaryKey().getColumnIterator().next() ).getQuotedName( dialect );
}
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
Column col = (Column) iter.next();
buf.append( col.getQuotedName( dialect ) )
.append( ' ' );
if ( identityColumn && col.getQuotedName( dialect ).equals( pkname ) ) {
// to support dialects that have their own identity data type
if ( dialect.getIdentityColumnSupport().hasDataTypeInIdentityColumn() ) {
buf.append( col.getSqlType( dialect, p ) );
}
buf.append( ' ' )
.append( dialect.getIdentityColumnSupport().getIdentityColumnString( col.getSqlTypeCode( p ) ) );
}
else {
buf.append( col.getSqlType( dialect, p ) );
String defaultValue = col.getDefaultValue();
if ( defaultValue != null ) {
buf.append( " default " ).append( defaultValue );
}
if ( col.isNullable() ) {
buf.append( dialect.getNullColumnString() );
}
else {
buf.append( " not null" );
}
}
if ( col.isUnique() ) {
String keyName = Constraint.generateName( "UK_", this, col );
UniqueKey uk = getOrCreateUniqueKey( keyName );
uk.addColumn( col );
buf.append( dialect.getUniqueDelegate()
.getColumnDefinitionUniquenessFragment( col ) );
}
if ( col.hasCheckConstraint() && dialect.supportsColumnCheck() ) {
buf.append( " check (" )
.append( col.getCheckConstraint() )
.append( ")" );
}
String columnComment = col.getComment();
if ( columnComment != null ) {
buf.append( dialect.getColumnComment( columnComment ) );
}
if ( iter.hasNext() ) {
buf.append( ", " );
}
}
if ( hasPrimaryKey() ) {
buf.append( ", " )
.append( getPrimaryKey().sqlConstraintString( dialect ) );
}
buf.append( dialect.getUniqueDelegate().getTableCreationUniqueConstraintsFragment( this ) );
if ( dialect.supportsTableCheck() ) {
for ( String checkConstraint : checkConstraints ) {
buf.append( ", check (" )
.append( checkConstraint )
.append( ')' );
}
}
buf.append( ')' );
if ( comment != null ) {
buf.append( dialect.getTableComment( comment ) );
}
return buf.append( dialect.getTableTypeString() ).toString();
}
public String sqlDropString(Dialect dialect, String defaultCatalog, String defaultSchema) {
return dialect.getDropTableString( getQualifiedName( dialect, defaultCatalog, defaultSchema ) );
}
public PrimaryKey getPrimaryKey() {
return primaryKey;
}
public void setPrimaryKey(PrimaryKey primaryKey) {
this.primaryKey = primaryKey;
}
public Index getOrCreateIndex(String indexName) {
Index index = indexes.get( indexName );
if ( index == null ) {
index = new Index();
index.setName( indexName );
index.setTable( this );
indexes.put( indexName, index );
}
return index;
}
public Index getIndex(String indexName) {
return indexes.get( indexName );
}
public Index addIndex(Index index) {
Index current = indexes.get( index.getName() );
if ( current != null ) {
throw new MappingException( "Index " + index.getName() + " already exists!" );
}
indexes.put( index.getName(), index );
return index;
}
public UniqueKey addUniqueKey(UniqueKey uniqueKey) {
UniqueKey current = uniqueKeys.get( uniqueKey.getName() );
if ( current != null ) {
throw new MappingException( "UniqueKey " + uniqueKey.getName() + " already exists!" );
}
uniqueKeys.put( uniqueKey.getName(), uniqueKey );
return uniqueKey;
}
public UniqueKey createUniqueKey(List keyColumns) {
String keyName = Constraint.generateName( "UK_", this, keyColumns );
UniqueKey uk = getOrCreateUniqueKey( keyName );
uk.addColumns( keyColumns.iterator() );
return uk;
}
public UniqueKey getUniqueKey(String keyName) {
return uniqueKeys.get( keyName );
}
public UniqueKey getOrCreateUniqueKey(String keyName) {
UniqueKey uk = uniqueKeys.get( keyName );
if ( uk == null ) {
uk = new UniqueKey();
uk.setName( keyName );
uk.setTable( this );
uniqueKeys.put( keyName, uk );
}
return uk;
}
public void createForeignKeys() {
}
public ForeignKey createForeignKey(String keyName, List keyColumns, String referencedEntityName, String keyDefinition) {
return createForeignKey( keyName, keyColumns, referencedEntityName, keyDefinition, null );
}
public ForeignKey createForeignKey(
String keyName,
List keyColumns,
String referencedEntityName,
String keyDefinition,
List referencedColumns) {
final ForeignKeyKey key = new ForeignKeyKey( keyColumns, referencedEntityName, referencedColumns );
ForeignKey fk = foreignKeys.get( key );
if ( fk == null ) {
fk = new ForeignKey();
fk.setTable( this );
fk.setReferencedEntityName( referencedEntityName );
fk.setKeyDefinition(keyDefinition);
fk.addColumns( keyColumns.iterator() );
if ( referencedColumns != null ) {
fk.addReferencedColumns( referencedColumns.iterator() );
}
// NOTE : if the name is null, we will generate an implicit name during second pass processing
// after we know the referenced table name (which might not be resolved yet).
fk.setName( keyName );
foreignKeys.put( key, fk );
}
if ( keyName != null ) {
fk.setName( keyName );
}
return fk;
}
// This must be done outside of Table, rather than statically, to ensure
// deterministic alias names. See HHH-2448.
public void setUniqueInteger( int uniqueInteger ) {
this.uniqueInteger = uniqueInteger;
}
public int getUniqueInteger() {
return uniqueInteger;
}
public void setIdentifierValue(KeyValue idValue) {
this.idValue = idValue;
}
public KeyValue getIdentifierValue() {
return idValue;
}
public void addCheckConstraint(String constraint) {
checkConstraints.add( constraint );
}
public boolean containsColumn(Column column) {
return columns.containsValue( column );
}
public String getRowId() {
return rowId;
}
public void setRowId(String rowId) {
this.rowId = rowId;
}
public String toString() {
StringBuilder buf = new StringBuilder().append( getClass().getName() )
.append( '(' );
if ( getCatalog() != null ) {
buf.append( getCatalog() ).append( "." );
}
if ( getSchema() != null ) {
buf.append( getSchema() ).append( "." );
}
buf.append( getName() ).append( ')' );
return buf.toString();
}
public String getSubselect() {
return subselect;
}
public void setSubselect(String subselect) {
this.subselect = subselect;
}
public boolean isSubselect() {
return subselect != null;
}
public boolean isAbstractUnionTable() {
return hasDenormalizedTables() && isAbstract;
}
public boolean hasDenormalizedTables() {
return hasDenormalizedTables;
}
void setHasDenormalizedTables() {
hasDenormalizedTables = true;
}
public void setAbstract(boolean isAbstract) {
this.isAbstract = isAbstract;
}
public boolean isAbstract() {
return isAbstract;
}
public boolean isPhysicalTable() {
return !isSubselect() && !isAbstractUnionTable();
}
public String getComment() {
return comment;
}
public void setComment(String comment) {
this.comment = comment;
}
public Iterator getCheckConstraintsIterator() {
return checkConstraints.iterator();
}
public Iterator sqlCommentStrings(Dialect dialect, String defaultCatalog, String defaultSchema) {
List comments = new ArrayList();
if ( dialect.supportsCommentOn() ) {
String tableName = getQualifiedName( dialect, defaultCatalog, defaultSchema );
if ( comment != null ) {
comments.add( "comment on table " + tableName + " is '" + comment + "'" );
}
Iterator iter = getColumnIterator();
while ( iter.hasNext() ) {
Column column = (Column) iter.next();
String columnComment = column.getComment();
if ( columnComment != null ) {
comments.add( "comment on column " + tableName + '.' + column.getQuotedName( dialect ) + " is '" + columnComment + "'" );
}
}
}
return comments.iterator();
}
@Override
public String getExportIdentifier() {
return Table.qualify(
render( catalog ),
render( schema ),
name.render()
);
}
private String render(Identifier identifier) {
return identifier == null ? null : identifier.render();
}
public static class ForeignKeyKey implements Serializable {
String referencedClassName;
List columns;
List referencedColumns;
ForeignKeyKey(List columns, String referencedClassName, List referencedColumns) {
this.referencedClassName = referencedClassName;
this.columns = new ArrayList();
this.columns.addAll( columns );
if ( referencedColumns != null ) {
this.referencedColumns = new ArrayList();
this.referencedColumns.addAll( referencedColumns );
}
else {
this.referencedColumns = Collections.EMPTY_LIST;
}
}
public int hashCode() {
return columns.hashCode() + referencedColumns.hashCode();
}
public boolean equals(Object other) {
ForeignKeyKey fkk = (ForeignKeyKey) other;
return fkk != null && fkk.columns.equals( columns ) && fkk.referencedColumns.equals( referencedColumns );
}
@Override
public String toString() {
return "ForeignKeyKey{" +
"columns=" + String.join( ",", columns ) +
", referencedClassName='" + referencedClassName + '\'' +
", referencedColumns=" + String.join( ",", referencedColumns ) +
'}';
}
}
public void addInitCommand(InitCommand command) {
if ( initCommands == null ) {
initCommands = new ArrayList();
}
initCommands.add( command );
}
public List getInitCommands() {
if ( initCommands == null ) {
return Collections.emptyList();
}
else {
return Collections.unmodifiableList( initCommands );
}
}
}