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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.openjpa.jdbc.identifier;
import java.io.Serializable;
import org.apache.openjpa.lib.identifier.Identifier;
import org.apache.openjpa.lib.identifier.IdentifierImpl;
import org.apache.openjpa.lib.util.StringUtil;
/**
* Encapsulates a database identifier. With a few exceptions, this class is
* intended to treated as immutable.
*/
public class DBIdentifier extends IdentifierImpl implements Cloneable, Identifier, Serializable {
private static final long serialVersionUID = 1L;
/**
* Database identifier types.
*/
public enum DBIdentifierType {
DEFAULT,
TABLE,
SCHEMA,
CATALOG,
DATABASE,
COLUMN,
COLUMN_DEFINITION,
SEQUENCE,
CONSTRAINT,
INDEX,
FOREIGN_KEY,
CONSTANT,
PROCEDURE,
NULL
}
// Array for quick compound identifier determination. Compound identifiers
// can have multi-part names, such as {schema, table} and should be stored
// as a QualifiedDBIdentifier.
private static boolean _compoundIdentifier[] = new boolean[DBIdentifierType.values().length];
static {
_compoundIdentifier[DBIdentifierType.TABLE.ordinal()] = true;
_compoundIdentifier[DBIdentifierType.COLUMN.ordinal()] = true;
_compoundIdentifier[DBIdentifierType.SEQUENCE.ordinal()] = true;
_compoundIdentifier[DBIdentifierType.CONSTRAINT.ordinal()] = true;
_compoundIdentifier[DBIdentifierType.INDEX.ordinal()] = true;
}
private DBIdentifierType _type = DBIdentifierType.DEFAULT;
/**
* Special NULL indicator for db identifiers.
*/
public static final DBIdentifier NULL = new DBIdentifier(DBIdentifierType.NULL);
public boolean _ignoreCase = false;
// All constructors are protected or private. Static factory operations
// should be used to construct new identifiers.
protected DBIdentifier() {
}
/**
* Returns whether case is ignored during equality operations.
*/
public boolean getIgnoreCase() {
return _ignoreCase;
}
public void setIgnoreCase(boolean ignoreCase) {
_ignoreCase = ignoreCase;
}
private DBIdentifier(DBIdentifierType type) {
setType(type);
}
protected DBIdentifier(String name, DBIdentifierType type) {
setType(type);
setName(name);
}
protected DBIdentifier(String name, DBIdentifierType type, boolean delimit) {
setType(type);
setName(name, delimit);
}
protected DBIdentifier(String name, boolean delimit) {
setName(name, delimit);
}
/**
* Set the name of the identifier.
*/
@Override
public void setName(String name) {
setName(name, false);
}
/**
* Set the name of this identifier based upon a given identifier.
*/
public void setName(DBIdentifier name) {
assertNotNull();
if (DBIdentifier.isNull(name)) {
setNameInternal(null);
setType(name.getType());
return;
}
setNameInternal(name.getNameInternal());
setType(name.getType());
}
/**
* Set the name of the identifier and optionally force delimiting of the identifier.
*/
public void setName(String name, boolean delimit) {
assertNotNull();
// Normalize the name, if necessary. Do not normalize constants or column definitions.
if (DBIdentifierType.CONSTANT != getType() && DBIdentifierType.COLUMN_DEFINITION != getType()) {
if (delimit) {
name = Normalizer.delimit(name, true);
} else {
name = Normalizer.normalizeString(name);
}
}
super.setName(name);
}
/**
* Set the type of the identifier
* @param type
*/
protected void setType(DBIdentifierType type) {
_type = type;
}
/**
* Get the identifier type
* @return the identifier type
*/
public DBIdentifierType getType() {
return _type;
}
/**
* Splits a string delimited by the specified delimiter of a given name type
* into an array of DBIdentifier objects.
* Example: COL1|"COL 2"|COL3 delim=| --> DBIdentifier[]{ COL1, "COL 2", COL3 }
* @param name
* @param id
* @param delim
*/
public static DBIdentifier[] split(String name, DBIdentifierType id, String delim) {
if (!Normalizer.canSplit(name, delim)) {
return new DBIdentifier[] { new DBIdentifier(name, id) };
}
String[] names = Normalizer.splitName(name, delim);
if (names.length == 0) {
return new DBIdentifier[] { };
}
DBIdentifier[] sNames = new DBIdentifier[names.length];
for (int i = 0; i < names.length ; i++) {
sNames[i] = new DBIdentifier(names[i], id);
}
return sNames;
}
/**
* Joins the list of identifiers using the appropriate delimiters and
* returns a string based identifier.
* @param resultId
* @param names
*/
public static String join(DBIdentifier...names) {
if (names == null || names.length == 0) {
return null;
}
String[] strNames = new String[names.length];
for (int i = 0; i < names.length; i++) {
strNames[i] = names[i].getNameInternal();
}
return Normalizer.joinNames(strNames);
}
/**
* Splits a given DBIdentifier into multiple DBIdentifiers. Uses the base name
* type and heuristics to determine the types and placement of the resulting
* components.
* @param name
*/
public static DBIdentifier[] split(DBIdentifierType resultType, String name) {
String[] names = Normalizer.splitName(name);
switch (names.length) {
case 2:
return getTwoPartIdentifier(names, resultType);
case 3:
return getThreePartIdentifier(names, resultType);
case 4:
return getFourPartIdentifier(names, resultType);
default:
return new DBIdentifier[] { new DBIdentifier(name, resultType) };
}
}
/*
* Returns a two-part identifier based upon the base identifier type.
*/
private static DBIdentifier[] getTwoPartIdentifier(String[] names, DBIdentifierType baseId) {
DBIdentifier[] sNames = new DBIdentifier[2];
DBIdentifierType id0 = DBIdentifierType.DEFAULT;
DBIdentifierType id1 = baseId;
if (baseId != DBIdentifierType.COLUMN &&
baseId != DBIdentifierType.SCHEMA) {
id0 = DBIdentifierType.SCHEMA;
}
else if (baseId == DBIdentifierType.COLUMN) {
// Length 2, base name column
id0 = DBIdentifierType.TABLE;
}
else if (baseId == DBIdentifierType.SCHEMA) {
id0 = DBIdentifierType.DATABASE;
}
sNames[0] = new DBIdentifier(names[0], id0);
sNames[1] = new DBIdentifier(names[1], id1);
return sNames;
}
/*
* Returns a three-part identifier based upon the base identifier type.
*/
private static DBIdentifier[] getThreePartIdentifier(String[] names, DBIdentifierType baseId) {
DBIdentifier[] sNames = new DBIdentifier[3];
DBIdentifierType id0 = DBIdentifierType.DEFAULT;
DBIdentifierType id1 = DBIdentifierType.DEFAULT;
DBIdentifierType id2 = baseId;
if (baseId != DBIdentifierType.SCHEMA &&
baseId != DBIdentifierType.COLUMN) {
id0 = DBIdentifierType.DATABASE;
id1 = DBIdentifierType.SCHEMA;
}
else if (baseId == DBIdentifierType.COLUMN) {
// Length 2, base name column
id0 = DBIdentifierType.SCHEMA;
id1 = DBIdentifierType.TABLE;
}
sNames[0] = new DBIdentifier(names[0], id0);
sNames[1] = new DBIdentifier(names[1], id1);
sNames[2] = new DBIdentifier(names[2], id2);
return sNames;
}
/*
* Returns a four-part identifier based upon the base identifier type.
*/
private static DBIdentifier[] getFourPartIdentifier(String[] names, DBIdentifierType baseId) {
DBIdentifier[] sNames = new DBIdentifier[4];
DBIdentifierType id0 = DBIdentifierType.DEFAULT;
DBIdentifierType id1 = DBIdentifierType.DEFAULT;
DBIdentifierType id2 = DBIdentifierType.DEFAULT;
DBIdentifierType id3 = baseId;
if (baseId == DBIdentifierType.COLUMN) {
id0 = DBIdentifierType.DATABASE;
id1 = DBIdentifierType.SCHEMA;
id2 = DBIdentifierType.TABLE;
}
sNames[0] = new DBIdentifier(names[0], id0);
sNames[1] = new DBIdentifier(names[1], id1);
sNames[2] = new DBIdentifier(names[2], id2);
sNames[3] = new DBIdentifier(names[3], id3);
return sNames;
}
/**
* Returns true if the identifier is null or the name is null or empty.
* @param name
*/
public static boolean isEmpty(DBIdentifier name) {
if (isNull(name)) {
return true;
}
return StringUtil.isEmpty(name.getName());
}
/**
* Returns true if the identifier is null.
* @param name
*/
public static boolean isNull(DBIdentifier name) {
return (name == null || name.getType() == DBIdentifierType.NULL);
}
/**
* Clones an identifier using deep copy.
*/
@Override
public DBIdentifier clone() {
DBIdentifier sName = new DBIdentifier();
sName.setNameInternal(getNameInternal());
sName.setType(getType());
sName.setIgnoreCase(getIgnoreCase());
return sName;
}
/*
* Internal method to set the base name and avoid normalizing an already
* normalized name.
* @param name
*/
private void setNameInternal(String name) {
super.setName(name);
}
/*
* Internal method to get the base name.
* normalized name.
* @param name
*/
private String getNameInternal() {
return super.getName();
}
/**
* Returns a copy of an identifier with name trimmed to null.
* @param name
*/
public static DBIdentifier trimToNull(DBIdentifier name) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
sName.setNameInternal(StringUtil.trimToNull(sName.getNameInternal()));
return sName;
}
/**
* Equality operation for identifiers. Supports comparison with strings
* and objects of this type.
*/
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj == this) {
return true;
}
if (obj instanceof DBIdentifier) {
DBIdentifier sName = (DBIdentifier)obj;
return this.equals(sName, getIgnoreCase() || sName.getIgnoreCase());
} else if (obj instanceof String) {
return obj.equals(this.getNameInternal());
}
throw new IllegalArgumentException("Unsupported type comparison: " + obj.getClass().getName());
}
/**
* Returns true if this object is NULL or has a null name component.
*/
public boolean isNull() {
return (_type == DBIdentifierType.NULL || getName() == null);
}
/**
* Comparison operator for identifiers.
*/
@Override
public int compareTo(Identifier o) {
if (o instanceof DBIdentifier) {
if (this == DBIdentifier.NULL && (o == null || o == DBIdentifier.NULL)) {
return 0;
}
if (this == DBIdentifier.NULL)
return 1;
if (o == null || o == DBIdentifier.NULL)
return -1;
}
return super.compareTo(o);
}
/**
* Converts the provided set of names to an array of identifiers of the
* provided type
* @param columnNames
* @param id
*/
public static DBIdentifier[] toArray(String[] columnNames, DBIdentifierType id) {
return toArray(columnNames, id, false);
}
/**
* Converts the provided set of names to an array of identifiers of the
* provided type, optionally delimiting the names.
* @param columnNames
* @param id
*/
public static DBIdentifier[] toArray(String[] names, DBIdentifierType id, boolean delimit) {
if (names == null) {
return null;
}
DBIdentifier[] sNames = new DBIdentifier[names.length];
for (int i = 0; i < names.length; i++) {
sNames[i] = new DBIdentifier(names[i], id, delimit);
}
return sNames;
}
/**
* Returns a string array of names based upon the provided set of identifiers.
* @param sNames
*/
public static String[] toStringArray(DBIdentifier[] sNames) {
if (sNames == null) {
return null;
}
String[] names = new String[sNames.length];
for (int i = 0; i < sNames.length; i++) {
names[i] = sNames[i].getName();
}
return names;
}
/**
* Constructs a new identifier of type Catalog.
*/
public static DBIdentifier newCatalog(String name) {
return newIdentifier(name, DBIdentifierType.CATALOG);
}
/**
* Constructs a new identifier of type Catalog ,optionally delimiting
* the name.
*/
public static DBIdentifier newCatalog(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.CATALOG, false, delimit);
}
/**
* Constructs a new identifier of type Table.
*/
public static DBIdentifier newTable(String name) {
return newIdentifier(name, DBIdentifierType.TABLE);
}
/**
* Constructs a new identifier of type Table, optionally delimiting
* the name.
*/
public static DBIdentifier newTable(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.TABLE, false, delimit);
}
/**
* Constructs a new identifier of type Column.
*/
public static DBIdentifier newColumn(String name) {
return newIdentifier(name, DBIdentifierType.COLUMN);
}
/**
* Constructs a new identifier of type Column,optionally delimiting
* the name.
*/
public static DBIdentifier newColumn(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.COLUMN, false, delimit);
}
/**
* Constructs a new identifier of type Schema.
*/
public static DBIdentifier newSchema(String name) {
return newIdentifier(name, DBIdentifierType.SCHEMA);
}
/**
* Constructs a new identifier of type Schema, optionally delimiting
* the name.
*/
public static DBIdentifier newSchema(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.SCHEMA, false, delimit);
}
/**
* Constructs a new identifier of type Index.
*/
public static DBIdentifier newIndex(String name) {
return newIdentifier(name, DBIdentifierType.INDEX);
}
/**
* Constructs a new identifier of type Index, optionally delimiting
* the name.
*/
public static DBIdentifier newIndex(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.INDEX, false, delimit);
}
/**
* Constructs a new identifier of type Sequence.
*/
public static DBIdentifier newSequence(String name) {
return newIdentifier(name, DBIdentifierType.SEQUENCE);
}
/**
* Constructs a new identifier of type Sequence, optionally delimiting
* the name.
*/
public static DBIdentifier newSequence(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.SEQUENCE, false, delimit);
}
/**
* Constructs a new identifier of type ForeignKey.
*/
public static DBIdentifier newForeignKey(String name) {
return newIdentifier(name, DBIdentifierType.FOREIGN_KEY);
}
/**
* Constructs a new identifier of type ForeignKey, optionally delimiting
* the name.
*/
public static DBIdentifier newForeignKey(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.FOREIGN_KEY, false, delimit);
}
/**
* Constructs a new identifier of type Constraint.
*/
public static DBIdentifier newConstraint(String name) {
return newIdentifier(name, DBIdentifierType.CONSTRAINT);
}
/**
* Constructs a new identifier of type Constraint, optionally delimiting
* the name.
*/
public static DBIdentifier newConstraint(String name, boolean delimit) {
return newIdentifier(name, DBIdentifierType.CONSTRAINT, false, delimit);
}
/**
* Constructs a new identifier of type Constant.
*/
public static DBIdentifier newConstant(String name) {
return newIdentifier(name, DBIdentifierType.CONSTANT);
}
/**
* Constructs a new identifier of type Column Definition.
*/
public static DBIdentifier newColumnDefinition(String name) {
return newIdentifier(name, DBIdentifierType.COLUMN_DEFINITION);
}
/**
* Constructs a new identifier of type Default.
*/
public static DBIdentifier newDefault(String name) {
return newIdentifier(name, DBIdentifierType.DEFAULT);
}
/**
* Constructs a new identifier with the provided name and type
*/
protected static DBIdentifier newIdentifier(String name, DBIdentifierType id) {
return newIdentifier(name, id, false, false);
}
/**
* Constructs a new identifier with the provided name an type. Optionally,
* converting the name to upper case.
*/
public static DBIdentifier newIdentifier(String name, DBIdentifierType id, boolean toUpper) {
return newIdentifier(name, id, toUpper, false );
}
/**
* Constructs a new identifier (potentially a compound QualifiedDBIdentifier) with the provided
* name an type. Optionally, converting the name to upper case and delimiting it.
*/
protected static DBIdentifier newIdentifier(String name, DBIdentifierType id, boolean toUpper, boolean delimit) {
return newIdentifier(name,id, toUpper, delimit, false);
}
public static DBIdentifier newProcedure(String name) {
return newIdentifier(name, DBIdentifierType.PROCEDURE);
}
/**
* Constructs a new identifier (potentially a compound QualifiedDBIdentifier) with the provided
* name an type. Optionally, converting the name to upper case and delimiting it.
*/
protected static DBIdentifier newIdentifier(String name, DBIdentifierType id, boolean toUpper, boolean delimit,
boolean ignoreCase) {
if (name == null) {
return DBIdentifier.NULL;
}
DBIdentifier dbId = DBIdentifier.NULL;
// Create a DBIDentifier for single component names. Otherwise, create a QualifiedDBIdentifier.
if (!_compoundIdentifier[id.ordinal()] || delimit) {
dbId = new DBIdentifier(name, id, delimit);
dbId.setIgnoreCase(ignoreCase);
if (toUpper) {
return toUpper(dbId);
}
} else {
// Name can be split. Break it up into components and return a path
DBIdentifier[] sNames = DBIdentifier.split(id, name);
dbId = new QualifiedDBIdentifier(sNames);
dbId.setIgnoreCase(ignoreCase);
}
return dbId;
}
/**
* Static equality method for comparing two identifiers.
* @param name1
* @param name2
*/
public static boolean equal(DBIdentifier name1, DBIdentifier name2) {
boolean name1Null = DBIdentifier.isNull(name1);
if (name1Null && DBIdentifier.isNull(name2)) {
return true;
}
if (name1Null) {
return false;
}
return ((DBIdentifier)name1).equals(name2, false);
}
private void assertNotNull() {
if (this == DBIdentifier.NULL || getType() == DBIdentifierType.NULL) {
throw new IllegalStateException("Cannot modify NULL instance");
}
}
/**
* Returns a new DBIdentifier truncated to length
* @param name
* @param length
*/
public static DBIdentifier truncate(DBIdentifier name, int length) {
DBIdentifier sName = name.clone();
String strName = sName.getNameInternal();
if (StringUtil.isEmpty(strName)) {
return sName;
}
strName = Normalizer.truncate(strName, length);
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new DBIdentifier with the given string appended.
* @param name
* @param length
*/
public static DBIdentifier append(DBIdentifier name, String str) {
DBIdentifier sName = name.clone();
String strName = sName.getNameInternal();
strName = Normalizer.append(strName, str);
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new DBIdentifier with the given string combined using
* delimiting rules and appropriate separators.
* @param name
* @param length
*/
public static DBIdentifier combine(DBIdentifier name, String str) {
DBIdentifier sName = name.clone();
String strName = sName.getNameInternal();
strName = Normalizer.combine(strName, str);
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new DBIdentifier converted to lower case - if not delimited.
* @param name
*/
public static DBIdentifier toLower(DBIdentifier name) {
return toLower(name, false);
}
/**
* Returns a new DBIdentifier converted to lower case. If delimited,
* force to lower case using force option.
* @param name
*/
public static DBIdentifier toLower(DBIdentifier name, boolean force) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
if (sName.getNameInternal() == null) {
return sName;
}
// Do not convert delimited names to lower case. They may have
// been delimited to preserve case.
if (force || !Normalizer.isDelimited(sName.getNameInternal())) {
sName.setNameInternal(sName.getNameInternal().toLowerCase());
}
return sName;
}
/**
* Returns a new DBIdentifier converted to upper case - if not delimited.
* @param name
*/
public static DBIdentifier toUpper(DBIdentifier name) {
return toUpper(name, false);
}
/**
* Returns a new DBIdentifier converted to upper case. If delimited,
* force to upper case using force option.
* @param name
*/
public static DBIdentifier toUpper(DBIdentifier name, boolean force) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
if (sName.getNameInternal() == null) {
return sName;
}
// Do not convert delimited names to upper case. They may have
// been delimited to preserve case.
if (force || !Normalizer.isDelimited(sName.getNameInternal())) {
sName.setNameInternal(sName.getNameInternal().toUpperCase());
}
return sName;
}
/**
* Returns a new DBIdentifier with the specified leading string removed.
* @param name
*/
public static DBIdentifier removeLeading(DBIdentifier name, String leadingStr) {
DBIdentifier sName = name.clone();
if (isEmpty(sName)) {
return sName;
}
String strName = sName.getNameInternal();
int leadingLen = leadingStr.length();
while (strName.startsWith(leadingStr)) {
strName = strName.substring(leadingLen);
}
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new DBIdentifier with Hungarian notation removed.
* @param name
*/
public static DBIdentifier removeHungarianNotation(DBIdentifier name) {
DBIdentifier hName = name.clone();
if (isEmpty(hName)) {
return hName;
}
String strName = hName.getNameInternal();
strName = Normalizer.removeHungarianNotation(strName);
hName.setNameInternal(strName);
return hName;
}
/**
* Equality operator which ignores case.
* @param name
*/
public boolean equalsIgnoreCase(DBIdentifier name) {
return equals(name, true);
}
/**
* Static equality operator which ignores case.
* @param name
* @return
*/
public static boolean equalsIgnoreCase(DBIdentifier name1, DBIdentifier name2) {
boolean name1Null = DBIdentifier.isNull(name1);
if (name1Null && DBIdentifier.isNull(name2)) {
return true;
}
if (name1Null) {
return false;
}
return name1.equals(name2, true);
}
private boolean equals(DBIdentifier sName, boolean ignoreCase) {
if (sName.getNameInternal() == null && getNameInternal() == null) {
return true;
}
if (getNameInternal() == null) {
return false;
}
if (getIgnoreCase() || sName.getIgnoreCase() ||
ignoreCase || !Normalizer.isDelimited(getNameInternal())) {
return getNameInternal().equalsIgnoreCase(sName.getNameInternal());
}
return getNameInternal().equals(sName.getNameInternal());
}
/**
* Returns a new identifier with a combined prefix and name using the standard name
* concatenation character ('_').
* @param prefix
*/
public static DBIdentifier preCombine(DBIdentifier name, String prefix) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
String strName = sName.getNameInternal();
strName = Normalizer.combine(prefix, strName);
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new identifier with delimiters removed.
* @param name
*/
public static DBIdentifier removeDelimiters(DBIdentifier name) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
if (isEmpty(sName)) {
return sName;
}
String strName = sName.getNameInternal();
strName = Normalizer.removeDelimiters(strName);
sName.setNameInternal(strName);
return sName;
}
/**
* Returns a new delimiter with leading and trailing spaces removed.
* @param name
*/
public static DBIdentifier trim(DBIdentifier name) {
if (DBIdentifier.isNull(name)) {
return name;
}
DBIdentifier sName = name.clone();
if (isEmpty(sName)) {
return sName;
}
String strName = sName.getNameInternal();
strName = strName.trim();
sName.setNameInternal(strName);
return sName;
}
/**
* The length of the name, including delimiting characters.
*/
@Override
public int length() {
if (DBIdentifier.isNull(this)) {
return 0;
}
return super.length();
}
/**
* Returns true if the identifier is delimited.
*/
public boolean isDelimited() {
if (DBIdentifier.isEmpty(this)) {
return false;
}
return Normalizer.isDelimited(getNameInternal());
}
/**
* Combines an array of names names using standard combining rules and
* returns an identifier of the specified type.
*/
public static DBIdentifier combine(DBIdentifierType id, String...names) {
return newIdentifier(Normalizer.combine(names), id);
}
/**
* Returns the unqualified name of this identifier.
*/
public DBIdentifier getUnqualifiedName() {
return this;
}
}
