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Update.java
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Update.java
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/*
* 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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.sql;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import org.hibernate.dialect.Dialect;
import org.hibernate.type.LiteralType;
/**
* An SQL <tt>UPDATE</tt> statement
*
* @author Gavin King
*/
public class Update {
protected String tableName;
protected String versionColumnName;
protected String where;
protected String assignments;
protected String comment;
protected Map<String,String> primaryKeyColumns = new LinkedHashMap<>();
protected Map<String,String> columns = new LinkedHashMap<>();
protected Map<String,String> whereColumns = new LinkedHashMap<>();
private Dialect dialect;
public Update(Dialect dialect) {
this.dialect = dialect;
}
public String getTableName() {
return tableName;
}
public Update appendAssignmentFragment(String fragment) {
if ( assignments == null ) {
assignments = fragment;
}
else {
assignments += ", " + fragment;
}
return this;
}
public Update setTableName(String tableName) {
this.tableName = tableName;
return this;
}
public Update setPrimaryKeyColumnNames(String[] columnNames) {
this.primaryKeyColumns.clear();
addPrimaryKeyColumns(columnNames);
return this;
}
public Update addPrimaryKeyColumns(String[] columnNames) {
for ( String columnName : columnNames ) {
addPrimaryKeyColumn( columnName, "?" );
}
return this;
}
public Update addPrimaryKeyColumns(String[] columnNames, boolean[] includeColumns, String[] valueExpressions) {
for ( int i=0; i<columnNames.length; i++ ) {
if( includeColumns[i] ) {
addPrimaryKeyColumn( columnNames[i], valueExpressions[i] );
}
}
return this;
}
public Update addPrimaryKeyColumns(String[] columnNames, String[] valueExpressions) {
for ( int i=0; i<columnNames.length; i++ ) {
addPrimaryKeyColumn( columnNames[i], valueExpressions[i] );
}
return this;
}
public Update addPrimaryKeyColumn(String columnName, String valueExpression) {
this.primaryKeyColumns.put(columnName, valueExpression);
return this;
}
public Update setVersionColumnName(String versionColumnName) {
this.versionColumnName = versionColumnName;
return this;
}
public Update setComment(String comment) {
this.comment = comment;
return this;
}
public Update addColumns(String[] columnNames) {
for ( String columnName : columnNames ) {
addColumn( columnName );
}
return this;
}
public Update addColumns(String[] columnNames, boolean[] updateable, String[] valueExpressions) {
for ( int i=0; i<columnNames.length; i++ ) {
if ( updateable[i] ) {
addColumn( columnNames[i], valueExpressions[i] );
}
}
return this;
}
public Update addColumns(String[] columnNames, String valueExpression) {
for ( String columnName : columnNames ) {
addColumn( columnName, valueExpression );
}
return this;
}
public Update addColumn(String columnName) {
return addColumn(columnName, "?");
}
public Update addColumn(String columnName, String valueExpression) {
columns.put(columnName, valueExpression);
return this;
}
public Update addColumn(String columnName, Object value, LiteralType type) throws Exception {
return addColumn( columnName, type.objectToSQLString(value, dialect) );
}
public Update addWhereColumns(String[] columnNames) {
for ( String columnName : columnNames ) {
addWhereColumn( columnName );
}
return this;
}
public Update addWhereColumns(String[] columnNames, String valueExpression) {
for ( String columnName : columnNames ) {
addWhereColumn( columnName, valueExpression );
}
return this;
}
public Update addWhereColumn(String columnName) {
return addWhereColumn(columnName, "=?");
}
public Update addWhereColumn(String columnName, String valueExpression) {
whereColumns.put(columnName, valueExpression);
return this;
}
public Update setWhere(String where) {
this.where=where;
return this;
}
public String toStatementString() {
StringBuilder buf = new StringBuilder( (columns.size() * 15) + tableName.length() + 10 );
if ( comment!=null ) {
buf.append( "/* " ).append( Dialect.escapeComment( comment ) ).append( " */ " );
}
buf.append( "update " ).append( tableName ).append( " set " );
boolean assignmentsAppended = false;
Iterator<Map.Entry<String,String>> iter = columns.entrySet().iterator();
while ( iter.hasNext() ) {
Map.Entry<String,String> e = iter.next();
buf.append( e.getKey() ).append( '=' ).append( e.getValue() );
if ( iter.hasNext() ) {
buf.append( ", " );
}
assignmentsAppended = true;
}
if ( assignments != null ) {
if ( assignmentsAppended ) {
buf.append( ", " );
}
buf.append( assignments );
}
boolean conditionsAppended = false;
if ( !primaryKeyColumns.isEmpty() || where != null || !whereColumns.isEmpty() || versionColumnName != null ) {
buf.append( " where " );
}
iter = primaryKeyColumns.entrySet().iterator();
while ( iter.hasNext() ) {
Map.Entry<String,String> e = iter.next();
buf.append( e.getKey() ).append( '=' ).append( e.getValue() );
if ( iter.hasNext() ) {
buf.append( " and " );
}
conditionsAppended = true;
}
if ( where != null ) {
if ( conditionsAppended ) {
buf.append( " and " );
}
buf.append( where );
conditionsAppended = true;
}
iter = whereColumns.entrySet().iterator();
while ( iter.hasNext() ) {
final Map.Entry<String,String> e = iter.next();
if ( conditionsAppended ) {
buf.append( " and " );
}
buf.append( e.getKey() ).append( e.getValue() );
conditionsAppended = true;
}
if ( versionColumnName != null ) {
if ( conditionsAppended ) {
buf.append( " and " );
}
buf.append( versionColumnName ).append( "=?" );
}
return buf.toString();
}
}