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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
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.access.translator.ejbql;
import org.apache.cayenne.ejbql.EJBQLBaseVisitor;
import org.apache.cayenne.ejbql.EJBQLExpression;
/**
* A translator of EJBQL UPDATE statements into SQL.
*
* @since 3.0
*/
class EJBQLUpdateTranslator extends EJBQLBaseVisitor {
private EJBQLTranslationContext context;
private int itemCount;
EJBQLUpdateTranslator(EJBQLTranslationContext context) {
this.context = context;
}
EJBQLTranslationContext getContext() {
return context;
}
@Override
public boolean visitUpdate(EJBQLExpression expression) {
context.append("UPDATE");
return true;
}
@Override
public boolean visitWhere(EJBQLExpression expression) {
context.append(" WHERE");
expression.visit(context.getTranslatorFactory().getConditionTranslator(context));
return false;
}
@Override
public boolean visitFrom(EJBQLExpression expression, int finishedChildIndex) {
expression.visit(context.getTranslatorFactory().getFromTranslator(context));
return false;
}
@Override
public boolean visitUpdateItem(EJBQLExpression expression, int finishedChildIndex) {
if (itemCount++ > 0) {
context.append(',');
}
else {
context.append(" SET");
}
expression.visit(context.getTranslatorFactory().getUpdateItemTranslator(context));
return false;
}
}