package org.apache.ojb.broker.metadata.torque;

 /* Copyright 2002-2005 The Apache Software Foundation

  *

  * Licensed 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.

  */

 import org.apache.ojb.broker.metadata.IndexDescriptor;

 import java.util.Vector;

 public class TorqueIndexGenerator {

     public void generateIndices(Vector indexDescriptors, StringBuffer buffer) {

         int numIndexes = indexDescriptors.size();

         for (int i = 0; i < numIndexes; i++) {

             IndexDescriptor index = (IndexDescriptor) indexDescriptors.get(i);

             String indexTag = getIndexTag(index);

             buffer.append("        <");

             buffer.append(indexTag);

             if (index.getName() != null) {

                 buffer.append(" name=\"");

                 buffer.append(index.getName());

                 buffer.append("\"");

             }

             buffer.append(">\n");

             generateStringVector(index.getIndexColumns(), indexTag + "-column", "name", "            ", buffer);

             buffer.append("        </");

             buffer.append(indexTag);

             buffer.append(">\n");

         }

     }

     private String getIndexTag(IndexDescriptor indexDescriptor) {

         if (indexDescriptor.isUnique()) {

             return "unique";

         } else {

             return "index";

         }

     }

     private void generateStringVector(Vector strings, String element, String attribute, String indentation, StringBuffer buffer) {

         for (int i = 0; i < strings.size(); i++) {

             buffer.append(indentation);

             buffer.append("<");

             buffer.append(element);

             buffer.append(" ");

             buffer.append(attribute);

             buffer.append("=\"");

             buffer.append(strings.get(i));

             buffer.append("\"/>\n");

         }

     }

 }