/
Index.java
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/
Index.java
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package org.jumpmind.symmetric.core.model;
/*
* 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.
*/
import java.util.ArrayList;
/**
* Base class for indices.
*/
public abstract class Index {
/** The name of the index. */
protected String _name;
/** The columns making up the index. */
protected ArrayList<IndexColumn> _columns = new ArrayList<IndexColumn>();
abstract public String toVerboseString();
abstract public boolean isUnique();
/**
* {@inheritDoc}
*/
public String getName() {
return _name;
}
/**
* {@inheritDoc}
*/
public void setName(String name) {
_name = name;
}
/**
* {@inheritDoc}
*/
public int getColumnCount() {
return _columns.size();
}
/**
* {@inheritDoc}
*/
public IndexColumn getColumn(int idx) {
return (IndexColumn) _columns.get(idx);
}
/**
* {@inheritDoc}
*/
public IndexColumn[] getColumns() {
return (IndexColumn[]) _columns.toArray(new IndexColumn[_columns.size()]);
}
/**
* {@inheritDoc}
*/
public boolean hasColumn(Column column) {
for (int idx = 0; idx < _columns.size(); idx++) {
IndexColumn curColumn = getColumn(idx);
if (column.equals(curColumn.getColumn())) {
return true;
}
}
return false;
}
/**
* {@inheritDoc}
*/
public void addColumn(IndexColumn column) {
if (column != null) {
for (int idx = 0; idx < _columns.size(); idx++) {
IndexColumn curColumn = getColumn(idx);
if (curColumn.getOrdinalPosition() > column.getOrdinalPosition()) {
_columns.add(idx, column);
return;
}
}
_columns.add(column);
}
}
/**
* {@inheritDoc}
*/
public void removeColumn(IndexColumn column) {
_columns.remove(column);
}
/**
* {@inheritDoc}
*/
public void removeColumn(int idx) {
_columns.remove(idx);
}
/**
* {@inheritDoc}
*/
public abstract Object clone() throws CloneNotSupportedException;
}