io.ebeaninternal.dbmigration.ddlgeneration.platform.util.IndexColumns Maven / Gradle / Ivy
package io.ebeaninternal.dbmigration.ddlgeneration.platform.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Set of columns making up a particular index (column order is important).
*/
public class IndexColumns {
List columns = new ArrayList<>(4);
/**
* Construct representing as a single column index.
*/
public IndexColumns(String column) {
columns.add(column);
}
/**
* Construct representing index.
*/
public IndexColumns(String[] columnNames) {
Collections.addAll(columns, columnNames);
}
/**
* Return true if this index matches (same single column).
*/
public boolean isMatch(String singleColumn) {
return columns.size() == 1 && columns.get(0).equals(singleColumn);
}
/**
* Return true if this index matches (same single column).
*/
public boolean isMatch(List columnNames) {
if (columns.size() != columnNames.size()) {
return false;
}
for (int i = 0; i < columns.size(); i++) {
if (!columns.get(i).equals(columnNames.get(i))) {
return false;
}
}
return true;
}
/**
* Return true if this index matches (same columns same order).
*/
public boolean isMatch(IndexColumns other) {
return columns.equals(other.columns);
}
/**
* Add a unique index based on the single column.
*/
protected void add(String column) {
columns.add(column);
}
}