UniqueConstraintDef.java

package jef.database.meta.def;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.UniqueConstraint;

import jef.database.dialect.DatabaseDialect;
import jef.database.dialect.type.ColumnMapping;
import jef.database.meta.ITableMetadata;
import jef.tools.StringUtils;

/**
 * 定义一个唯一约束
 * @author Jiyi
 *
 */
public class UniqueConstraintDef {
	public String name;

	public String[] columnNames;

	public UniqueConstraintDef(UniqueConstraint unique) {
		this.name=unique.name();
		this.columnNames=unique.columnNames();
	}

	public String name() {
		return name;
	}

	public String[] columnNames() {
		return columnNames;
	}
	
	public List<String> toColumnNames(ITableMetadata meta, DatabaseDialect dialect) {
		List<String> columns=new ArrayList<String>(columnNames.length);
		for(int i=0;i<columnNames.length;i++){
			String name=columnNames[i];
			for(String s: StringUtils.split(name, ',')){//为了容错，这个很有可能配错
				ColumnMapping column=meta.findField(s);
				if(column!=null){
					columns.add(column.getColumnName(dialect, true));
				}	
			}
		}
		return columns;
	}
}