varargssqlfunction.java

介绍了hibernate的入门有一些基本常用的事例

//$Id: VarArgsSQLFunction.java,v 1.1 2005/04/13 04:44:35 oneovthafew Exp $
package org.hibernate.dialect.function;

import java.util.List;

import org.hibernate.QueryException;
import org.hibernate.engine.Mapping;
import org.hibernate.type.Type;

public class VarArgsSQLFunction implements SQLFunction {

	private String begin;
	private String sep;
	private String end;
	private Type type;
	
	public VarArgsSQLFunction(Type type, String begin, String sep, String end) {
		this.begin = begin;
		this.sep = sep;
		this.end = end;
		this.type = type;
	}

	public Type getReturnType(Type columnType, Mapping mapping) throws QueryException {
		return type;
	}

	public boolean hasArguments() {
		return true;
	}

	public boolean hasParenthesesIfNoArguments() {
		return true;
	}

	public String render(List args) throws QueryException {
		StringBuffer buf = new StringBuffer().append(begin);
		for ( int i=0; i<args.size(); i++ ) {
			buf.append( args.get(i) );
			if (i<args.size()-1) buf.append(sep);
		}
		return buf.append(end).toString();
	}

}