equalvalidator.java

一个使用struts+hibernate+spring开发的完的网站源代码。

/*
 * Copyright 2004 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.
 */
package org.apache.myfaces.custom.equalvalidator;

import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import javax.faces.component.UIInput;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

import org.apache.myfaces.util.MessageUtils;

/**
 * @author mwessendorf (latest modification by $Author: matzew $)
 * @version $Revision: 1.6 $ $Date: 2004/11/30 09:37:42 $
 * $Log: EqualValidator.java,v $
 * Revision 1.6  2004/11/30 09:37:42  matzew
 * changes i18n-messages for validation
 *
 * Revision 1.5  2004/10/13 11:50:57  matze
 * renamed packages to org.apache
 *
 * Revision 1.4  2004/07/01 21:53:10  mwessendorf
 * ASF switch
 *
 * Revision 1.3  2004/06/27 22:06:26  mwessendorf
 * Log
 *
 *
 */
public class EqualValidator implements Validator, StateHolder {

	/**
	 * <p>The standard converter id for this converter.</p>
	 */
	public static final String 	VALIDATOR_ID 	   = "org.apache.myfaces.validator.Equal";

	/**
	 * <p>The message identifier of the {@link FacesMessage} to be created if
	 * the equal_for check fails.</p>
	 */
	public static final String EQUAL_MESSAGE_ID = "org.apache.myfaces.Equal.INVALID";	

	public EqualValidator(){
	}

	//the foreign component_id on which the validation is based.
	private String _for= null;

	
	//JSF-Field for StateHolder-IF
	private boolean _transient = false;


	// -------------------------------------------------------- ValidatorIF
	public void validate(
		FacesContext facesContext,
		UIComponent uiComponent,
		Object value)
		throws ValidatorException {

			if (facesContext == null) throw new NullPointerException("facesContext");
			if (uiComponent == null) throw new NullPointerException("uiComponent");

			if (value == null)
			{
				return;
		}

		UIInput foreignComp = (UIInput) uiComponent.getParent().findComponent(_for);
		if(foreignComp==null)
			throw new FacesException("Unable to find component '" + _for + "' (calling findComponent on component '" + uiComponent.getId() + "')");

		Object[] args = {value.toString(),(foreignComp.getValue()==null) ? foreignComp.getId():foreignComp.getValue().toString()};

		if(foreignComp.getValue()==null || !foreignComp.getValue().toString().equals(value.toString())  )
			throw new ValidatorException(MessageUtils.getMessage(FacesMessage.SEVERITY_ERROR,EQUAL_MESSAGE_ID, args));
		
	}
	// -------------------------------------------------------- StateholderIF

	public Object saveState(FacesContext context) {
		Object state = _for;
		return state;
	}

	public void restoreState(FacesContext context, Object state) {
		_for = (String) state;
	}

	public boolean isTransient() {
		return _transient;
	}

	public void setTransient(boolean newTransientValue) {
		_transient = newTransientValue;
	}
	// -------------------------------------------------------- GETTER & SETTER

	/**
	 * @return the foreign component_id, on which a value should be validated
	 */
	public String getFor() {
		return _for;
	}

	/**
	 * @param string the foreign component_id, on which a value should be validated
	 */
	public void setFor(String string) {
		_for = string;
	}

}