com.sun.webui.jsf.validator.StringLengthValidator Maven / Gradle / Ivy
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/*
* StringLengthValidator.java
*
* Created on February 11, 2005, 9:58 AM
*/
package com.sun.webui.jsf.validator;
import java.text.MessageFormat;
import javax.faces.application.FacesMessage;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import com.sun.webui.theme.Theme;
import com.sun.webui.jsf.util.ThemeUtilities;
/**
* Use this validator to check the number of characters in a string when
* you need to set the validation messages.
*
* @author avk
*/
public class StringLengthValidator implements Validator, StateHolder {
/**
* The converter id for this converter.
*/
public static final String VALIDATOR_ID = "com.sun.webui.jsf.StringLength";
/**
* The message to use in case the value is too short. May include
* {0} for the minimum value.
*/
private String tooShortMessage = null;
/**
* The message to use in case the value is too long. May include
* {0} for the maximum value.
*/
private String tooLongMessage;
private int minLength = 0;
private int maxLength = 0;
private boolean minimumSet = false;
private static final boolean DEBUG = false;
/** Creates a new instance of StringLengthValidator */
public StringLengthValidator() {
}
/**
* Creates a new instance of StringLengthValidator.
* @param max The maximum number of characters allowed in the string
*/
public StringLengthValidator(int max) {
maxLength = max;
}
/**
* Creates a new instance of StringLengthValidator.
* @param max The maximum number of characters allowed in the string
* @param min The minimum number of characters allowed in the string
*/
public StringLengthValidator(int max, int min) {
this(max);
minLength = min;
minimumSet = true;
}
/**
* Validate the value with regard to a UIComponent and a
* FacesContext.
*
* @param context The FacesContext
* @param component The component to be validated
* @param value The submitted value of the component
*
* @exception ValidatorException if the value is not valid
*/
public void validate(FacesContext context,
UIComponent component,
Object value) throws ValidatorException {
if (DEBUG) {
log("validate(" + String.valueOf(value) + ")");
}
if ((context == null) || (component == null)) {
if (DEBUG) {
log("\tContext or component is null");
}
throw new NullPointerException();
}
String string;
if (value == null) {
if (DEBUG) {
log("\tValue is null!");
}
string = new String();
} else {
string = (String) value;
}
if (DEBUG) {
log("\tValue is !" + string + "!");
}
if (string.length() > maxLength) {
if (DEBUG) {
log("\tString is longer than maxlength");
}
if (tooLongMessage == null) {
Theme theme = ThemeUtilities.getTheme(context);
tooLongMessage = theme.getMessage("StringLengthValidator.itemTooLong");
}
MessageFormat mf =
new MessageFormat(tooLongMessage,
context.getViewRoot().getLocale());
Object[] params = {String.valueOf(maxLength)};
FacesMessage msg = new FacesMessage(mf.format(params));
throw new ValidatorException(msg);
}
if (minimumSet && string.length() < minLength) {
if (DEBUG) {
log("\tString is shorter than minlength");
}
if (tooShortMessage == null) {
Theme theme = ThemeUtilities.getTheme(context);
tooShortMessage = theme.getMessage("StringLengthValidator.itemTooLong");
}
MessageFormat mf =
new MessageFormat(tooShortMessage,
context.getViewRoot().getLocale());
Object[] params = {String.valueOf(minLength)};
FacesMessage msg = new FacesMessage(mf.format(params));
throw new ValidatorException(msg);
}
}
private String integerToString(UIComponent component, Integer toConvert) {
String result = null;
Converter converter = null;
FacesContext context = FacesContext.getCurrentInstance();
converter = (Converter) context.getApplication().createConverter("javax.faces.Number");
result = converter.getAsString(context, component, toConvert);
return result;
}
/**
* Saves the state of the component into an object
* @param context the FacesContext
* @return the Object representing the state of the component
*/
public Object saveState(FacesContext context) {
Object values[] = new Object[5];
values[0] = new Integer(maxLength);
values[1] = new Integer(minLength);
values[2] = minimumSet ? Boolean.TRUE : Boolean.FALSE;
values[3] = tooLongMessage;
values[4] = tooShortMessage;
return (values);
}
/**
* Restore the state of the component.
* @param context The FacesContext
* @param state the Object representing the state of the component
*/
public void restoreState(FacesContext context, Object state) {
Object values[] = (Object[]) state;
maxLength = ((Integer) values[0]).intValue();
minLength = ((Integer) values[1]).intValue();
minimumSet = ((Boolean) values[2]).booleanValue();
if (values[3] != null) {
tooLongMessage = values[3].toString();
}
if (values[4] != null) {
tooShortMessage = values[4].toString();
}
}
private boolean transientValue = false;
/**
* Returns false, this component needs to save state.
* @return false
*/
public boolean isTransient() {
return false;
}
/**
* Does nothing
*/
public void setTransient(boolean transientValue) {
return;
}
/**
* Get the message to be used if the string is longer than the maxmimum number of characters.
* @return the message to be used if the string is longer than the maxmimum number of characters
*/
public String getTooLongMessage() {
return this.tooLongMessage;
}
/**
* Set the message to be used if the string is longer than the maximum number of characters.
* @param tooLongMessage the message to be used if the string is longer than the maxmimum number of characters
*/
public void setTooLongMessage(String tooLongMessage) {
this.tooLongMessage = tooLongMessage;
}
/**
* Get the message to be used if the string is shorter than the minimum number of characters.
* @return the message to be used if the string is shorter than the minimum number of characters
*/
public String getTooShortMessage() {
return this.tooShortMessage;
}
/**
* Set the message to be used if the string is shorter than the minimum number of characters.
* @param tooShortMessage the message to be used if the string is shorter than the minimum number of characters
*/
public void setTooShortMessage(String tooShortMessage) {
this.tooShortMessage = tooShortMessage;
}
private void log(String s) {
System.out.println(this.getClass().getName() + "::" + s); //NOI18N
}
}
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