CustomTexBox.java

package com.andreiolar.abms.client.widgets;

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

import com.andreiolar.abms.shared.Validator;
import com.google.gwt.user.client.ui.TextBox;

public class CustomTexBox extends TextBox {

	private static final String TEXTBOX_VALIDATION_ERROR_STYLE = "error-text-box";
	private static final String TEXTBOX_VALIDATION_NO_ERROR = "no-error-text-box";
	private String errorMessage = "";
	private List<Validator> validators = new ArrayList<Validator>();

	@Override
	public void setStyleName(String style) {
		super.setStyleName(TEXTBOX_VALIDATION_NO_ERROR);
	}

	public CustomTexBox() {
	}

	public CustomTexBox(String name) {
		setName(name);
	}

	public String getErrorMessage() {
		return errorMessage;
	}

	public void setErrorMessage(String errorMessage) {
		this.errorMessage = errorMessage;
	}

	public void addValidator(Validator validator) {
		validators.add(validator);
	}

	public boolean validate() {
		boolean validationResult = true;

		for (Validator validator : validators) {
			validationResult = validator.validate(getValue().trim());

			if (!validationResult) {
				errorMessage = validator.getErrorMessage();
				break;
			}

			errorMessage = validator.getErrorMessage();
		}

		setErrorStyles(validationResult);

		return validationResult;
	}

	public void setErrorStyles(boolean validationResult) {
		if (validationResult) {
			removeStyleName(TEXTBOX_VALIDATION_ERROR_STYLE);
			setTitle("");
		} else {
			addStyleName(TEXTBOX_VALIDATION_ERROR_STYLE);
			setTitle(errorMessage);
		}
	}

	@Override
	public void setValue(String s) {
		removeStyleDependentName(TEXTBOX_VALIDATION_ERROR_STYLE);
		super.setValue(s);
	}

	@Override
	public String getValue() {
		return super.getValue().trim();
	}
}