/*******************************************************************************
* Copyright (c) 2007 Oracle Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Oracle - initial API and implementation
*
********************************************************************************/
package org.eclipse.jst.jsf.taglibprocessing.attributevalues;
/**
* Meta-data processing type representing an length attribute value runtime type.
* Does not support min and max values from MD. Length must be positive.
* that implements IValidValues, IDefaultValue, IValidELValues.
*/
public class LengthType extends IntegerType {
private static final String INVALID_LENGTH = Messages.LengthType_invalid_integer;
/**
* Type coercion according to JSP 2.0 spec: JSP.1.14.2.1 Conversions from String values
* Allows a percentage.
* @see org.eclipse.jst.jsf.metadataprocessors.features.IValidValues#isValidValue(java.lang.String)
**/
public boolean isValidValue(String value) {
//FIXME: this is not right... px, em, etc. are also valid... and spaces between # and units are not
//see http://www.w3.org/TR/html401/types.html#h-6.6
if (value == null) return true;
String aValue = stripPercentIfPresent(value);
try {
int anInt = Integer.valueOf(aValue).intValue();
if (anInt < 0)
addNewValidationMessage(INVALID_LENGTH);
return getValidationMessages().isEmpty();
} catch (NumberFormatException e) {
addNewValidationMessage(INVALID_LENGTH);
return false;
}
}
//will strip '%' if at end of string. If string is only '%', then will return empty which will be invalid.
private String stripPercentIfPresent(String value) {
//"%" is allowed at end
if (value.length() > 0
&& value.lastIndexOf('%') == value.length() - 1)
return value.replaceFirst("%",""); //$NON-NLS-1$ //$NON-NLS-2$
return value;
}
}