/*
* Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.eclipse.cloudformation.validators;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclipse.core.databinding.validation.IValidator;
import org.eclipse.core.databinding.validation.ValidationStatus;
import org.eclipse.core.runtime.IStatus;
/**
* A set of {@link #org.eclipse.core.databinding.validation.IValidator} for validating AWS CloudFormation template parameters.
*/
public class TemplateParameterValidators {
public static IValidator newPatternValidator(final Pattern pattern, final String errorMessage) {
return new IValidator() {
@Override
public IStatus validate(Object value) {
Matcher matcher = pattern.matcher((CharSequence) value);
if ( matcher.matches() ) {
return ValidationStatus.ok();
} else {
return ValidationStatus.error(errorMessage);
}
}
};
}
public static IValidator newMaxLengthValidator(final int maxLength, final String fieldName) {
return new IValidator() {
@Override
public IStatus validate(Object value) {
if ( ((String) value).length() > maxLength ) {
return ValidationStatus.error(fieldName + " must be at most " + maxLength + " characters long");
} else {
return ValidationStatus.ok();
}
}
};
}
public static IValidator newMinLengthValidator(final int minLength, final String fieldName) {
return new IValidator() {
@Override
public IStatus validate(Object value) {
if ( ((String) value).length() < minLength ) {
return ValidationStatus.error(fieldName + " must be at least " + minLength + " characters long");
} else {
return ValidationStatus.ok();
}
}
};
}
public static IValidator newMinValueValidator(final int minValue, final String fieldName) {
return new IValidator() {
@Override
public IStatus validate(Object value) {
String string = (String) value;
try {
if ( Integer.parseInt(string) < minValue ) {
return ValidationStatus.error(fieldName + " must be at least " + minValue);
} else {
return ValidationStatus.ok();
}
} catch ( Exception e ) {
return ValidationStatus.error(fieldName + " must be at least " + minValue);
}
}
};
}
public static IValidator newMaxValueValidator(final int maxValue, final String fieldName) {
return new IValidator() {
@Override
public IStatus validate(Object value) {
String string = (String) value;
try {
if ( Integer.parseInt(string) > maxValue ) {
return ValidationStatus.error(fieldName + " must be at most " + maxValue);
} else {
return ValidationStatus.ok();
}
} catch ( Exception e ) {
return ValidationStatus.error(fieldName + " must be at most " + maxValue);
}
}
};
}
}