nz.net.ultraq.thymeleaf.fragments.FragmentParameterNamesExtractor.groovy Maven / Gradle / Ivy
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A dialect for Thymeleaf that allows you to use layout/decorator templates to style your content.
/*
* Copyright 2016, Emanuel Rabina (http://www.ultraq.net.nz/)
*
* 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 nz.net.ultraq.thymeleaf.fragments
import java.util.regex.Pattern
/**
* Extracts just the parameter names from a fragment definition. Used for when
* unnamed fragment parameters need to be mapped to their respective names.
*
* @author Emanuel Rabina
*/
class FragmentParameterNamesExtractor {
private static final Pattern FRAGMENT_WITH_PARAMETERS_PATTERN = ~/.*?\(.*\)/
/**
* Returns a list of parameter names for the given fragment definition.
*
* @param fragmentDefinition
* @return A list of the named parameters, in the order they are defined.
*/
List extract(String fragmentDefinition) {
def parameterNames = []
if (fragmentDefinition.matches(FRAGMENT_WITH_PARAMETERS_PATTERN)) {
def parametersDefinition = fragmentDefinition.substring(
fragmentDefinition.indexOf('(') + 1, fragmentDefinition.lastIndexOf(')'))
parameterNames = parametersDefinition.split(',').collect { parameter ->
return parameter.contains('=') ? parameter.substring(0, parameter.indexOf('=')).trim() : parameter.trim()
}
}
return parameterNames
}
}