39 lines
1.2 KiB
Kotlin
39 lines
1.2 KiB
Kotlin
/*
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* Copyright 2016 Christian Basler
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package ch.dissem.apps.abit.util
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import java.util.regex.Pattern
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/**
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* @author Christian Basler
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*/
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object Strings {
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private val WHITESPACES = Pattern.compile("\\s+")
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private fun trim(string: CharSequence?, length: Int) = when {
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string == null -> ""
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string.length <= length -> string
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else -> string.subSequence(0, length)
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}
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/**
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* Trim the string to 200 characters and normalizes all whitespaces by replacing any sequence
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* of whitespace characters with a single space character.
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*/
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fun prepareMessageExtract(string: CharSequence?): String = WHITESPACES.matcher(trim(string, 200)).replaceAll(" ")
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}
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