| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.daffodil.processors.unparsers |
| |
| import org.apache.daffodil.util.MaybeChar |
| |
| /** |
| * When dfdl:lengthKind is 'explicit' (and dfdl:length is an expression), |
| * 'delimited', 'prefixed', 'pattern' the data value is padded to the length given |
| * by the XSD minLength facet for type 'xs:string' or |
| * dfdl:textOutputMinLength property for other types. |
| * |
| * |
| * dfdl:textOutputMinLength: |
| * Only used when dfdl:textPadKind is 'padChar' and dfdl:lengthKind is |
| * 'delimited', 'prefixed', 'pattern', 'explicit' (when dfdl:length is an expression) |
| * or 'endOfParent', and type is not xs:string |
| * Specifies the minimum content length during unparsing for simple types |
| * that do not allow the XSD minLength facet to be specified. |
| * For dfdl:lengthKind 'delimited', 'pattern' and 'endOfParent' the length units |
| * are always characters, for other dfdl:lengthKinds the length units are |
| * specified by the dfdl:lengthUnits property. |
| * If dfdl:textOutputMinLength is zero or less than the length of the |
| * representation text then no padding occurs. |
| */ |
| trait PaddingRuntimeMixin { |
| |
| def pad: MaybeChar |
| def padToLength: Int |
| |
| def addRightPadding(str: String): String = { |
| val inputLength = str.length |
| |
| val res = |
| if (!pad.isDefined || padToLength < inputLength || padToLength == 0) { str } |
| else { |
| val numCharsToAdd = padToLength - inputLength |
| addRightPadding(str, numCharsToAdd) |
| } |
| res |
| } |
| |
| def addLeftPadding(str: String): String = { |
| val inputLength = str.length |
| |
| val res = |
| if (!pad.isDefined || padToLength < inputLength || padToLength == 0) { str } |
| else { |
| val numCharsToAdd = padToLength - inputLength |
| addLeftPadding(str, numCharsToAdd) |
| } |
| res |
| } |
| |
| def addPadding(str: String): String = { |
| val inputLength = str.length |
| |
| val res = if (!pad.isDefined || padToLength < inputLength || padToLength == 0) { str } |
| else { |
| val numCharsToAddTotal = padToLength - inputLength |
| val numAddToLeft = Math.ceil(numCharsToAddTotal / 2).toInt |
| val numAddToRight = numCharsToAddTotal - numAddToLeft |
| |
| addRightPadding(addLeftPadding(str, numAddToLeft), numAddToRight) |
| } |
| |
| res |
| } |
| |
| private def append(sb: StringBuilder, numCharsToAppend: Int): StringBuilder = { |
| for (i <- 1 to numCharsToAppend) { sb.append(pad.get) } |
| sb |
| } |
| |
| private def addRightPadding(str: String, numCharsToPad: Int): String = { |
| val sb = append(new StringBuilder(str), numCharsToPad) |
| sb.toString |
| } |
| private def addLeftPadding(str: String, numCharsToPad: Int): String = { |
| val sb = append(new StringBuilder, numCharsToPad) |
| sb.append(str) |
| sb.toString |
| } |
| |
| } |