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ECIStringBuilder
This commit is contained in:
Henry Schimke
@@ -1,145 +0,0 @@
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/*
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* Copyright 2022 ZXing authors
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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 com.google.zxing.common;
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import com.google.zxing.FormatException;
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import java.nio.charset.Charset;
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import java.nio.charset.StandardCharsets;
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/**
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* Class that converts a sequence of ECIs and bytes into a string
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*
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* @author Alex Geller
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*/
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public final class ECIStringBuilder {
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private StringBuilder currentBytes;
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private StringBuilder result;
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private Charset currentCharset = StandardCharsets.ISO_8859_1;
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public ECIStringBuilder() {
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currentBytes = new StringBuilder();
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}
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public ECIStringBuilder(int initialCapacity) {
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currentBytes = new StringBuilder(initialCapacity);
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}
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/**
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* Appends {@code value} as a byte value
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*
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* @param value character whose lowest byte is to be appended
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*/
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public void append(char value) {
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currentBytes.append((char) (value & 0xff));
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}
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/**
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* Appends {@code value} as a byte value
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*
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* @param value byte to append
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*/
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public void append(byte value) {
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currentBytes.append((char) (value & 0xff));
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}
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/**
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* Appends the characters in {@code value} as bytes values
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*
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* @param value string to append
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*/
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public void append(String value) {
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currentBytes.append(value);
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}
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/**
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* Append the string repesentation of {@code value} (short for {@code append(String.valueOf(value))})
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*
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* @param value int to append as a string
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*/
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public void append(int value) {
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append(String.valueOf(value));
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}
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/**
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* Appends ECI value to output.
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*
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* @param value ECI value to append, as an int
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* @throws FormatException on invalid ECI value
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*/
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public void appendECI(int value) throws FormatException {
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encodeCurrentBytesIfAny();
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CharacterSetECI characterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
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if (characterSetECI == null) {
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throw FormatException.getFormatInstance();
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}
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currentCharset = characterSetECI.getCharset();
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}
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private void encodeCurrentBytesIfAny() {
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if (currentCharset.equals(StandardCharsets.ISO_8859_1)) {
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if (currentBytes.length() > 0) {
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if (result == null) {
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result = currentBytes;
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currentBytes = new StringBuilder();
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} else {
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result.append(currentBytes);
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currentBytes = new StringBuilder();
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}
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}
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} else if (currentBytes.length() > 0) {
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byte[] bytes = currentBytes.toString().getBytes(StandardCharsets.ISO_8859_1);
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currentBytes = new StringBuilder();
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if (result == null) {
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result = new StringBuilder(new String(bytes, currentCharset));
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} else {
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result.append(new String(bytes, currentCharset));
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}
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}
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}
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/**
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* Appends the characters from {@code value} (unlike all other append methods of this class who append bytes)
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*
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* @param value characters to append
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*/
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public void appendCharacters(StringBuilder value) {
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encodeCurrentBytesIfAny();
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result.append(value);
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}
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/**
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* Short for {@code toString().length()} (if possible, use {@link #isEmpty()} instead)
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*
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* @return length of string representation in characters
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*/
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public int length() {
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return toString().length();
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}
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/**
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* @return true iff nothing has been appended
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*/
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public boolean isEmpty() {
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return currentBytes.length() == 0 && (result == null || result.length() == 0);
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}
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@Override
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public String toString() {
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encodeCurrentBytesIfAny();
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return result == null ? "" : result.toString();
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}
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}
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@@ -2654,3 +2654,157 @@ impl CharacterSetECI {
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}
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/*
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* Copyright 2022 ZXing authors
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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 com.google.zxing.common;
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// import com.google.zxing.FormatException;
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// import java.nio.charset.Charset;
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// import java.nio.charset.StandardCharsets;
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/**
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* Class that converts a sequence of ECIs and bytes into a string
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*
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* @author Alex Geller
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*/
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pub struct ECIStringBuilder {
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current_bytes: Vec<u8>,
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result: String,
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current_charset : &'static dyn Encoding, //= StandardCharsets.ISO_8859_1;
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}
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impl ECIStringBuilder {
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pub fn new() -> Self{
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Self { current_bytes: Vec::new(), result: String::new(), current_charset: encoding::all::UTF_8 }
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}
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pub fn with_capacity( initial_capacity : usize) ->Self{
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Self { current_bytes: Vec::with_capacity(initial_capacity), result: String::new(), current_charset: encoding::all::ISO_8859_1 }
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}
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/**
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* Appends {@code value} as a byte value
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*
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* @param value character whose lowest byte is to be appended
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*/
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pub fn append_char(&mut self, value:char) {
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self.current_bytes.push( value as u8 );
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}
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/**
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* Appends {@code value} as a byte value
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*
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* @param value byte to append
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*/
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pub fn append_byte(&mut self, value:u8) {
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self.current_bytes.push( value );
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}
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/**
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* Appends the characters in {@code value} as bytes values
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*
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* @param value string to append
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*/
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pub fn append_string(&mut self, value :&str) {
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value.as_bytes().iter().map(|b| self.current_bytes.push(*b));
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// self.current_bytes.push(value.as_bytes());
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}
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/**
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* Append the string repesentation of {@code value} (short for {@code append(String.valueOf(value))})
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*
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* @param value int to append as a string
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*/
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pub fn append(&mut self, value:i32) {
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self.append_string(&format!("{}", value));
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}
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/**
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* Appends ECI value to output.
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*
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* @param value ECI value to append, as an int
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* @throws FormatException on invalid ECI value
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*/
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pub fn appendECI(&mut self, value:u32) -> Result<(),Exceptions> {
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self.encodeCurrentBytesIfAny();
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let character_set_eci = CharacterSetECI::getCharacterSetECIByValue(value)?;
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// if (character_set_eci == null) {
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// throw FormatException.getFormatInstance();
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// }
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self.current_charset = CharacterSetECI::getCharset(&character_set_eci);
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Ok(())
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}
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pub fn encodeCurrentBytesIfAny(&mut self) {
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if self.current_charset.name() == encoding::all::UTF_8.name() {
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if !self.current_bytes.is_empty() {
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// if result == null {
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// result = currentBytes;
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// currentBytes = new StringBuilder();
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// } else {
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self.result.push_str(&String::from_utf8(self.current_bytes.clone()).unwrap());
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self.current_bytes.clear();
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// }
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}
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} else if !self.current_bytes.is_empty() {
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let bytes = self.current_bytes.clone();
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self.current_bytes.clear();
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// if (result == null) {
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// result = new StringBuilder(new String(bytes, currentCharset));
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// } else {
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let encoded_value = self.current_charset.decode(&bytes, encoding::DecoderTrap::Replace).unwrap();
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self.result.push_str(&encoded_value);
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// }
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}
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}
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/**
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* Appends the characters from {@code value} (unlike all other append methods of this class who append bytes)
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*
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* @param value characters to append
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*/
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pub fn appendCharacters(&mut self, value:&str) {
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self.encodeCurrentBytesIfAny();
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self.result.push_str(value);
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}
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/**
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* Short for {@code toString().length()} (if possible, use {@link #isEmpty()} instead)
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*
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* @return length of string representation in characters
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*/
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pub fn len(&mut self) -> usize{
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self.encodeCurrentBytesIfAny();//return toString().length();
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self.result.len()
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}
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/**
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* @return true iff nothing has been appended
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*/
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pub fn is_empty(&self) -> bool{
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return self.current_bytes.is_empty() && self.result.is_empty();
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}
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}
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impl fmt::Display for ECIStringBuilder{
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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//self.encodeCurrentBytesIfAny();
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write!(f,"{}", self.result)
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}
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}
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