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src.main.java.com.dd.plist.NSString Maven / Gradle / Ivy
/*
* plist - An open source library to parse and generate property lists
* Copyright (C) 2011 Daniel Dreibrodt
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.dd.plist;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
import java.util.Scanner;
/**
* The NSString class is a wrapper for a string.
*
* @author Daniel Dreibrodt
* @see Foundation NSString documentation
*/
public class NSString extends NSObject implements Comparable {
private static CharsetEncoder asciiEncoder, utf16beEncoder, utf8Encoder;
private String content;
/**
* Creates a new NSString instance from its binary representation.
*
* @param bytes The binary representation.
* @param encoding The string encoding (name of the charset).
* @throws UnsupportedEncodingException When the given encoding is not supported by the JRE.
* @see java.lang.String#String(byte[], String)
*/
public NSString(byte[] bytes, String encoding) throws UnsupportedEncodingException {
this(bytes, 0, bytes.length, encoding);
}
/**
* Creates a new NSString instance from its binary representation.
*
* @param bytes An array containing the binary representation of the string.
* @param startIndex The offset inside the array at which the string data starts.
* @param endIndex The offset inside the array at which the string data ends.
* @param encoding The string encoding (name of the charset).
* @throws UnsupportedEncodingException When the given encoding is not supported by the JRE.
* @see java.lang.String#String(byte[], int, int, String)
*/
public NSString(byte[] bytes, final int startIndex, final int endIndex, String encoding) throws UnsupportedEncodingException {
this.content = new String(bytes, startIndex, endIndex - startIndex, encoding);
}
/**
* Creates a new NSString instance with the specified content.
*
* @param string The string that will be contained in the NSString.
*/
public NSString(String string) {
this.content = string;
}
/**
* Gets the integer value of this string.
*
* @return The integer value of this string, assuming a decimal representation
* and skipping whitespace at the beginning of the string. If the string
* does not contain a valid decimal representation of a number, 0 is returned.
* If the string contains an integer larger than Integer.MAX_VALUE, Integer.MAX_VALUE is returned.
* If the string contains an integer less than Integer.MIN_VALUE, Integer.MIN_VALUE is returned.
*/
public int intValue() {
double d = this.doubleValue();
if (d > Integer.MAX_VALUE) {
return Integer.MAX_VALUE;
}
if (d < Integer.MIN_VALUE) {
return Integer.MIN_VALUE;
}
return (int)d;
}
/**
* Gets the floating-point value of this string.
*
* @return The floating-point value of this string, assuming a decimal representation
* and skipping whitespace at the beginning of the string. If the string
* does not contain a valid decimal representation of a number, 0 is returned.
* If the string contains an integer larger than Float.MAX_VALUE, Float.MAX_VALUE is returned.
* If the string contains an integer less than -Float.MAX_VALUE, -Float.MAX_VALUE is returned.
*/
public float floatValue() {
double d = this.doubleValue();
if (d > Float.MAX_VALUE) {
return Float.MAX_VALUE;
}
if (d < -Float.MAX_VALUE) {
return -Float.MAX_VALUE;
}
return (float)d;
}
/**
* Gets the floating-point value (double precision) of this string.
*
* @return The floating-point value of this string, assuming a decimal representation
* and skipping whitespace at the beginning of the string. If the string does not contain
* a valid decimal representation of a floating-point number, 0 is returned.
*/
public double doubleValue() {
Scanner s = new Scanner(this.content.trim()).useLocale(Locale.ROOT).useDelimiter("[^\\d.+-]+");
if(s.hasNextDouble()) {
return s.nextDouble();
}
else {
return 0d;
}
}
/**
* Gets the boolean value of this string.
*
* @return The boolean value of this string. Leading whitespaces are ignored. Any + or - sign and leading zeroes are
* ignored.
* If the remaining string starts with 'Y', 'y', 'T', 't' or a positive digit (1-9), true is returned.
* Otherwise, false is returned.
*
* Examples:
* "YES" is true
* "true" is true
* " YES" is true
* "+1" is true
* "-9" is true
* " +01" is true
* "0" is false
* "false" is false
* "no" is false
* "1FALSE" is true
* "0TRUE" is true
* "FALSE1" is false
*/
public boolean boolValue() {
Scanner s = new Scanner(this.content.trim()).useLocale(Locale.ROOT);
return s.hasNext("([+-]?0*)?[YyTt1-9].*");
}
/**
* Gets the string content of this instance.
*
* @return This string contained in this instance.
*/
public String getContent() {
return this.content;
}
/**
* Sets the string content of this instance.
*
* @param c The new content of this string object.
*/
public void setContent(String c) {
this.content = c;
}
/**
* Appends a string to this string.
*
* @param s The string to append.
*/
public void append(NSString s) {
this.append(s.getContent());
}
/**
* Appends a string to this string.
*
* @param s The string to append.
*/
public void append(String s) {
this.content += s;
}
/**
* Prepends a string to this string.
*
* @param s The string to prepend.
*/
public void prepend(String s) {
this.content = s + this.content;
}
/**
* Prepends a string to this string.
*
* @param s The string to prepend.
*/
public void prepend(NSString s) {
this.prepend(s.getContent());
}
@Override
public boolean equals(Object obj) {
return obj != null && this.getClass() == obj.getClass() && this.content.equals(((NSString) obj).content);
}
@Override
public int hashCode() {
return this.content.hashCode();
}
@Override
public String toString() {
return this.content;
}
@Override
public NSString clone() {
return new NSString(this.content);
}
@Override
void toXML(StringBuilder xml, int level) {
this.indent(xml, level);
xml.append("");
//Make sure that the string is encoded in UTF-8 for the XML output
synchronized (NSString.class) {
if (utf8Encoder == null)
utf8Encoder = StandardCharsets.UTF_8.newEncoder();
else
utf8Encoder.reset();
try {
ByteBuffer byteBuf = utf8Encoder.encode(CharBuffer.wrap(this.content));
byte[] bytes = new byte[byteBuf.remaining()];
byteBuf.get(bytes);
this.content = new String(bytes, StandardCharsets.UTF_8);
} catch (Exception ex) {
throw new RuntimeException("Could not encode the NSString into UTF-8: " + ex.getMessage());
}
}
String cleanedContent = escapeStringForXml(this.content);
//According to http://www.w3.org/TR/REC-xml/#syntax node values must not
//contain the characters < or &. Also the > character should be escaped.
if (cleanedContent.contains("&") || cleanedContent.contains("<") || cleanedContent.contains(">")) {
xml.append("", "]]]]>"));
xml.append("]]>");
} else {
xml.append(cleanedContent);
}
xml.append(" ");
}
@Override
public void toBinary(BinaryPropertyListWriter out) throws IOException {
CharBuffer charBuf = CharBuffer.wrap(this.content);
int kind;
ByteBuffer byteBuf;
synchronized (NSString.class) {
if (asciiEncoder == null)
asciiEncoder = StandardCharsets.US_ASCII.newEncoder();
else
asciiEncoder.reset();
if (asciiEncoder.canEncode(charBuf)) {
kind = 0x5; // standard ASCII
byteBuf = asciiEncoder.encode(charBuf);
} else {
if (utf16beEncoder == null)
utf16beEncoder = StandardCharsets.UTF_16BE.newEncoder();
else
utf16beEncoder.reset();
kind = 0x6; // UTF-16-BE
byteBuf = utf16beEncoder.encode(charBuf);
}
}
byte[] bytes = new byte[byteBuf.remaining()];
byteBuf.get(bytes);
out.writeIntHeader(kind, this.content.length());
out.write(bytes);
}
@Override
protected void toASCII(StringBuilder ascii, int level) {
this.indent(ascii, level);
ascii.append("\"");
//According to https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/PropertyLists/OldStylePlists/OldStylePLists.html
//non-ASCII characters are not escaped but simply written into the
//file, thus actually violating the ASCII plain text format.
//We will escape the string anyway because current Xcode project files (ASCII property lists) also escape their strings.
ascii.append(escapeStringForASCII(this.content));
ascii.append("\"");
}
@Override
protected void toASCIIGnuStep(StringBuilder ascii, int level) {
this.indent(ascii, level);
ascii.append("\"");
ascii.append(escapeStringForASCII(this.content));
ascii.append("\"");
}
public int compareTo(Object o) {
if (o instanceof NSString) {
return this.getContent().compareTo(((NSString) o).getContent());
} else if (o instanceof String) {
return this.getContent().compareTo((String) o);
} else {
return -1;
}
}
/**
* Escapes a string for use in ASCII property lists.
*
* @param s The unescaped string.
* @return The escaped string.
*/
static String escapeStringForASCII(String s) {
StringBuilder out = new StringBuilder();
for(char c : s.toCharArray()) {
if(c > 127) {
//non-ASCII Unicode
out.append("\\U");
String hex = Integer.toHexString(c);
while(hex.length() < 4)
hex = "0" + hex;
out.append(hex);
} else if(c == '\\') {
out.append("\\\\");
} else if(c == '\"') {
out.append("\\\"");
} else if(c == '\b') {
out.append("\\b");
} else if(c == '\n') {
out.append("\\n");
} else if(c == '\r') {
out.append("\\r");
} else if(c == '\t') {
out.append("\\t");
} else {
out.append(c);
}
}
return out.toString();
}
static String escapeStringForXml(String s) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
int codePoint = s.codePointAt(i);
if (codePoint > 0xFFFF) {
i++;
}
if ((codePoint == 0x9) || (codePoint == 0xA) || (codePoint == 0xD)
|| ((codePoint >= 0x20) && (codePoint <= 0xD7FF))
|| ((codePoint >= 0xE000) && (codePoint <= 0xFFFD))
|| ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF))) {
sb.appendCodePoint(codePoint);
}
}
return sb.toString();
}
}
