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The module for FunctionalJ Core.
// ============================================================================
// Copyright (c) 2017-2019 Nawapunth Manusitthipol (NawaMan - http://nawaman.net).
// ----------------------------------------------------------------------------
// MIT License
//
// 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 functionalj.functions;
import static functionalj.function.Absent.__;
import java.text.MessageFormat;
import java.util.Iterator;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.StreamSupport;
import functionalj.function.Func;
import functionalj.function.Func1;
import functionalj.function.Func2;
import functionalj.function.Func3;
import functionalj.function.Func4;
import functionalj.function.Func5;
import functionalj.function.Func6;
import functionalj.stream.StreamPlus;
import lombok.val;
// TODO - Should only contains methods that return functions or constance of functions
@SuppressWarnings("javadoc")
public class StrFuncs {
@SuppressWarnings("unused")
private static final Map indentTabs = new ConcurrentHashMap<>();
/**
* Return the string representation of the given object or null if the object is null.
*
* @param inputObject the input objects.
* @return the string representation of the input object.
*/
public static String toStr(Object inputObject) {
return (inputObject == null) ? null : String.valueOf(inputObject);
}
public static boolean isEmpty(String str) {
return (str == null) || str.isEmpty();
}
public static boolean isBlank(String str) {
return (str == null) || str.isEmpty() || str.trim().isEmpty();
}
/**
* Returns a function that return the string representation of the given object or null if the object is null.
*
* @param the input data type.
* @return the function.
*/
public static Func1 toStr() {
return (i) -> toStr(i);
}
/**
* Returns a predicate to check if the given string is not null and not empty.
*
* @return the predicate.
*/
public static Predicate strNotNullOrEmpty() {
return str -> (str != null) && !str.isEmpty();
}
public static Func2 concat2() {
return (i1, i2) -> toStr(i1) + toStr(i2);
}
public static Func3 concat3() {
return (i1, i2, i3) -> toStr(i1) + toStr(i2) + toStr(i3);
}
public static Func4 concat4() {
return (i1, i2, i3, i4) -> toStr(i1) + toStr(i2) + toStr(i3) + toStr(i4);
}
public static Func5 concat5() {
return (i1, i2, i3, i4, i5) -> toStr(i1) + toStr(i2) + toStr(i3) + toStr(i4) + toStr(i5);
}
public static Func6 concat6() {
return (i1, i2, i3, i4, i5, i6) -> toStr(i1) + toStr(i2) + toStr(i3) + toStr(i4) + toStr(i5) + toStr(i6);
}
public static Func2 join2(String delimiter) {
return (i1, i2) ->
toStr(i1) + delimiter +
toStr(i2);
}
public static Func3 join3(String delimiter) {
return (i1, i2, i3) ->
toStr(i1) + delimiter +
toStr(i2) + delimiter +
toStr(i3);
}
public static Func4 join4(String delimiter) {
return (i1, i2, i3, i4) ->
toStr(i1) + delimiter +
toStr(i2) + delimiter +
toStr(i3) + delimiter +
toStr(i4);
}
public static Func5 join5(String delimiter) {
return (i1, i2, i3, i4, i5) ->
toStr(i1) + delimiter +
toStr(i2) + delimiter +
toStr(i3) + delimiter +
toStr(i4) + delimiter +
toStr(i5);
}
public static Func6 join6(String delimiter) {
return (i1, i2, i3, i4, i5, i6) ->
toStr(i1) + delimiter +
toStr(i2) + delimiter +
toStr(i3) + delimiter +
toStr(i4) + delimiter +
toStr(i5) + delimiter +
toStr(i6);
}
/**
* Returns a function that add prefix and suffix to the given input.
*
* @param the input data type.
* @param prefix the prefix.
* @param suffix the suffix.
* @return the function.
*/
@SuppressWarnings("unchecked")
public static Func1 wrapWith(String prefix, String suffix) {
return (Func1)concat3().bind(prefix, __, suffix);
}
/**
* Returns a function that add prefix to the given input.
*
* @param the input data type.
* @param prefix the prefix.
* @return the function.
*/
@SuppressWarnings("unchecked")
public static Func1 prependWith(String prefix) {
return (Func1)concat3().bind(prefix, __, "");
}
/**
* Returns a function that add suffix to the given input.
*
* @param the input data type.
* @param suffix the suffix.
* @return the function.
*/
@SuppressWarnings("unchecked")
public static Func1 appendWith(String suffix) {
return (Func1)concat3().bind("", __, suffix);
}
public static Func1 withPrefix(String prefix) {
return input -> prefix + input;
}
public static Func1 withSuffix(String suffix) {
return input -> input + suffix;
}
public static Func1 withWrap(String prefix, String suffix) {
return input -> prefix + input + suffix;
}
public static Func1 withFormat(String format) {
return input -> String.format(format, input);
}
public static Func1 withFormat(MessageFormat format) {
return input -> format.format(input);
}
public static Func1 withPattern(Pattern pattern, String defaultValue) {
return input -> {
val inputStr = String.valueOf(input);
val matcher = pattern.matcher(inputStr);
return matcher.find()
? matcher.group()
: defaultValue;
};
}
public static Func1 withPattern(Pattern pattern, Supplier defaultValueSupplier) {
return input -> {
val inputStr = String.valueOf(input);
val matcher = pattern.matcher(inputStr);
return matcher.find()
? matcher.group()
: defaultValueSupplier.get();
};
}
public static Func1 withPattern(Pattern pattern, Function defaultValueFunction) {
return input -> {
val inputStr = String.valueOf(input);
val matcher = pattern.matcher(inputStr);
return matcher.find()
? matcher.group()
: defaultValueFunction.apply(inputStr);
};
}
public static Func1 withPath(Pattern pattern, BiFunction defaultValueFunction) {
return input -> {
val inputStr = String.valueOf(input);
val matcher = pattern.matcher(inputStr);
return matcher.find()
? matcher.group()
: defaultValueFunction.apply(inputStr, matcher);
};
}
public static Func1 formatWith1(String template) {
return (i1) -> String.format(template, i1);
}
public static Func2 formatWith2(String template) {
return (i1, i2) -> String.format(template, i1, i2);
}
public static Func3 formatWith3(String template) {
return (i1, i2, i3) -> String.format(template, i1, i2, i3);
}
public static Func4 formatWith4(String template) {
return (i1, i2, i3, i4) -> String.format(template, i1, i2, i3, i4);
}
public static Func5 formatWith5(String template) {
return (i1, i2, i3, i4, i5) -> String.format(template, i1, i2, i3, i4, i5);
}
public static Func6 formatWith6(String template) {
return (i1, i2, i3, i4, i5, i6) -> String.format(template, i1, i2, i3, i4, i5, i6);
}
public static Func2 strFormat1() {
return (template, i1) -> String.format(template, i1);
}
public static Func3 strFormat2() {
return (template, i1, i2) -> String.format(template, i1, i2);
}
public static Func4 strFormat3() {
return (template, i1, i2, i3) -> String.format(template, i1, i2, i3);
}
public static Func5 strFormat4() {
return (template, i1, i2, i3, i4) -> String.format(template, i1, i2, i3, i4);
}
public static Func6 strFormat5() {
return (template, i1, i2, i3, i4, i5) -> String.format(template, i1, i2, i3, i4, i5);
}
// TODO Rethink this at some point ..... should this be constance when no generic?
public static Func3 replaceAll() {
return (str, regex, replacement) -> str.replaceAll(regex, replacement);
}
public static Func1 replaceAll(String regex, String replacement) {
return (str) -> str.replaceAll(regex, replacement);
}
public static String repeat(char chr, int count) {
if (count <= 0)
return "";
val buffer = new StringBuffer();
for (int i = 0; i < count; i++)
buffer.append(chr);
return buffer.toString();
}
public static String repeat(String str, int count) {
if (count <= 0)
return "";
val buffer = new StringBuffer();
for (int i = 0; i < count; i++)
buffer.append(str);
return buffer.toString();
}
public static StreamPlus split(String str, String regexDelimiter) {
return split((CharSequence)str, regexDelimiter, -1);
}
public static StreamPlus split(CharSequence str, String regexDelimiter) {
return split((CharSequence)str, regexDelimiter, -1);
}
public static StreamPlus split(String str, String regexDelimiter, RegExFlag flags) {
return split((CharSequence)str, regexDelimiter, (flags != null) ? flags.getIntValue() : -1);
}
public static StreamPlus split(CharSequence str, String regexDelimiter, RegExFlag flags) {
return split((CharSequence)str, regexDelimiter, (flags != null) ? flags.getIntValue() : -1);
}
public static StreamPlus split(String str, String regexDelimiter, int flags) {
return split((CharSequence)str, regexDelimiter, flags);
}
public static StreamPlus split(CharSequence str, String regexDelimiter, int flags) {
if (str == null || (str.length() == 0))
return StreamPlus.empty();
val pattern = (flags < 0) ? Pattern.compile(regexDelimiter) : Pattern.compile(regexDelimiter, flags);
val matcher = pattern.matcher(str);
val offset = new AtomicInteger(0);
val isLast = new AtomicReference(null);
Iterable iterable = new Iterable() {
@Override
public Iterator iterator() {
return new Iterator() {
@Override
public boolean hasNext() {
val find = matcher.find();
if (!find) {
if (isLast.get() == null) {
isLast.set(true);
return true;
} else {
return false;
}
}
return find;
}
@Override
public String next() {
val isLastBoolean = isLast.get();
if (isLastBoolean == null) {
val start = matcher.start();
val end = matcher.end();
val next = str.subSequence(offset.get(), start);
offset.set(end);
return next.toString();
}
if (isLastBoolean == true) {
val next = str.subSequence(offset.get(), str.length());
return next.toString();
}
return null;
}
};
}
};
return StreamPlus.from(StreamSupport.stream(iterable.spliterator(), false));
}
public static StreamPlus lines(String str) {
return split(str, "(\n|\r\n?)");
}
public static String indent(String str) {
if (str == null || str.isEmpty())
return "";
return "\t" + str.replaceAll("(\n|\r\n?)", "$1\t");
}
public static String leftPadding(String str, char prefix, int width) {
if (str == null || str.isEmpty())
return repeat(prefix, width);
if (str.length() >= prefix)
return str;
return repeat(prefix, width - str.length()) + str;
}
public static Func1 matches(String regex) {
return str -> matches(str, regex, -1);
}
public static Func1 matches(String regex, RegExFlag flags) {
return str -> matches(str, regex, flags);
}
public static Func1 matches(String regex, int flags) {
return str -> matches(str, regex, flags);
}
public static RegExMatchResultStream matches(CharSequence str, String regex) {
return matches(str, regex, -1);
}
public static RegExMatchResultStream matches(CharSequence str, String regex, RegExFlag flags) {
return matches(str, regex, flags);
}
public static RegExMatchResultStream matches(CharSequence str, String regex, int flags) {
if (str == null || (str.length() == 0))
return RegExMatchResultStream.empty;
val pattern = (flags < 0) ? Pattern.compile(regex) : Pattern.compile(regex, flags);
val matcher = pattern.matcher(str);
val source = Func.lazy(()->str.toString());
val index = new AtomicInteger();
Iterable iterable = new Iterable() {
@Override
public Iterator iterator() {
return new Iterator() {
@Override
public boolean hasNext() {
return matcher.find();
}
@Override
public RegExMatchResult next() {
return new RegExMatchResult(source, pattern, index.get(), matcher.toMatchResult());
}
};
}
};
return RegExMatchResultStream.from(StreamSupport.stream(iterable.spliterator(), false));
}
public static String template(String str, Func1 replacer) {
return template((CharSequence)str, replacer);
}
public static String template(CharSequence str, Func1 replacer) {
if (str == null)
return null;
if (str == null || (str.length() == 0))
return "";
StringBuffer buffer = new StringBuffer();
val flags = 0;
val pattern = Pattern.compile("\\$[a-zA-Z0-9_]++", flags);
val matcher = pattern.matcher(str);
while (matcher.find()) {
val group = matcher.group();
val name = group.substring(1, group.length());
val replacement = String.valueOf(replacer.apply(name));
matcher.appendReplacement(buffer, replacement);
}
matcher.appendTail(buffer);
return buffer.toString();
}
}