Here you can find the source of stringPositions(StringBuilder toTest, Stream
| Parameter | Description |
|---|---|
| toTest | the StringBuilder being tested |
| strings | the strings being tested for |
static Stream<Integer> stringPositions(StringBuilder toTest, Stream<String> strings)
//package com.java2s;
/*/* w w w. j a v a2s . co m*/
* Copyright 2017 Johns Hopkins University
*
* Licensed 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.
*/
import java.util.stream.Stream;
public class Main {
/**
* Tests the supplied {@code StringBuilder} for the presence of {@code strings}, and returns the positions of
* matching characters.
*
* @param toTest the {@code StringBuilder} being tested
* @param strings the strings being tested for
* @return a {@code Stream<Integer>} containing the positions (zero-indexed) of the characters matched by the
* {@code strings}
*/
static Stream<Integer> stringPositions(StringBuilder toTest, Stream<String> strings) {
if (toTest == null) {
throw new IllegalArgumentException("StringBuilder must not be null.");
}
if (strings == null) {
throw new IllegalArgumentException("Invalid strings must not be null");
}
Stream.Builder<Integer> positionStream = Stream.builder();
strings.forEach(invalidString -> {
int index = -1;
while ((index = toTest.indexOf(invalidString, index)) > -1) {
int endIndex = -1;
for (int i = index; i < (index + invalidString.length()); i++) {
positionStream.accept(i);
endIndex = i;
}
index = endIndex + 1;
}
});
return positionStream.build();
}
}