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/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.lang;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Iterator;
/**
* @author Drew Noakes https://drewnoakes.com
*/
public final class StringUtil
{
@NotNull
public static String join(@NotNull Iterable<? extends CharSequence> strings, @NotNull String delimiter)
{
int capacity = 0;
int delimLength = delimiter.length();
Iterator<? extends CharSequence> iter = strings.iterator();
if (iter.hasNext())
capacity += iter.next().length() + delimLength;
StringBuilder buffer = new StringBuilder(capacity);
iter = strings.iterator();
if (iter.hasNext()) {
buffer.append(iter.next());
while (iter.hasNext()) {
buffer.append(delimiter);
buffer.append(iter.next());
}
}
return buffer.toString();
}
@NotNull
public static <T extends CharSequence> String join(@NotNull T[] strings, @NotNull String delimiter)
{
int capacity = 0;
int delimLength = delimiter.length();
for (T value : strings)
capacity += value.length() + delimLength;
StringBuilder buffer = new StringBuilder(capacity);
boolean first = true;
for (T value : strings) {
if (!first) {
buffer.append(delimiter);
} else {
first = false;
}
buffer.append(value);
}
return buffer.toString();
}
@NotNull
public static String fromStream(@NotNull InputStream stream) throws IOException
{
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
return sb.toString();
}
public static int compare(@Nullable String s1, @Nullable String s2)
{
boolean null1 = s1 == null;
boolean null2 = s2 == null;
if (null1 && null2) {
return 0;
} else if (null1) {
return -1;
} else if (null2) {
return 1;
} else {
return s1.compareTo(s2);
}
}
@NotNull
public static String urlEncode(@NotNull String name)
{
// Sufficient for now, it seems
return name.replace(" ", "%20");
}
}
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