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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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.
*/
package com.intellij.util;
import com.intellij.util.containers.ContainerUtilRt;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.File;
import java.util.Collection;
/**
* Stripped-down version of {@code com.intellij.util.ArrayUtil}.
* Intended to use by external (out-of-IDE-process) runners and helpers so it should not contain any library dependencies.
*
* @since 12.0
*/
@SuppressWarnings({"UtilityClassWithoutPrivateConstructor", "SSBasedInspection"})
public class ArrayUtilRt {
public static final short[] EMPTY_SHORT_ARRAY = new short[0];
public static final char[] EMPTY_CHAR_ARRAY = new char[0];
public static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
public static final int[] EMPTY_INT_ARRAY = new int[0];
public static final boolean[] EMPTY_BOOLEAN_ARRAY = new boolean[0];
public static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
public static final String[] EMPTY_STRING_ARRAY = new String[0];
public static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
public static final long[] EMPTY_LONG_ARRAY = new long[0];
public static final Collection[] EMPTY_COLLECTION_ARRAY = new Collection[0];
public static final File[] EMPTY_FILE_ARRAY = new File[0];
public static final Runnable[] EMPTY_RUNNABLE_ARRAY = new Runnable[0];
@NotNull
@Contract(pure=true)
public static String[] toStringArray(@Nullable Collection<String> collection) {
return collection == null || collection.isEmpty()
? EMPTY_STRING_ARRAY : ContainerUtilRt.toArray(collection, new String[collection.size()]);
}
/**
* @param src source array.
* @param obj object to be found.
* @return index of <code>obj</code> in the <code>src</code> array.
* Returns <code>-1</code> if passed object isn't found. This method uses
* <code>equals</code> of arrays elements to compare <code>obj</code> with
* these elements.
*/
@Contract(pure=true)
public static <T> int find(@NotNull final T[] src, final T obj) {
for (int i = 0; i < src.length; i++) {
final T o = src[i];
if (o == null) {
if (obj == null) {
return i;
}
}
else {
if (o.equals(obj)) {
return i;
}
}
}
return -1;
}
}
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