move PackagePartClassUtils to frontend.common-psi

^KT-53097

compiler/frontend.java/src/org/jetbrains/kotlin/load/kotlin/PackagePartClassUtils.kt

@@ -1,65 +0,0 @@
-/*
- * Copyright 2010-2015 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 org.jetbrains.kotlin.load.kotlin
-
-import com.intellij.openapi.util.io.FileUtil
-import com.intellij.openapi.vfs.VirtualFile
-import org.jetbrains.annotations.TestOnly
-import org.jetbrains.kotlin.idea.KotlinFileType
-import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.name.NameUtils
-import org.jetbrains.kotlin.psi.KtFile
-import java.util.*
-
-object PackagePartClassUtils {
-    @JvmStatic fun getPathHashCode(file: VirtualFile): Int =
-            file.path.lowercase().hashCode()
-
-    private val PART_CLASS_NAME_SUFFIX = "Kt"
-
-    private @JvmStatic fun decapitalizeAsJavaClassName(str: String): String =
-            // NB use Locale.ENGLISH so that build is locale-independent.
-            // See Javadoc on java.lang.String.toUpperCase() for more details.
-            when {
-                Character.isJavaIdentifierStart(str[0]) -> str.substring(0, 1).lowercase() + str.substring(1)
-                str[0] == '_' -> str.substring(1)
-                else -> str
-            }
-
-    @TestOnly
-    @JvmStatic fun getDefaultPartFqName(facadeClassFqName: FqName, file: VirtualFile): FqName =
-            getPackagePartFqName(facadeClassFqName.parent(), file.name)
-
-    @JvmStatic fun getPackagePartFqName(packageFqName: FqName, fileName: String): FqName {
-        val partClassName = getFilePartShortName(fileName)
-        return packageFqName.child(Name.identifier(partClassName))
-    }
-
-    @JvmStatic fun getFilesWithCallables(files: Collection<KtFile>): List<KtFile> =
-            files.filter { it.hasTopLevelCallables() }
-
-    @JvmStatic fun getFilePartShortName(fileName: String): String =
-            NameUtils.getPackagePartClassNamePrefix(FileUtil.getNameWithoutExtension(fileName)) + PART_CLASS_NAME_SUFFIX
-
-    @JvmStatic fun getFileNameByFacadeName(facadeClassName: String): String? {
-        if (!facadeClassName.endsWith(PART_CLASS_NAME_SUFFIX)) return null
-        val baseName = facadeClassName.substring(0, facadeClassName.length - PART_CLASS_NAME_SUFFIX.length)
-        if (baseName == "_") return null
-        return "${decapitalizeAsJavaClassName(baseName)}.${KotlinFileType.EXTENSION}"
-    }
-}