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// Copyright (C) 2009 The Android Open Source Project
//
// 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.google.gimd.jgit
import com.google.gimd.Snapshot
import com.google.gimd.file.{File, FileType}
import org.spearce.jgit.lib.{Repository, FileMode}
import org.spearce.jgit.revwalk.RevCommit
import org.spearce.jgit.treewalk.filter.{PathFilter, PathSuffixFilter, AndTreeFilter, TreeFilter}
import org.spearce.jgit.treewalk.TreeWalk
final class JGitSnapshot(val branch: JGitBranch, val commit: RevCommit) extends Snapshot {
def all[T](fileType: FileType[T]): Iterator[File[T]] = {
val treeWalk = new TreeWalk(branch.repository)
treeWalk.reset(commit.getTree)
treeWalk.setRecursive(true)
treeWalk.setFilter(treeFilter(fileType))
val fileIterator = new Iterator[File[T]] {
private var doesHasNext = treeWalk.next
def hasNext = doesHasNext
def next = {
if (!hasNext)
throw new NoSuchElementException
val result =
new JGitFile(treeWalk.getPathString, treeWalk.getObjectId(0), fileType, branch)
doesHasNext = treeWalk.next
result
}
}
fileIterator
}
private def treeFilter[T](fileType: FileType[T]): TreeFilter =
AndTreeFilter.create(
Array(
RegularFileFilter,
fileType.pathPrefix.map(PathFilter.create(_)).getOrElse(TreeFilter.ALL),
fileType.pathSuffix.map(PathSuffixFilter.create(_)).getOrElse(TreeFilter.ALL)
)
)
private object RegularFileFilter extends TreeFilter {
def shouldBeRecursive = false
def include(treeWalk: TreeWalk) =
treeWalk.isSubtree || FileMode.REGULAR_FILE.equals(treeWalk.getFileMode(0))
override def clone = this
}
}
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