[JGIT PATCH 20/22] Added class FileIterableFactoryForAddCommand.

[Florian Koeberle <florianskarten@web.de>]

Signed-off-by: Florian Koeberle <florianskarten@web.de>
---
 .../FileIterableFactoryForAddCommand.java          |  118 ++++++++++++++++++++
 1 files changed, 118 insertions(+), 0 deletions(-)
 create mode 100644 org.spearce.jgit/src/org/spearce/jgit/lib/fileiteration/FileIterableFactoryForAddCommand.java

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/fileiteration/FileIterableFactoryForAddCommand.java b/org.spearce.jgit/src/org/spearce/jgit/lib/fileiteration/FileIterableFactoryForAddCommand.java
new file mode 100644
index 0000000..4674a87
--- /dev/null
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/fileiteration/FileIterableFactoryForAddCommand.java
@@ -0,0 +1,118 @@
+/*
+ *  Copyright (C) 2008 Florian Köberle
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public
+ *  License, version 2, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ */
+package org.spearce.jgit.lib.fileiteration;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.spearce.jgit.errors.InvalidPatternException;
+import org.spearce.jgit.errors.PathNotInProjectDirectoryException;
+import org.spearce.jgit.lib.GitPathConstants;
+import org.spearce.jgit.lib.Project;
+
+/**
+ * This class is designed to serve the needs of someone who want to implement a
+ * git-add command and needs to determine the files to add.
+ * 
+ * @author Florian Köberle
+ * 
+ */
+public class FileIterableFactoryForAddCommand {
+	private final RuleListToObjectConverter converter = new RuleListToObjectConverter();
+
+	private final IgnoreRuleListFactory ignoreRuleListFactory = new IgnoreRuleListFactory();
+
+	private final AddRuleListFactory addRuleListFactory = new AddRuleListFactory();
+
+	/**
+	 * @param project
+	 *            a git project.
+	 * @param projectSubDirectory
+	 *            a directory in the projectDirectory.
+	 * @param filePatternsOfAddCommand
+	 *            determines the files to iterate over.
+	 * @return an {@link Iterable} which can be used to iterate over all
+	 *         matching files in the project directory which are not ignored by
+	 *         some ignore rules.
+	 * @throws InvalidPatternException
+	 * @throws IOException
+	 *             for some reasons.
+	 * @throws PathNotInProjectDirectoryException
+	 *             if projectSubDirectory isn't a subdirectory of the project
+	 *             directory.
+	 */
+	public Iterable<File> createFileTreeIterable(Project project,
+			File projectSubDirectory, List<String> filePatternsOfAddCommand)
+			throws InvalidPatternException, PathNotInProjectDirectoryException,
+			IOException {
+		final File gitDirectory = project.getRepository().getDirectory();
+		final Rules rules = createRules(project.getDirectory(), gitDirectory,
+				projectSubDirectory, filePatternsOfAddCommand);
+		return new FileTreeIterable(project.getDirectory(), rules, false);
+	}
+
+	private Rules createRules(File projectDirectory, File gitDirectory,
+			File workingDirectory, List<String> filePatternsOfAddCommand)
+			throws InvalidPatternException, PathNotInProjectDirectoryException,
+			IOException {
+		final Rule gitDirectoryIgnoreRule = createGitDirectoryIgnoreRule();
+		final List<Rule> ignoreRuleListFromFiles = createExcludeRules(
+				projectDirectory, gitDirectory);
+		final List<Rule> includeRules = addRuleListFactory.createRuleList(
+				projectDirectory, workingDirectory, filePatternsOfAddCommand);
+		final List<Rule> ruleList = new ArrayList<Rule>();
+
+		ruleList.add(gitDirectoryIgnoreRule);
+		ruleList.addAll(ignoreRuleListFromFiles);
+		ruleList.addAll(includeRules);
+		ruleList.add(new Rule(true, FilePattern.MATCH_ALWAYS));
+
+		return converter.createIgnoreRules(ruleList.iterator());
+	}
+
+	private List<Rule> createExcludeRules(File projectDirectory,
+			File gitDirectory) {
+		final List<File> possibleIgnoreFiles = new ArrayList<File>(2);
+		possibleIgnoreFiles.add(new File(projectDirectory, ".gitignore"));
+		possibleIgnoreFiles.add(new File(new File(gitDirectory, "info"),
+				"exclude"));
+
+		final List<File> ignoreFiles = new ArrayList<File>();
+		for (File possibleIgnoreFile : possibleIgnoreFiles) {
+			if (possibleIgnoreFile.isFile()) {
+				ignoreFiles.add(possibleIgnoreFile);
+			}
+		}
+
+		try {
+			return ignoreRuleListFactory.createIgnoreRuleList(ignoreFiles);
+		} catch (FileNotFoundException e) {
+			throw new RuntimeException("unexpected removal of ignore files", e);
+		}
+	}
+
+	private Rule createGitDirectoryIgnoreRule() {
+		final FilePattern gitDirectoryPattern = new ComplexFilePattern(Arrays
+				.asList(GitPathConstants.REPOSITORY_DIRECTORY_NAME), true);
+		final Rule gitDirectoryIgnoreRule = new Rule(true, gitDirectoryPattern);
+		return gitDirectoryIgnoreRule;
+	}
+}
-- 
1.5.2.5