initial commit

.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java"/>
+	<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
+	<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER"/>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

.gitignore

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+target/

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>commons</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.maven.ide.eclipse.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.maven.ide.eclipse.maven2Nature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

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+#Sat May 28 16:31:22 EDT 2011
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.source=1.7
+org.eclipse.jdt.core.compiler.compliance=1.7

.settings/org.eclipse.jdt.ui.prefs

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+#Sat May 28 17:03:21 EDT 2011
+sp_cleanup.add_missing_override_annotations=true
+sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
+sp_cleanup.remove_unnecessary_nls_tags=true
+editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
+sp_cleanup.make_variable_declarations_final=true
+sp_cleanup.add_generated_serial_version_id=false
+sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
+sp_cleanup.remove_trailing_whitespaces_ignore_empty=false
+sp_cleanup.always_use_this_for_non_static_method_access=false
+sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
+sp_cleanup.remove_unused_private_methods=true
+sp_cleanup.sort_members=true
+sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
+sp_cleanup.remove_trailing_whitespaces=true
+sp_cleanup.make_parameters_final=true
+sp_cleanup.remove_unused_private_members=false
+sp_cleanup.make_private_fields_final=true
+sp_cleanup.remove_unused_imports=true
+sp_cleanup.always_use_parentheses_in_expressions=false
+sp_cleanup.make_local_variable_final=true
+sp_cleanup.remove_unnecessary_casts=true
+sp_cleanup.use_this_for_non_static_method_access=true
+sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
+sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_trailing_whitespaces_all=true
+sp_cleanup.add_missing_deprecated_annotations=true
+sp_cleanup.add_missing_annotations=true
+sp_cleanup.never_use_parentheses_in_expressions=true
+sp_cleanup.organize_imports=true
+sp_cleanup.format_source_code_changes_only=false
+sp_cleanup.always_use_blocks=true
+sp_cleanup.use_blocks=true
+sp_cleanup.use_this_for_non_static_field_access=true
+sp_cleanup.never_use_blocks=false
+sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.remove_unused_private_types=true
+sp_cleanup.sort_members_all=true
+sp_cleanup.add_missing_nls_tags=false
+sp_cleanup.always_use_this_for_non_static_field_access=false
+eclipse.preferences.version=1
+sp_cleanup.add_missing_methods=false
+sp_cleanup.make_type_abstract_if_missing_method=false
+sp_cleanup.format_source_code=true
+sp_cleanup.use_parentheses_in_expressions=true
+sp_cleanup.on_save_use_additional_actions=true
+sp_cleanup.add_default_serial_version_id=true
+sp_cleanup.remove_unused_local_variables=false
+sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
+sp_cleanup.correct_indentation=true
+sp_cleanup.remove_unused_private_fields=true
+sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
+sp_cleanup.add_serial_version_id=false

.settings/org.maven.ide.eclipse.prefs

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+#Sat May 28 16:26:54 EDT 2011
+version=1
+resolveWorkspaceProjects=true
+activeProfiles=
+eclipse.preferences.version=1
+fullBuildGoals=process-test-resources
+resourceFilterGoals=process-resources resources\:testResources
+includeModules=false
+skipCompilerPlugin=true

pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>net.trajano</groupId>
+	<artifactId>commons</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>Commons</name>
+	<description>This class provides common utility classes similar to that of Apache Commons, but with the focus on JDK7</description>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>2.3.2</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+	<dependencies>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.8.2</version>
+			<type>jar</type>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+</project>

src/main/java/net/trajano/commons/filevisitor/RemoveEmptyFoldersVisitor.java

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+package net.trajano.commons.filevisitor;
+
+import java.io.IOException;
+import java.nio.file.DirectoryStream;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+
+public class RemoveEmptyFoldersVisitor extends SimpleFileVisitor<Path> {
+	@Override
+	public FileVisitResult postVisitDirectory(Path dir, IOException exc)
+			throws IOException {
+		DirectoryStream<Path> ds = Files.newDirectoryStream(dir);
+		boolean hasFiles = ds.iterator().hasNext();
+		ds.close();
+		if (!hasFiles) {
+			Files.delete(dir);
+		}
+		return FileVisitResult.CONTINUE;
+	}
+}

src/main/java/net/trajano/commons/filevisitor/RemoveFoldersVisitor.java

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+package net.trajano.commons.filevisitor;
+
+import java.io.IOException;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
+
+public class RemoveFoldersVisitor extends SimpleFileVisitor<Path> {
+	Path currentDirectory = null;
+
+	@Override
+	public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
+			throws IOException {
+		Files.delete(file);
+		return FileVisitResult.CONTINUE;
+	}
+
+	@Override
+	public FileVisitResult postVisitDirectory(Path dir, IOException exc)
+			throws IOException {
+		Files.delete(dir);
+		return FileVisitResult.CONTINUE;
+	}
+}

src/main/java/net/trajano/commons/io/DigestInputStream.java

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+package net.trajano.commons.io;
+
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * This wraps an input stream to provide a digest.
+ * 
+ * @author trajano
+ * 
+ */
+public class DigestInputStream extends FilterInputStream {
+	/**
+	 * Message digest.
+	 */
+	private final MessageDigest digest;
+	private byte[] digestValue = null;
+
+	public DigestInputStream(final InputStream in, final String algorithm)
+			throws NoSuchAlgorithmException {
+		super(in);
+		digest = MessageDigest.getInstance(algorithm);
+
+	}
+
+	@Override
+	public void close() throws IOException {
+		in.close();
+		digestValue = digest.digest();
+	}
+
+	/**
+	 * This will return the digest value. This will return <code>null</code> if
+	 * the stream is not closed.
+	 * 
+	 * @return
+	 */
+	public byte[] digest() {
+		return digestValue;
+	}
+
+	@Override
+	public int read() throws IOException {
+		final int c = in.read();
+		digest.update((byte) c);
+		return c;
+	}
+
+	@Override
+	public int read(final byte[] b) throws IOException {
+		final int c = in.read(b);
+		digest.update(b);
+		return c;
+	}
+
+	@Override
+	public int read(final byte[] b, final int off, final int len)
+			throws IOException {
+		final int c = in.read(b, off, len);
+		digest.update(b, off, len);
+		return c;
+	}
+}

src/main/java/net/trajano/commons/io/DigestOutputStream.java

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+package net.trajano.commons.io;
+
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * This wraps an input stream to provide a digest.
+ * 
+ * @author trajano
+ * 
+ */
+public class DigestOutputStream extends FilterOutputStream {
+	/**
+	 * Message digest.
+	 */
+	private final MessageDigest digest;
+	private byte[] digestValue = null;
+
+	public DigestOutputStream(final OutputStream out, final String algorithm)
+			throws NoSuchAlgorithmException {
+		super(out);
+		digest = MessageDigest.getInstance(algorithm);
+	}
+
+	@Override
+	public void close() throws IOException {
+		out.close();
+		digestValue = digest.digest();
+	}
+
+	/**
+	 * This will return the digest value. This will return <code>null</code> if
+	 * the stream is not closed.
+	 * 
+	 * @return
+	 */
+	public byte[] digest() {
+		return digestValue;
+	}
+
+	@Override
+	public void write(final byte[] b) throws IOException {
+		digest.update(b);
+		out.write(b);
+	}
+
+	@Override
+	public void write(final byte[] b, final int off, final int len)
+			throws IOException {
+		digest.update(b, off, len);
+		out.write(b, off, len);
+	}
+
+	@Override
+	public void write(final int b) throws IOException {
+		digest.update((byte) b);
+		out.write(b);
+	}
+}