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jsorel pushed a commit to branch geoapi-4.0
in repository https://gitbox.apache.org/repos/asf/sis.git
The following commit(s) were added to refs/heads/geoapi-4.0 by this push:
new 91a77c4 Shapefile : add cpg file utility class
91a77c4 is described below
commit 91a77c437892d2f018ab6cab6acb566f91c31f9a
Author: jsorel <johann.so...@geomatys.com>
AuthorDate: Fri Nov 22 10:21:01 2019 +0100
Shapefile : add cpg file utility class
---
.../apache/sis/storage/shapefile/cpg/CpgFiles.java | 87 ++++++++++++++++++++++
1 file changed, 87 insertions(+)
diff --git
a/storage/sis-shapefile/src/main/java/org/apache/sis/storage/shapefile/cpg/CpgFiles.java
b/storage/sis-shapefile/src/main/java/org/apache/sis/storage/shapefile/cpg/CpgFiles.java
new file mode 100644
index 0000000..4eec64a
--- /dev/null
+++
b/storage/sis-shapefile/src/main/java/org/apache/sis/storage/shapefile/cpg/CpgFiles.java
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.sis.storage.shapefile.cpg;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.channels.Channels;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+/**
+ * CPG files utilities.
+ * *.cpg files contains a single word for the name of the dbf character
encoding.
+ *
+ * @author Johann Sorel (Geomatys)
+ * @version 2.0
+ * @since 2.0
+ * @module
+ */
+public final class CpgFiles {
+
+ private CpgFiles(){}
+
+ /**
+ * Read charset from given stream.
+ *
+ * @param in input channel
+ * @return CharSet
+ * @throws IOException
+ */
+ public static Charset read(ReadableByteChannel in) throws IOException {
+ final String str =
toString(Channels.newInputStream(in),Charset.forName("UTF-8")).trim();
+ return Charset.forName(str);
+ }
+
+ /**
+ * Write charset to given file.
+ *
+ * @param cs charset to write.
+ * @param file output file.
+ * @throws IOException
+ */
+ public static void write(Charset cs, Path file) throws IOException {
+ try (BufferedWriter cpgWriter = Files.newBufferedWriter(file,
Charset.defaultCharset())) {
+ cpgWriter.write(cs.name());
+ }
+ }
+
+ /**
+ * Read the contents of a stream into String with specified encoding and
close the Stream.
+ *
+ * @param stream input steam
+ * @return The file contents as string
+ * @throws IOException if the file does not exist or cannot be read.
+ */
+ private static String toString(final InputStream stream, final Charset
encoding) throws IOException {
+ final StringBuilder sb = new StringBuilder();
+ try (BufferedReader br = new BufferedReader(new
InputStreamReader(stream, encoding))) {
+ String line;
+ while ((line = br.readLine()) != null) {
+ sb.append(line).append('\n');
+ }
+ } finally {
+ stream.close();
+ }
+ return sb.toString();
+ }
+}
