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IOHelpers.java
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IOHelpers.java
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/**
* Copyright (C) 2015 Red Hat, Inc.
*
* 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 io.fabric8.kubernetes.client.utils;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.charset.Charset;
/**
*/
public class IOHelpers {
private IOHelpers() {
throw new IllegalStateException("Utility class");
}
public static String readFully(InputStream in, Charset charset) throws IOException {
Reader r = new BufferedReader(new InputStreamReader(in, charset));
return readFully(r);
}
public static String readFully(InputStream in) throws IOException {
return readFully(in, Charset.defaultCharset());
}
public static String readFully(Reader r) throws IOException {
try (StringWriter w = new StringWriter()) {
copy(r, w);
return w.toString();
}
}
private static void copy(Reader reader, Writer writer) throws IOException {
char[] buffer = new char[8192];
int len;
for (;;) {
len = reader.read(buffer);
if (len > 0) {
writer.write(buffer, 0, len);
} else {
writer.flush();
break;
}
}
}
public static boolean isJSONValid(String json) {
try {
ObjectMapper objectMapper = Serialization.jsonMapper();
objectMapper.readTree(json);
} catch (JsonProcessingException e) {
return false;
}
return true;
}
public static String convertYamlToJson(String yaml) throws IOException {
ObjectMapper yamlReader = Serialization.yamlMapper();
Object obj = yamlReader.readValue(yaml, Object.class);
ObjectMapper jsonWriter = Serialization.jsonMapper();
return jsonWriter.writeValueAsString(obj);
}
public static String convertToJson(String jsonOrYaml) throws IOException {
if (isJSONValid(jsonOrYaml)) {
return jsonOrYaml;
}
return convertYamlToJson(jsonOrYaml);
}
}