/*
* Copyright 2012-2016 the original author or authors.
*
* 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 org.springframework.boot.test.json;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.util.FileCopyUtils;
/**
* Internal helper used to load JSON from various sources.
*
* @author Phillip Webb
* @author Andy Wilkinson
*/
class JsonLoader {
private final Class<?> resourceLoadClass;
private final Charset charset;
JsonLoader(Class<?> resourceLoadClass, Charset charset) {
this.resourceLoadClass = resourceLoadClass;
this.charset = charset == null ? Charset.forName("UTF-8") : charset;
}
Class<?> getResourceLoadClass() {
return this.resourceLoadClass;
}
String getJson(CharSequence source) {
if (source == null) {
return null;
}
if (source.toString().endsWith(".json")) {
return getJson(
new ClassPathResource(source.toString(), this.resourceLoadClass));
}
return source.toString();
}
String getJson(String path, Class<?> resourceLoadClass) {
return getJson(new ClassPathResource(path, resourceLoadClass));
}
String getJson(byte[] source) {
return getJson(new ByteArrayInputStream(source));
}
String getJson(File source) {
try {
return getJson(new FileInputStream(source));
}
catch (IOException ex) {
throw new IllegalStateException("Unable to load JSON from " + source, ex);
}
}
String getJson(Resource source) {
try {
return getJson(source.getInputStream());
}
catch (IOException ex) {
throw new IllegalStateException("Unable to load JSON from " + source, ex);
}
}
String getJson(InputStream source) {
try {
return FileCopyUtils
.copyToString(new InputStreamReader(source, this.charset));
}
catch (IOException ex) {
throw new IllegalStateException("Unable to load JSON from InputStream", ex);
}
}
}