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ToStringDecoder.java
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59 lines (54 loc) · 1.68 KB
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/*
* Copyright 2013 Netflix, 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 feign.codec;
import java.io.IOException;
import java.io.Reader;
import java.lang.reflect.Type;
import java.nio.CharBuffer;
import feign.Response;
/**
* Adapted from {@code com.google.common.io.CharStreams.toString()}.
*/
public class ToStringDecoder extends Decoder {
private static final int BUF_SIZE = 0x800; // 2K chars (4K bytes)
// overridden to throw only IOException
@Override
public Object decode(String methodKey, Response response, Type type) throws IOException {
Response.Body body = response.body();
if (body == null)
return null;
Reader reader = body.asReader();
try {
return decode(methodKey, reader, type);
} finally {
try {
reader.close();
} catch (IOException suppressed) { // NOPMD
}
}
}
@Override
public Object decode(String methodKey, Reader from, Type type) throws IOException {
StringBuilder to = new StringBuilder();
CharBuffer buf = CharBuffer.allocate(BUF_SIZE);
while (from.read(buf) != -1) {
buf.flip();
to.append(buf);
buf.clear();
}
return to.toString();
}
}