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The AWS Android SDK for Amazon S3 module holds the client classes that are used for communicating with Amazon Simple Storage Service
/*
* Copyright 2015-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.util.json;
import com.amazonaws.util.BinaryUtils;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.EOFException;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.math.BigDecimal;
import java.nio.ByteBuffer;
import java.util.Date;
/**
* An implementation of {@link AwsJsonFactory} with Gson.
*/
final class GsonFactory implements AwsJsonFactory {
@Override
public AwsJsonReader getJsonReader(Reader in) {
return new GsonReader(in);
}
@Override
public AwsJsonWriter getJsonWriter(Writer out) {
return new GsonWriter(out);
}
private static final class GsonReader implements AwsJsonReader {
private final JsonReader reader;
public GsonReader(Reader in) {
this.reader = new JsonReader(in);
}
@Override
public void beginArray() throws IOException {
reader.beginArray();
}
@Override
public void endArray() throws IOException {
reader.endArray();
}
@Override
public void beginObject() throws IOException {
reader.beginObject();
}
@Override
public void endObject() throws IOException {
reader.endObject();
}
@Override
public boolean isContainer() throws IOException {
JsonToken token = reader.peek();
return JsonToken.BEGIN_ARRAY.equals(token)
|| JsonToken.BEGIN_OBJECT.equals(token);
}
@Override
public boolean hasNext() throws IOException {
return reader.hasNext();
}
@Override
public String nextName() throws IOException {
return reader.nextName();
}
@Override
public String nextString() throws IOException {
JsonToken token = reader.peek();
if (JsonToken.NULL.equals(token)) {
reader.nextNull();
return null;
}
if (JsonToken.BOOLEAN.equals(token)) {
return reader.nextBoolean() ? "true" : "false";
}
return reader.nextString();
}
@Override
public void skipValue() throws IOException {
reader.skipValue();
}
@Override
public AwsJsonToken peek() throws IOException {
try {
return convert(reader.peek());
} catch (EOFException e) {
return null;
}
}
@Override
public void close() throws IOException {
reader.close();
}
}
private static AwsJsonToken convert(JsonToken token) {
if (token == null) {
return null;
}
switch (token) {
case BEGIN_ARRAY:
return AwsJsonToken.BEGIN_ARRAY;
case END_ARRAY:
return AwsJsonToken.END_ARRAY;
case BEGIN_OBJECT:
return AwsJsonToken.BEGIN_OBJECT;
case END_OBJECT:
return AwsJsonToken.END_OBJECT;
case NAME:
return AwsJsonToken.FIELD_NAME;
case BOOLEAN:
return AwsJsonToken.VALUE_BOOLEAN;
case NUMBER:
return AwsJsonToken.VALUE_NUMBER;
case NULL:
return AwsJsonToken.VALUE_NULL;
case STRING:
return AwsJsonToken.VALUE_STRING;
case END_DOCUMENT:
return null;
default:
return AwsJsonToken.UNKNOWN;
}
}
private static final class GsonWriter implements AwsJsonWriter {
private final JsonWriter writer;
public GsonWriter(Writer out) {
writer = new JsonWriter(out);
}
@Override
public AwsJsonWriter beginArray() throws IOException {
writer.beginArray();
return this;
}
@Override
public AwsJsonWriter endArray() throws IOException {
writer.endArray();
return this;
}
@Override
public AwsJsonWriter beginObject() throws IOException {
writer.beginObject();
return this;
}
@Override
public AwsJsonWriter endObject() throws IOException {
writer.endObject();
return this;
}
@Override
public AwsJsonWriter name(String name) throws IOException {
writer.name(name);
return this;
}
@Override
public AwsJsonWriter value(String value) throws IOException {
writer.value(value);
return this;
}
@Override
public AwsJsonWriter value(boolean value) throws IOException {
writer.value(value);
return this;
}
@Override
public AwsJsonWriter value(double value) throws IOException {
writer.value(value);
return this;
}
@Override
public AwsJsonWriter value(long value) throws IOException {
writer.value(value);
return this;
}
@Override
public AwsJsonWriter value(Number value) throws IOException {
writer.value(value);
return this;
}
@Override
public AwsJsonWriter value(Date value) throws IOException {
BigDecimal dateValue = BigDecimal.valueOf(value.getTime());
writer.value(dateValue.scaleByPowerOfTen(-3));
return this;
}
@Override
public AwsJsonWriter value(ByteBuffer value) throws IOException {
value.mark();
byte[] bytes = new byte[value.remaining()];
value.get(bytes, 0, bytes.length);
value.reset();
writer.value(BinaryUtils.toBase64(bytes));
return this;
}
@Override
public AwsJsonWriter value() throws IOException {
writer.nullValue();
return this;
}
@Override
public void flush() throws IOException {
writer.flush();
}
@Override
public void close() throws IOException {
writer.close();
}
}
}