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/*
* Copyright 1999-2011 Alibaba Group.
*
* 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 com.alibaba.dubbo.common.serialize.support.json;
import java.io.BufferedReader;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.lang.reflect.Type;
import java.util.Map;
import com.alibaba.dubbo.common.json.JSON;
import com.alibaba.dubbo.common.json.ParseException;
import com.alibaba.dubbo.common.serialize.ObjectInput;
import com.alibaba.dubbo.common.utils.PojoUtils;
/**
* JsonObjectInput
*
* @author william.liangf
* @author ding.lid
*/
public class JsonObjectInput implements ObjectInput {
private final BufferedReader reader;
public JsonObjectInput(InputStream in){
this(new InputStreamReader(in));
}
public JsonObjectInput(Reader reader){
this.reader = new BufferedReader(reader);
}
public boolean readBool() throws IOException {
try {
return readObject(boolean.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public byte readByte() throws IOException {
try {
return readObject( byte.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public short readShort() throws IOException {
try {
return readObject(short.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public int readInt() throws IOException {
try {
return readObject(int.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public long readLong() throws IOException {
try {
return readObject(long.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public float readFloat() throws IOException {
try {
return readObject(float.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public double readDouble() throws IOException {
try {
return readObject(double.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public String readUTF() throws IOException {
try {
return readObject(String.class);
} catch (ClassNotFoundException e) {
throw new IOException(e.getMessage());
}
}
public byte[] readBytes() throws IOException {
return readLine().getBytes();
}
public Object readObject() throws IOException, ClassNotFoundException {
try {
String json = readLine();
if (json.startsWith("{")) {
return JSON.parse(json, Map.class);
} else {
json = "{\"value\":" + json + "}";
@SuppressWarnings("unchecked")
Map map = JSON.parse(json, Map.class);
return map.get("value");
}
} catch (ParseException e) {
throw new IOException(e.getMessage());
}
}
@SuppressWarnings("unchecked")
public T readObject(Class cls) throws IOException, ClassNotFoundException {
Object value = readObject();
return (T) PojoUtils.realize(value, cls);
/*try {
return JSON.parse(readLine(), cls);
} catch (ParseException e) {
throw new IOException(e.getMessage());
}*/
}
@SuppressWarnings("unchecked")
public T readObject(Class cls, Type type) throws IOException,ClassNotFoundException
{
Object value = readObject();
return (T) PojoUtils.realize(value, cls, type);
}
private String readLine() throws IOException, EOFException {
String line = reader.readLine();
if(line == null || line.trim().length() == 0) throw new EOFException();
return line;
}
}