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/*******************************************************************************
* ============LICENSE_START====================================================
* * org.onap.aai
* * ===========================================================================
* * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* * Copyright © 2017 Amdocs
* * ===========================================================================
* * 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.
* * ============LICENSE_END====================================================
* *
* * ECOMP is a trademark and service mark of AT&T Intellectual Property.
* *
******************************************************************************/
package com.att.cadi.util;
import java.io.IOException;
import java.io.OutputStream;
public class JsonOutputStream extends OutputStream {
private static final byte[] TWO_SPACE = " ".getBytes();
private OutputStream os;
private boolean closeable;
private int indent = 0;
private int prev,ret=0;
public JsonOutputStream(OutputStream os) {
// Don't close these, or dire consequences.
closeable = !os.equals(System.out) && !os.equals(System.err);
this.os = os;
}
@Override
public void write(int b) throws IOException {
if(ret=='\n') {
ret = 0;
if(prev!=',' || (b!='{' && b!='[')) {
os.write('\n');
for(int i=0;i<indent;++i) {
os.write(TWO_SPACE);
}
}
}
switch(b) {
case '{':
case '[':
ret = '\n';
++indent;
break;
case '}':
case ']':
--indent;
os.write('\n');
for(int i=0;i<indent;++i) {
os.write(TWO_SPACE);
}
break;
case ',':
ret = '\n';
break;
}
os.write(b);
prev = b;
}
public void resetIndent() {
indent = 1;
}
@Override
public void flush() throws IOException {
os.flush();
}
@Override
public void close() throws IOException {
if(closeable) {
os.close();
}
}
}
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