001/* 002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nicolas Chapurlat <nchapurlat@nuxeo.com> 018 */ 019 020package org.nuxeo.ecm.core.io.marshallers.json; 021 022import static java.nio.charset.StandardCharsets.UTF_8; 023 024import java.io.IOException; 025import java.io.OutputStream; 026import java.io.Writer; 027 028import org.apache.commons.io.output.WriterOutputStream; 029 030import com.fasterxml.jackson.core.JsonGenerator; 031 032/** 033 * This {@link OutputStream} is a technical wrapper for {@link JsonGenerator}. It's used to broadcast a 034 * {@link JsonGenerator} between marshallers. 035 * <p> 036 * take a look at {@link AbstractJsonWriter#getGenerator(OutputStream, boolean)} to understand the mechanism. 037 * </p> 038 * 039 * @since 7.2 040 */ 041public class OutputStreamWithJsonWriter extends OutputStream { 042 043 private OutputStream out; 044 045 private JsonGenerator jsonGenerator; 046 047 public OutputStreamWithJsonWriter(JsonGenerator jsonGenerator) { 048 super(); 049 this.jsonGenerator = jsonGenerator; 050 Object outputTarget = jsonGenerator.getOutputTarget(); 051 if (outputTarget instanceof OutputStream) { 052 out = (OutputStream) outputTarget; 053 } else if (outputTarget instanceof Writer) { 054 out = new WriterOutputStream((Writer) outputTarget, UTF_8); 055 } 056 } 057 058 public JsonGenerator getJsonGenerator() { 059 return jsonGenerator; 060 } 061 062 @Override 063 public void write(int b) throws IOException { 064 out.write(b); 065 } 066 067 @Override 068 public void write(byte[] b) throws IOException { 069 out.write(b); 070 } 071 072 @Override 073 public void write(byte[] b, int off, int len) throws IOException { 074 out.write(b, off, len); 075 } 076 077 @Override 078 public void flush() throws IOException { 079 out.flush(); 080 } 081 082 @Override 083 public void close() throws IOException { 084 flush(); 085 // DO NOT close the OutputStream, it's owned by the JsonGenerator, not us 086 } 087 088}