1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | /* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2013-2017 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://oss.oracle.com/licenses/CDDL+GPL-1.1 * or LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ package org.glassfish.json; import org.glassfish.json.api.BufferPool; import javax.json.*; import java.io.FilterOutputStream; import java.io.IOException; import java.io.OutputStream; import java.io.Writer; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import java.util.Map; /** * JsonWriter impl using generator. * * @author Jitendra Kotamraju */ class JsonWriterImpl implements JsonWriter { private final JsonGeneratorImpl generator; private boolean writeDone; private final NoFlushOutputStream os; JsonWriterImpl(Writer writer, BufferPool bufferPool) { this(writer, false, bufferPool); } JsonWriterImpl(Writer writer, boolean prettyPrinting, BufferPool bufferPool) { generator = prettyPrinting ? new JsonPrettyGeneratorImpl(writer, bufferPool) : new JsonGeneratorImpl(writer, bufferPool); os = null; } JsonWriterImpl(OutputStream out, BufferPool bufferPool) { this(out, StandardCharsets.UTF_8, false, bufferPool); } JsonWriterImpl(OutputStream out, boolean prettyPrinting, BufferPool bufferPool) { this(out, StandardCharsets.UTF_8, prettyPrinting, bufferPool); } JsonWriterImpl(OutputStream out, Charset charset, boolean prettyPrinting, BufferPool bufferPool) { // Decorating the given stream, so that buffered contents can be // written without actually flushing the stream. this.os = new NoFlushOutputStream(out); generator = prettyPrinting ? new JsonPrettyGeneratorImpl(os, charset, bufferPool) : new JsonGeneratorImpl(os, charset, bufferPool); } @Override public void writeArray(JsonArray array) { if (writeDone) { throw new IllegalStateException(JsonMessages.WRITER_WRITE_ALREADY_CALLED()); } writeDone = true; generator.writeStartArray(); for(JsonValue value : array) { generator.write(value); } generator.writeEnd(); // Flush the generator's buffered contents. This won't work for byte // streams as intermediary OutputStreamWriter buffers. generator.flushBuffer(); // Flush buffered contents but not the byte stream. generator.flush() // does OutputStreamWriter#flushBuffer (package private) and underlying // byte stream#flush(). Here underlying stream's flush() is no-op. if (os != null) { generator.flush(); } } @Override public void writeObject(JsonObject object) { if (writeDone) { throw new IllegalStateException(JsonMessages.WRITER_WRITE_ALREADY_CALLED()); } writeDone = true; generator.writeStartObject(); for(Map.Entry<String, JsonValue> e : object.entrySet()) { generator.write(e.getKey(), e.getValue()); } generator.writeEnd(); // Flush the generator's buffered contents. This won't work for byte // streams as intermediary OutputStreamWriter buffers. generator.flushBuffer(); // Flush buffered contents but not the byte stream. generator.flush() // does OutputStreamWriter#flushBuffer (package private) and underlying // byte stream#flush(). Here underlying stream's flush() is no-op. if (os != null) { generator.flush(); } } @Override public void write(JsonStructure value) { if (value instanceof JsonArray) { writeArray((JsonArray)value); } else { writeObject((JsonObject)value); } } @Override public void write(JsonValue value) { switch (value.getValueType()) { case OBJECT: writeObject((JsonObject) value); return; case ARRAY: writeArray((JsonArray) value); return; default: if (writeDone) { throw new IllegalStateException(JsonMessages.WRITER_WRITE_ALREADY_CALLED()); } writeDone = true; generator.write(value); generator.flushBuffer(); if (os != null) { generator.flush(); } } } @Override public void close() { writeDone = true; generator.close(); } private static final class NoFlushOutputStream extends FilterOutputStream { public NoFlushOutputStream(OutputStream out) { super(out); } @Override public void write(byte b[], int off, int len) throws IOException { out.write(b, off ,len); } @Override public void flush() { // no-op } } } |