# PrettyXMLStreamWriter.java

    /*
     * Copyright 2011, 2012 Odysseus Software GmbH
     *
     * 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 org.apache.synapse.commons.staxon.core.xml.util;

    import javax.xml.stream.XMLStreamException;
    import javax.xml.stream.XMLStreamWriter;

    import org.apache.synapse.commons.staxon.core.util.StreamWriterDelegate;

    /**
     * Pretty printing XML stream writer.
     */
    public class PrettyXMLStreamWriter extends StreamWriterDelegate {
        private final PrettyXMLWhitespaceHandler handler;

        /**
         * Create instance using default indentation (\t) and line separator (\n).
         *
         * @param writer parent writer
         */
        public PrettyXMLStreamWriter(XMLStreamWriter writer) {
            this(writer, "\t", "\n");
        }

        /**
         * Create instance.
         *
         * @param writer      parent writer
         * @param indentation line indentation
         * @param newline     line separator
         */
        public PrettyXMLStreamWriter(XMLStreamWriter writer, String indentation, String newline) {
            super(writer);
            this.handler = new PrettyXMLWhitespaceHandler(writer, indentation, newline);
        }

        @Override
        public void setParent(XMLStreamWriter parent) {
            throw new UnsupportedOperationException();
        }

        @Override
        public void writeStartDocument() throws XMLStreamException {
            handler.preStartDocument();
            super.writeStartDocument();
            handler.postStartDocument();
        }

        @Override
        public void writeStartDocument(String version) throws XMLStreamException {
            handler.preStartDocument();
            super.writeStartDocument(version);
            handler.postStartDocument();
        }

        @Override
        public void writeStartDocument(String encoding, String version) throws XMLStreamException {
            handler.preStartDocument();
            super.writeStartDocument(encoding, version);
            handler.postStartDocument();
        }

        @Override
        public void writeStartElement(String localName) throws XMLStreamException {
            handler.preStartElement();
            super.writeStartElement(localName);
            handler.postStartElement();
        }

        @Override
        public void writeStartElement(String namespaceURI, String localName) throws XMLStreamException {
            handler.preStartElement();
            super.writeStartElement(namespaceURI, localName);
            handler.postStartElement();
        }

        @Override
        public void writeStartElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
            handler.preStartElement();
            super.writeStartElement(prefix, localName, namespaceURI);
            handler.postStartElement();
        }

        @Override
        public void writeEmptyElement(String namespaceURI, String localName) throws XMLStreamException {
            handler.preEmptyELement();
            super.writeEmptyElement(namespaceURI, localName);
            handler.postEmptyELement();
        }

        @Override
        public void writeEmptyElement(String prefix, String localName, String namespaceURI) throws XMLStreamException {
            handler.preEmptyELement();
            super.writeEmptyElement(prefix, localName, namespaceURI);
            handler.postEmptyELement();
        }

        @Override
        public void writeEmptyElement(String localName) throws XMLStreamException {
            handler.preEmptyELement();
            super.writeEmptyElement(localName);
            handler.postEmptyELement();
        }

        @Override
        public void writeEndElement() throws XMLStreamException {
            handler.preEndElement();
            super.writeEndElement();
            handler.postEndElement();
        }

        @Override
        public void writeCData(String data) throws XMLStreamException {
            handler.preCharacters();
            super.writeCData(data);
            handler.postCharacters();
        }

        @Override
        public void writeCharacters(String text) throws XMLStreamException {
            handler.preCharacters();
            super.writeCharacters(text);
            handler.postCharacters();
        }

        @Override
        public void writeCharacters(char[] text, int start, int len) throws XMLStreamException {
            handler.preCharacters();
            super.writeCharacters(text, start, len);
            handler.postCharacters();
        }

        @Override
        public void writeComment(String data) throws XMLStreamException {
            handler.preComment();
            super.writeComment(data);
            handler.postComment();
        }

        @Override
        public void writeProcessingInstruction(String target) throws XMLStreamException {
            handler.preProcessingInstruction();
            super.writeProcessingInstruction(target);
            handler.postProcessingInstruction();
        }

        @Override
        public void writeProcessingInstruction(String target, String data) throws XMLStreamException {
            handler.preProcessingInstruction();
            super.writeProcessingInstruction(target, data);
            handler.postProcessingInstruction();
        }
    }