Source Code Cross Referenced for DomFragmentMapper.java in  » XML » jibx-1.1.5 » org » jibx » extras » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » jibx 1.1.5 » org.jibx.extras 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:        Copyright (c) 2004, Dennis M. Sosnoski
003:        All rights reserved.
004:
005:        Redistribution and use in source and binary forms, with or without modification,
006:        are permitted provided that the following conditions are met:
007:
008:         * Redistributions of source code must retain the above copyright notice, this
009:           list of conditions and the following disclaimer.
010:         * Redistributions in binary form must reproduce the above copyright notice,
011:           this list of conditions and the following disclaimer in the documentation
012:           and/or other materials provided with the distribution.
013:         * Neither the name of JiBX nor the names of its contributors may be used
014:           to endorse or promote products derived from this software without specific
015:           prior written permission.
016:
017:        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
018:        ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
019:        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
020:        DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
021:        ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
022:        (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
023:        LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
024:        ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
025:        (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
026:        SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
027:         */
028:
029:        package org.jibx.extras;
030:
031:        import java.io.IOException;
032:
033:        import org.jibx.runtime.IMarshaller;
034:        import org.jibx.runtime.IMarshallingContext;
035:        import org.jibx.runtime.IUnmarshaller;
036:        import org.jibx.runtime.IUnmarshallingContext;
037:        import org.jibx.runtime.IXMLReader;
038:        import org.jibx.runtime.JiBXException;
039:        import org.jibx.runtime.impl.UnmarshallingContext;
040:        import org.w3c.dom.DocumentFragment;
041:        import org.w3c.dom.Node;
042:
043:        /**
044:         * <p>Custom content list marshaller/unmarshaller to DOM representation. This
045:         * allows you to mix data binding and document model representations for XML
046:         * within the same application. You simply use this marshaller/unmarshaller with
047:         * a linked object type of <code>org.w3c.dom.DocumentFragment</code> (the actual
048:         * runtime type - the declared type is ignored and can be anything). When
049:         * unmarshalling it will create a fragment to hold any content up to the close
050:         * tag for the enclosing element in the list. When marshalling, it will simply
051:         * write out any content directly.</p>
052:         * 
053:         * @author Dennis M. Sosnoski
054:         * @version 1.0
055:         */
056:
057:        public class DomFragmentMapper extends DomMapperBase implements 
058:                IMarshaller, IUnmarshaller {
059:            /**
060:             * Default constructor.
061:             * 
062:             * @throws JiBXException on configuration error
063:             */
064:            public DomFragmentMapper() throws JiBXException {
065:                super ();
066:            }
067:
068:            /* (non-Javadoc)
069:             * @see org.jibx.runtime.IMarshaller#isExtension(int)
070:             */
071:
072:            public boolean isExtension(int index) {
073:                return false;
074:            }
075:
076:            /* (non-Javadoc)
077:             * @see org.jibx.runtime.IMarshaller#marshal(java.lang.Object,
078:             *  org.jibx.runtime.IMarshallingContext)
079:             */
080:
081:            public void marshal(Object obj, IMarshallingContext ictx)
082:                    throws JiBXException {
083:
084:                // make sure the parameters are as expected
085:                if (!(obj instanceof  DocumentFragment)) {
086:                    throw new JiBXException(
087:                            "Mapped object not an org.w3c.dom.DocumentFragment");
088:                } else {
089:                    try {
090:
091:                        // marshal document fragment with no indentation
092:                        m_xmlWriter = ictx.getXmlWriter();
093:                        int indent = ictx.getIndent();
094:                        ictx.setIndent(-1);
095:                        m_defaultNamespaceURI = null;
096:                        marshalContent(((DocumentFragment) obj).getChildNodes());
097:                        ictx.setIndent(indent);
098:
099:                    } catch (IOException e) {
100:                        throw new JiBXException("Error writing to document", e);
101:                    }
102:                }
103:            }
104:
105:            /* (non-Javadoc)
106:             * @see org.jibx.runtime.IUnmarshaller#isPresent(org.jibx.runtime.IUnmarshallingContext)
107:             */
108:
109:            public boolean isPresent(IUnmarshallingContext ctx)
110:                    throws JiBXException {
111:                if (!(ctx instanceof  UnmarshallingContext)) {
112:                    throw new JiBXException(
113:                            "Unmarshalling context not of expected type");
114:                } else {
115:                    return ((UnmarshallingContext) ctx).currentEvent() != IXMLReader.END_TAG;
116:                }
117:            }
118:
119:            /* (non-Javadoc)
120:             * @see org.jibx.runtime.IUnmarshaller#unmarshal(java.lang.Object,
121:             *  org.jibx.runtime.IUnmarshallingContext)
122:             */
123:
124:            public Object unmarshal(Object obj, IUnmarshallingContext ictx)
125:                    throws JiBXException {
126:
127:                // verify the entry conditions
128:                boolean created = false;
129:                DocumentFragment frag = null;
130:                if (obj == null) {
131:                    frag = m_document.createDocumentFragment();
132:                    created = true;
133:                } else if (obj instanceof  DocumentFragment) {
134:                    frag = (DocumentFragment) obj;
135:                } else {
136:                    throw new JiBXException(
137:                            "Supplied object is not an org.w3c.dom.DocumentFragment");
138:                }
139:                if (!(ictx instanceof  UnmarshallingContext)) {
140:                    throw new JiBXException(
141:                            "Unmarshalling context not of expected type");
142:                }
143:
144:                // unmarshal content to document model
145:                m_unmarshalContext = (UnmarshallingContext) ictx;
146:                try {
147:                    Node node;
148:                    while ((node = unmarshalNode()) != null) {
149:                        frag.appendChild(node);
150:                    }
151:                    if (created && !frag.hasChildNodes()) {
152:                        return null;
153:                    } else {
154:                        return frag;
155:                    }
156:                } catch (IOException e) {
157:                    throw new JiBXException("Error reading from document", e);
158:                }
159:            }
160:        }
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