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package example21;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.jibx.runtime.IAliasable;
import org.jibx.runtime.IMarshallable;
import org.jibx.runtime.IMarshaller;
import org.jibx.runtime.IMarshallingContext;
import org.jibx.runtime.IUnmarshaller;
import org.jibx.runtime.IUnmarshallingContext;
import org.jibx.runtime.JiBXException;
import org.jibx.runtime.impl.MarshallingContext;
import org.jibx.runtime.impl.UnmarshallingContext;
public class HashMapper implements IMarshaller, IUnmarshaller, IAliasable
{
private static final String SIZE_ATTRIBUTE_NAME = "size";
private static final String ENTRY_ELEMENT_NAME = "entry";
private static final String KEY_ATTRIBUTE_NAME = "key";
private static final int DEFAULT_SIZE = 10;
private String m_uri;
private int m_index;
private String m_name;
public HashMapper() {
m_uri = null;
m_index = 0;
m_name = "hashmap";
}
public HashMapper(String uri, int index, String name) {
m_uri = uri;
m_index = index;
m_name = name;
}
/* (non-Javadoc)
* @see org.jibx.runtime.IMarshaller#isExtension(java.lang.String)
*/
public boolean isExtension(String mapname) {
return false;
}
/* (non-Javadoc)
* @see org.jibx.runtime.IMarshaller#marshal(java.lang.Object,
* org.jibx.runtime.IMarshallingContext)
*/
public void marshal(Object obj, IMarshallingContext ictx)
throws JiBXException {
// make sure the parameters are as expected
if (!(obj instanceof HashMap)) {
throw new JiBXException("Invalid object type for marshaller");
} else if (!(ictx instanceof MarshallingContext)) {
throw new JiBXException("Invalid object type for marshaller");
} else {
// start by generating start tag for container
MarshallingContext ctx = (MarshallingContext)ictx;
HashMap map = (HashMap)obj;
ctx.startTagAttributes(m_index, m_name).
attribute(m_index, SIZE_ATTRIBUTE_NAME, map.size()).
closeStartContent();
// loop through all entries in hashmap
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry)iter.next();
ctx.startTagAttributes(m_index, ENTRY_ELEMENT_NAME);
if (entry.getKey() != null) {
ctx.attribute(m_index, KEY_ATTRIBUTE_NAME,
entry.getKey().toString());
}
ctx.closeStartContent();
if (entry.getValue() instanceof IMarshallable) {
((IMarshallable)entry.getValue()).marshal(ctx);
ctx.endTag(m_index, ENTRY_ELEMENT_NAME);
} else {
throw new JiBXException("Mapped value is not marshallable");
}
}
// finish with end tag for container element
ctx.endTag(m_index, m_name);
}
}
/* (non-Javadoc)
* @see org.jibx.runtime.IUnmarshaller#isPresent(org.jibx.runtime.IUnmarshallingContext)
*/
public boolean isPresent(IUnmarshallingContext ctx) throws JiBXException {
return ctx.isAt(m_uri, m_name);
}
/* (non-Javadoc)
* @see org.jibx.runtime.IUnmarshaller#unmarshal(java.lang.Object,
* org.jibx.runtime.IUnmarshallingContext)
*/
public Object unmarshal(Object obj, IUnmarshallingContext ictx)
throws JiBXException {
// make sure we're at the appropriate start tag
UnmarshallingContext ctx = (UnmarshallingContext)ictx;
if (!ctx.isAt(m_uri, m_name)) {
ctx.throwStartTagNameError(m_uri, m_name);
}
// create new hashmap if needed
int size = ctx.attributeInt(m_uri, SIZE_ATTRIBUTE_NAME, DEFAULT_SIZE);
HashMap map = (HashMap)obj;
if (map == null) {
map = new HashMap(size);
}
// process all entries present in document
ctx.parsePastStartTag(m_uri, m_name);
while (ctx.isAt(m_uri, ENTRY_ELEMENT_NAME)) {
Object key = ctx.attributeText(m_uri, KEY_ATTRIBUTE_NAME, null);
ctx.parsePastStartTag(m_uri, ENTRY_ELEMENT_NAME);
Object value = ctx.unmarshalElement();
map.put(key, value);
ctx.parsePastEndTag(m_uri, ENTRY_ELEMENT_NAME);
}
ctx.parsePastEndTag(m_uri, m_name);
return map;
}
}
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