gvsig-tools / org.gvsig.tools / library / trunk / org.gvsig.tools / org.gvsig.tools.lib / src / main / java / org / gvsig / tools / dynobject / impl / DynClassImportHelper.java @ 112
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package org.gvsig.tools.dynobject.impl; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.dataTypes.CoercionException; |
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import org.gvsig.tools.dynobject.DynClass; |
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import org.gvsig.tools.dynobject.DynField; |
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import org.gvsig.tools.dynobject.DynObjectManager; |
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import org.gvsig.tools.dynobject.DynObjectValueItem; |
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import org.gvsig.tools.dynobject.exception.DynFieldIsNotAContainerException; |
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import org.xmlpull.v1.XmlPullParser; |
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import org.xmlpull.v1.XmlPullParserException; |
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public class DynClassImportHelper { |
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private static final String VERSION_VALUE = "1.0.0"; |
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private static final String DEFINITIONS_TAG = "definitions"; |
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private static final String VERSION_TAG = "version"; |
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private static final String CLASSES_TAG = "classes"; |
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private static final String CLASS_TAG = "class"; |
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private static final String CLASS_NAME_TAG = "name"; |
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private static final String CLASS_NAMESPACE_TAG = "namespace"; |
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private static final String CLASS_DESCRIPTION_TAG = "description"; |
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private static final String CLASS_SUPERCLASSNAMES_TAG = "superClassNames"; |
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private static final String CLASS_SUPERCLASSNAME_TAG = "superClassName"; |
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private static final String CLASS_EXTENDS_TAG = "extends"; |
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private static final String CLASS_EXTENDS_CLASS_TAG = "class"; |
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private static final String CLASS_FIELDS_TAG = "fields"; |
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private static final String FIELD_TAG = "field"; |
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private static final String FIELD_NAME_TAG = "name"; |
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private static final String FIELD_DESCRIPTION_TAG = "description"; |
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private static final String FIELD_SUBTYPE_TAG = "subtype"; |
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private static final String FIELD_TYPE_TAG = "type"; |
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private static final String FIELD_ISMANDATORY_TAG = "mandatory"; |
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private static final String FIELD_ISPERSISTENT_TAG = "persistent"; |
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private static final String FIELD_MINVALUE_TAG = "minValue"; |
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private static final String FIELD_MAXVALUE_TAG = "maxValue"; |
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private static final String FIELD_CLASSOFVALUE_TAG = "classOfValue"; |
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private static final String FIELD_DEFAULTVALUE_TAG = "defaultValue"; |
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// private static final String FIELD_TYPEOFAVALILABLEVALUES_TAG = "typeOfAvailableValues";
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private static final String FIELD_AVALILABLEVALUES_TAG = "availableValues"; |
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private static final String FIELD_GROUP_TAG = "group"; |
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private static final String FIELD_ORDER_TAG = "order"; |
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private static final String VALUEITEM_TAG = "valueItem"; |
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private static final String VALUEITEM_LABEL_TAG = "label"; |
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private static final String VALUEITEM_VALUE_TAG = "value"; |
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public Map importDefinitions(InputStream resource, ClassLoader loader) throws XmlPullParserException, IOException { |
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XmlPullParser parser = ToolsLocator.getXmlPullParser(); |
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parser.setInput(resource, null);
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return importDefinitions(parser, loader);
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} |
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public Map importDefinitions(XmlPullParser parser, ClassLoader loader) throws XmlPullParserException, IOException { |
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Map dynClasses = new HashMap(); |
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String version = null; |
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if( loader == null ) { |
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loader = this.getClass().getClassLoader();
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} |
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, null, DEFINITIONS_TAG);
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for( int i=0;i<parser.getAttributeCount(); i++) { |
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String name = parser.getAttributeName(i);
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if( name.equalsIgnoreCase(VERSION_TAG) ) {
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version = parser.getAttributeValue(i); |
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} else {
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// FIXME: throw exception
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} |
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} |
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parser.nextTag(); |
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if( parser.getName().equalsIgnoreCase(VERSION_TAG) ) {
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parser.require(XmlPullParser.START_TAG, null, VERSION_TAG);
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version = parser.nextText(); |
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if (!version.trim().equals(VERSION_VALUE) ) {
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throw new UnsupportedClassVersionError(); |
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} |
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parser.require(XmlPullParser.END_TAG, "", VERSION_TAG);
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.START_TAG, "", CLASSES_TAG);
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(CLASSES_TAG))) {
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checkEndDocument(parser); |
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DynClass dynClass = importDynClass(parser, loader); |
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if( dynClasses.get(dynClass.getName())!=null ) { |
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throw new DuplicateDynClassException(parser, dynClass.getName()); |
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} |
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dynClasses.put(dynClass.getName(), dynClass); |
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} |
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parser.require(XmlPullParser.END_TAG, "", CLASSES_TAG);
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parser.nextTag(); |
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parser.require(XmlPullParser.END_TAG, "", DEFINITIONS_TAG);
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parser.next(); |
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parser.require(XmlPullParser.END_DOCUMENT, null, null); |
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return dynClasses;
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} |
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private DynClass importDynClass(XmlPullParser parser, ClassLoader loader) throws XmlPullParserException, IOException { |
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DynObjectManager manager = ToolsLocator.getDynObjectManager(); |
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DynClass dynClass; |
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List superClassNames = new ArrayList(); |
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Map values = new HashMap(); |
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parser.require(XmlPullParser.START_TAG, null, CLASS_TAG);
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//
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// Collect class attributes from tag attributes
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//
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for( int i=0; i<parser.getAttributeCount(); i++ ) { |
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values.put(parser.getAttributeName(i), parser.getAttributeValue(i)); |
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} |
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(CLASSES_TAG))) {
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checkEndDocument(parser); |
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parser.require(XmlPullParser.START_TAG, null, null); |
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String tagName = parser.getName();
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if( tagName.equalsIgnoreCase(CLASS_DESCRIPTION_TAG)) {
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values.put(CLASS_DESCRIPTION_TAG, parser.nextText()); |
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} else if( tagName.equalsIgnoreCase(CLASS_NAME_TAG)) { |
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values.put(CLASS_NAME_TAG, parser.nextText()); |
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} else if( tagName.equalsIgnoreCase(CLASS_NAMESPACE_TAG)) { |
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values.put(CLASS_NAMESPACE_TAG, parser.nextText()); |
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} else if( tagName.equalsIgnoreCase(CLASS_SUPERCLASSNAMES_TAG) ) { |
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(CLASS_SUPERCLASSNAMES_TAG))) {
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checkEndDocument(parser); |
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parser.require(XmlPullParser.START_TAG, "", CLASS_SUPERCLASSNAME_TAG);
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superClassNames.add(parser.nextText()); |
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parser.require(XmlPullParser.END_TAG, null, CLASS_SUPERCLASSNAME_TAG);
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parser.nextTag(); |
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} |
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} else if( tagName.equalsIgnoreCase(CLASS_EXTENDS_TAG) ) { // == CLASS_SUPERCLASSNAMES_TAG |
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(CLASS_EXTENDS_TAG))) {
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checkEndDocument(parser); |
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parser.require(XmlPullParser.START_TAG, "", CLASS_EXTENDS_CLASS_TAG);
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superClassNames.add(parser.nextText()); |
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parser.require(XmlPullParser.END_TAG, null, CLASS_EXTENDS_CLASS_TAG);
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parser.nextTag(); |
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} |
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} else {
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break;
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} |
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parser.require(XmlPullParser.END_TAG, null, tagName);
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.START_TAG, null, CLASS_FIELDS_TAG);
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parser.nextTag(); |
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//
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// Create dynclass
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//
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if( values.get(CLASS_NAME_TAG) == null ) { |
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throw new BadDefinitionFormatException(); |
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} |
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dynClass = manager.createDynClass( |
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(String)values.get(CLASS_NAMESPACE_TAG),
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(String)values.get(CLASS_NAME_TAG),
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(String)values.get(CLASS_DESCRIPTION_TAG)
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); |
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for( int i=0; i<superClassNames.size(); i++) { |
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dynClass.extend((String)superClassNames.get(i));
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} |
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//
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// Parse and load fields of dynclass
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//
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(CLASS_FIELDS_TAG))) {
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checkEndDocument(parser); |
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importDynField(parser, dynClass, loader); |
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.END_TAG, null, CLASS_FIELDS_TAG);
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parser.nextTag(); |
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parser.require(XmlPullParser.END_TAG, null, CLASS_TAG);
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parser.nextTag(); |
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return dynClass;
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} |
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private void importDynField(XmlPullParser parser, DynClass dynClass, ClassLoader loader) throws XmlPullParserException, IOException { |
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DynField field; |
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List availableValues = new ArrayList(); |
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Map values = new HashMap(); |
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parser.require(XmlPullParser.START_TAG, null, FIELD_TAG);
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//
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// Collect field attributes from tag attributes
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//
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for( int i=0; i<parser.getAttributeCount(); i++ ) { |
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values.put(parser.getAttributeName(i), parser.getAttributeValue(i)); |
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} |
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parser.nextTag(); |
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//
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// Collect field attributes from tags
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//
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(FIELD_TAG))) {
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checkEndDocument(parser); |
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parser.require(XmlPullParser.START_TAG, null, null); |
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String name = parser.getName();
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if( name.equalsIgnoreCase(FIELD_NAME_TAG)) {
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values.put(FIELD_NAME_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_DESCRIPTION_TAG)) { |
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values.put(FIELD_DESCRIPTION_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_TYPE_TAG)) { |
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values.put(FIELD_TYPE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_SUBTYPE_TAG)) { |
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values.put(FIELD_SUBTYPE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_GROUP_TAG)) { |
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values.put(FIELD_GROUP_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_ORDER_TAG)) { |
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values.put(FIELD_ORDER_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_ISMANDATORY_TAG)) { |
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values.put(FIELD_ISMANDATORY_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_ISPERSISTENT_TAG)) { |
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values.put(FIELD_ISPERSISTENT_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_MINVALUE_TAG)) { |
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values.put(FIELD_MINVALUE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_MAXVALUE_TAG)) { |
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values.put(FIELD_MAXVALUE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_CLASSOFVALUE_TAG)) { |
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values.put(FIELD_CLASSOFVALUE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_DEFAULTVALUE_TAG)) { |
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values.put(FIELD_DEFAULTVALUE_TAG, parser.nextText()); |
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} else if( name.equalsIgnoreCase(FIELD_AVALILABLEVALUES_TAG)) { |
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(FIELD_AVALILABLEVALUES_TAG))) {
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checkEndDocument(parser); |
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availableValues.add(importValueItem(parser)); |
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parser.nextTag(); |
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} |
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} else {
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break;
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} |
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parser.require(XmlPullParser.END_TAG, null, name);
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.END_TAG, null, FIELD_TAG);
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if( values.get(FIELD_NAME_TAG)==null ) { |
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throw new BadDefinitionFormatException(); |
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} |
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//
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// Create the field
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//
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field = dynClass.addDynField((String)values.get(FIELD_NAME_TAG));
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//
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// Load values in the field
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//
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Iterator names = values.keySet().iterator();
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while( names.hasNext() ) {
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String name = (String) names.next(); |
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String value = (String)values.get(name); |
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if( name.equalsIgnoreCase(FIELD_DESCRIPTION_TAG)) {
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field.setDescription(value); |
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} else if( name.equalsIgnoreCase(FIELD_TYPE_TAG)) { |
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field.setType( ToolsLocator.getDataTypesManager().getType(value) ); |
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} else if( name.equalsIgnoreCase(FIELD_SUBTYPE_TAG)) { |
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field.setSubtype(value); |
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} else if( name.equalsIgnoreCase(FIELD_GROUP_TAG)) { |
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field.setGroup(value); |
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} else if( name.equalsIgnoreCase(FIELD_ORDER_TAG)) { |
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field.setOrder( Integer.parseInt(value));
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} else if( name.equalsIgnoreCase(FIELD_ISMANDATORY_TAG)) { |
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field.setMandatory(Boolean.parseBoolean(value));
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} else if( name.equalsIgnoreCase(FIELD_ISPERSISTENT_TAG)) { |
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field.setPersistent(Boolean.parseBoolean(value));
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} else if( name.equalsIgnoreCase(FIELD_CLASSOFVALUE_TAG)) { |
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try {
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field.setClassOfValue( Class.forName(value, true, loader) ); |
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} catch (DynFieldIsNotAContainerException e) {
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throw new IncompatibleAttributeValueException(parser, FIELD_NAME_TAG); |
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} catch (ClassNotFoundException e) { |
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throw new CantLocateClassException(parser, FIELD_NAME_TAG); |
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} |
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} else if( name.equalsIgnoreCase(FIELD_MINVALUE_TAG)) { |
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// Do nothing
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} else if( name.equalsIgnoreCase(FIELD_MAXVALUE_TAG)) { |
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// Do nothing
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} else if( name.equalsIgnoreCase(FIELD_DEFAULTVALUE_TAG)) { |
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// Do nothing
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} else if( name.equalsIgnoreCase(FIELD_AVALILABLEVALUES_TAG)) { |
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// Do nothing
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} else if( name.equalsIgnoreCase(FIELD_NAME_TAG)) { |
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// Do nothing
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} else {
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throw new BadDefinitionFormatException(); |
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} |
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} |
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try {
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//
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// Coerce the the min/max/default/available values to the type of
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// the field
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//
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for (int i = 0; i < availableValues.size(); i++) { |
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PairValueLabel pair = (PairValueLabel) availableValues.get(i); |
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if (pair.label == null) { |
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if (pair.value == null) { |
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pair.label = "null";
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} else {
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pair.label = pair.value.toString(); |
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} |
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} |
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availableValues.set(i, new DynObjectValueItem(field.coerce(pair.value), pair.label));
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} |
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field.setAvailableValues(availableValues); |
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field.setMaxValue(field.coerce(values.get(FIELD_MAXVALUE_TAG))); |
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field.setMinValue(field.coerce(values.get(FIELD_MINVALUE_TAG))); |
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field.setDefaultDynValue(field.coerce(values.get(FIELD_DEFAULTVALUE_TAG))); |
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} catch (CoercionException e) {
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throw new ParseCoerceException(e, parser); |
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} |
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} |
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private class PairValueLabel { |
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String label=null; |
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String value=null; |
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} |
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private PairValueLabel importValueItem(XmlPullParser parser) throws XmlPullParserException, IOException { |
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PairValueLabel pair = new PairValueLabel();
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if( parser.getName().equalsIgnoreCase(VALUEITEM_TAG)) {
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parser.require(XmlPullParser.START_TAG, null, VALUEITEM_TAG);
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for( int i=0; i<parser.getAttributeCount(); i++) { |
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String name = parser.getAttributeName(i);
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if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
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pair.label = parser.getAttributeValue(i); |
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} else if( name.equalsIgnoreCase(VALUEITEM_VALUE_TAG)) { |
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pair.value = parser.getAttributeValue(i); |
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} else {
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// FIXME: throw exception
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} |
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} |
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parser.nextTag(); |
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while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
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parser.getName().equals(VALUEITEM_TAG))) {
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checkEndDocument(parser); |
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parser.require(XmlPullParser.START_TAG, null, null); |
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String name = parser.getName();
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if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
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pair.label = parser.nextText(); |
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} else if( name.equalsIgnoreCase(VALUEITEM_VALUE_TAG)) { |
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pair.value = parser.nextText(); |
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} else {
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break;
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} |
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parser.require(XmlPullParser.END_TAG, null, name);
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.END_TAG, null, VALUEITEM_TAG);
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} else {
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parser.require(XmlPullParser.START_TAG, null, VALUEITEM_VALUE_TAG);
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for( int i=0; i<parser.getAttributeCount(); i++) { |
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String name = parser.getAttributeName(i);
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if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
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pair.label = parser.getAttributeValue(i); |
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} else {
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// FIXME: throw exception
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} |
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} |
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pair.value = parser.nextText(); |
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parser.require(XmlPullParser.END_TAG, null, VALUEITEM_VALUE_TAG);
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} |
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return pair;
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} |
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private void checkEndDocument(XmlPullParser parser) throws XmlPullParserException { |
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if (parser.getEventType() == XmlPullParser.END_DOCUMENT) {
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throw new BadDefinitionFormatException(); |
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} |
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|
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} |
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public static class DuplicateDynClassException extends RuntimeException { |
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/**
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*
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*/
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private static final long serialVersionUID = 3653024321140806121L; |
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|
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public DuplicateDynClassException(XmlPullParser parser, String name) { } |
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} |
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|
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public static class BadDefinitionFormatException extends RuntimeException { |
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/**
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*
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*/
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private static final long serialVersionUID = -808282903423455613L; |
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|
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public BadDefinitionFormatException() { }
|
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} |
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|
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public static class CantLocateClassException extends RuntimeException { |
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/**
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*
|
| 458 |
*/
|
| 459 |
private static final long serialVersionUID = 5733585544096433612L; |
| 460 |
|
| 461 |
public CantLocateClassException(XmlPullParser parser, String tagname) { } |
| 462 |
} |
| 463 |
|
| 464 |
public static class IncompatibleAttributeValueException extends RuntimeException { |
| 465 |
/**
|
| 466 |
*
|
| 467 |
*/
|
| 468 |
private static final long serialVersionUID = 2646530094487375049L; |
| 469 |
|
| 470 |
public IncompatibleAttributeValueException(XmlPullParser parser, String tagname) { } |
| 471 |
} |
| 472 |
|
| 473 |
public static class ParseCoerceException extends RuntimeException { |
| 474 |
|
| 475 |
/**
|
| 476 |
*
|
| 477 |
*/
|
| 478 |
private static final long serialVersionUID = 1447718822981628834L; |
| 479 |
|
| 480 |
public ParseCoerceException(Throwable cause, XmlPullParser parser) { } |
| 481 |
} |
| 482 |
|
| 483 |
|
| 484 |
} |