gvsig-tools / org.gvsig.tools / library / trunk / org.gvsig.tools / org.gvsig.tools.lib / src / main / java / org / gvsig / tools / dynobject / impl / DynClassImportHelper.java @ 130
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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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import org.xmlpull.v1.XmlPullParserFactory; |
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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 FIELD_HIDDEN_TAG = "hidden"; |
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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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private String getNullWhenEmptyString(String value) { |
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if( value!= null ) { |
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if( value.trim().length()==0) { |
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return null; |
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} |
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} |
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return value;
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|
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} |
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private String nextText(XmlPullParser parser) throws XmlPullParserException, IOException { |
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return getNullWhenEmptyString(parser.nextText());
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} |
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private String getAttributeValue(XmlPullParser parser, int i) throws XmlPullParserException, IOException { |
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return getNullWhenEmptyString(parser.getAttributeValue(i));
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} |
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public Map importDefinitions(InputStream resource, ClassLoader loader, String defaultNamespace) throws XmlPullParserException, IOException { |
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XmlPullParserFactory factory = XmlPullParserFactory.newInstance( |
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ToolsLocator.getInstance().getXmlPullParserFactoryClassNames(), |
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null);
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XmlPullParser parser = factory.newPullParser(); |
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parser.setInput(resource, null);
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return importDefinitions(parser, loader, defaultNamespace);
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} |
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public Map importDefinitions(XmlPullParser parser, ClassLoader loader, String defaultNamespace) 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 = this.getAttributeValue(parser, i);
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} else {
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throw new WrongVersionException(parser); |
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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, defaultNamespace, dynClasses); |
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if( dynClasses.get(dynClass.getFullName())!=null ) { |
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throw new DuplicateDynClassException(parser, dynClass.getFullName()); |
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} |
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dynClasses.put(dynClass.getFullName(), 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, String defaultNamespace, Map classes) throws XmlPullParserException, IOException { |
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DynObjectManager manager = ToolsLocator.getDynObjectManager(); |
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DynClass dynClass; |
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List superClasses = 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), this.getAttributeValue(parser, 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, this.nextText(parser));
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} else if( tagName.equalsIgnoreCase(CLASS_NAME_TAG)) { |
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values.put(CLASS_NAME_TAG, this.nextText(parser));
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} else if( tagName.equalsIgnoreCase(CLASS_NAMESPACE_TAG)) { |
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values.put(CLASS_NAMESPACE_TAG, this.nextText(parser));
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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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superClasses.add( new SuperClass(defaultNamespace, this.nextText(parser))); |
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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) ) { |
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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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superClasses.add( importSuperClass(parser, defaultNamespace) ); |
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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(parser); |
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} |
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if( values.get(CLASS_NAMESPACE_TAG)==null ) { |
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values.put(CLASS_NAMESPACE_TAG, defaultNamespace); |
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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<superClasses.size(); i++) { |
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SuperClass superClass = (SuperClass) superClasses.get(i); |
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if( superClass.name == null ) { |
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throw new BadDefinitionFormatException(parser); |
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} |
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DynClass superDynClass = (DynClass) classes.get(DefaultDynObjectManager.getFullName(superClass.namespace, superClass.name)); |
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if( superDynClass==null ) { |
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superDynClass = ToolsLocator.getDynObjectManager().get(superClass.namespace, superClass.name); |
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if( superDynClass==null ) { |
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throw new CantLocateDynClassException(parser,DefaultDynObjectManager.getFullName(superClass.namespace, superClass.name)); |
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} |
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} |
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dynClass.extend(superDynClass); |
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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 class SuperClass { |
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String namespace;
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String name;
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SuperClass(String namespace, String name) { |
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this.namespace = namespace;
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this.name = name;
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} |
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} |
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private SuperClass importSuperClass(XmlPullParser parser, String defaultNamespace) throws XmlPullParserException, IOException { |
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SuperClass superClass = new SuperClass(defaultNamespace, null); |
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parser.require(XmlPullParser.START_TAG, null, CLASS_EXTENDS_CLASS_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(CLASS_NAME_TAG)) {
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superClass.name = this.getAttributeValue(parser, i);
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} else if( name.equalsIgnoreCase(CLASS_NAMESPACE_TAG)) { |
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superClass.namespace = this.getAttributeValue(parser, i);
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} else {
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throw new BadDefinitionFormatException(parser); |
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} |
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} |
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if( superClass.name == null) { |
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superClass.name = this.nextText(parser);
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} else {
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parser.nextTag(); |
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} |
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parser.require(XmlPullParser.END_TAG, null, CLASS_EXTENDS_CLASS_TAG);
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return superClass;
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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), this.getAttributeValue(parser, 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, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_DESCRIPTION_TAG)) { |
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values.put(FIELD_DESCRIPTION_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_TYPE_TAG)) { |
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values.put(FIELD_TYPE_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_SUBTYPE_TAG)) { |
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values.put(FIELD_SUBTYPE_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_GROUP_TAG)) { |
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values.put(FIELD_GROUP_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_ORDER_TAG)) { |
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values.put(FIELD_ORDER_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_ISMANDATORY_TAG)) { |
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values.put(FIELD_ISMANDATORY_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_ISPERSISTENT_TAG)) { |
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values.put(FIELD_ISPERSISTENT_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_MINVALUE_TAG)) { |
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values.put(FIELD_MINVALUE_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_MAXVALUE_TAG)) { |
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values.put(FIELD_MAXVALUE_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_CLASSOFVALUE_TAG)) { |
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values.put(FIELD_CLASSOFVALUE_TAG, this.nextText(parser));
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} else if( name.equalsIgnoreCase(FIELD_DEFAULTVALUE_TAG)) { |
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values.put(FIELD_DEFAULTVALUE_TAG, this.nextText(parser));
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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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|
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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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|
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if( values.get(FIELD_NAME_TAG)==null ) { |
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throw new BadDefinitionFormatException(parser); |
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} |
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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( value == null ) { |
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continue;
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} |
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if( name.equalsIgnoreCase(FIELD_DESCRIPTION_TAG)) {
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field.setDescription(value); |
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|
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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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|
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} else if( name.equalsIgnoreCase(FIELD_SUBTYPE_TAG)) { |
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field.setSubtype(value); |
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|
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} else if( name.equalsIgnoreCase(FIELD_GROUP_TAG)) { |
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field.setGroup(value); |
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|
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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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|
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} else if( name.equalsIgnoreCase(FIELD_ISPERSISTENT_TAG)) { |
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field.setPersistent(Boolean.parseBoolean(value));
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|
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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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|
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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(parser); |
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} |
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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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|
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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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} |
| 454 |
|
| 455 |
private PairValueLabel importValueItem(XmlPullParser parser) throws XmlPullParserException, IOException { |
| 456 |
PairValueLabel pair = new PairValueLabel();
|
| 457 |
|
| 458 |
if( parser.getName().equalsIgnoreCase(VALUEITEM_TAG)) {
|
| 459 |
parser.require(XmlPullParser.START_TAG, null, VALUEITEM_TAG);
|
| 460 |
for( int i=0; i<parser.getAttributeCount(); i++) { |
| 461 |
String name = parser.getAttributeName(i);
|
| 462 |
if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
|
| 463 |
pair.label = this.getAttributeValue(parser,i);
|
| 464 |
} else if( name.equalsIgnoreCase(VALUEITEM_VALUE_TAG)) { |
| 465 |
pair.value = this.getAttributeValue(parser,i);
|
| 466 |
} else {
|
| 467 |
throw new BadDefinitionFormatException(parser); |
| 468 |
} |
| 469 |
} |
| 470 |
parser.nextTag(); |
| 471 |
|
| 472 |
while ( !( parser.getEventType() == XmlPullParser.END_TAG &&
|
| 473 |
parser.getName().equals(VALUEITEM_TAG))) {
|
| 474 |
checkEndDocument(parser); |
| 475 |
parser.require(XmlPullParser.START_TAG, null, null); |
| 476 |
String name = parser.getName();
|
| 477 |
if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
|
| 478 |
pair.label = this.nextText(parser);
|
| 479 |
} else if( name.equalsIgnoreCase(VALUEITEM_VALUE_TAG)) { |
| 480 |
pair.value = this.nextText(parser);
|
| 481 |
} else {
|
| 482 |
break;
|
| 483 |
} |
| 484 |
parser.require(XmlPullParser.END_TAG, null, name);
|
| 485 |
parser.nextTag(); |
| 486 |
} |
| 487 |
parser.require(XmlPullParser.END_TAG, null, VALUEITEM_TAG);
|
| 488 |
} else {
|
| 489 |
parser.require(XmlPullParser.START_TAG, null, VALUEITEM_VALUE_TAG);
|
| 490 |
for( int i=0; i<parser.getAttributeCount(); i++) { |
| 491 |
String name = parser.getAttributeName(i);
|
| 492 |
if( name.equalsIgnoreCase(VALUEITEM_LABEL_TAG)) {
|
| 493 |
pair.label = parser.getAttributeValue(i); |
| 494 |
} else {
|
| 495 |
throw new BadDefinitionFormatException(parser); |
| 496 |
} |
| 497 |
} |
| 498 |
pair.value = parser.nextText(); |
| 499 |
parser.require(XmlPullParser.END_TAG, null, VALUEITEM_VALUE_TAG);
|
| 500 |
} |
| 501 |
return pair;
|
| 502 |
} |
| 503 |
|
| 504 |
private void checkEndDocument(XmlPullParser parser) throws XmlPullParserException { |
| 505 |
if (parser.getEventType() == XmlPullParser.END_DOCUMENT) {
|
| 506 |
throw new BadDefinitionFormatException(parser); |
| 507 |
} |
| 508 |
|
| 509 |
} |
| 510 |
|
| 511 |
|
| 512 |
public static abstract class ImportDynClassesException extends RuntimeException { |
| 513 |
|
| 514 |
/**
|
| 515 |
*
|
| 516 |
*/
|
| 517 |
private static final long serialVersionUID = 3346283395112730192L; |
| 518 |
} |
| 519 |
|
| 520 |
public static class DuplicateDynClassException extends ImportDynClassesException { |
| 521 |
/**
|
| 522 |
*
|
| 523 |
*/
|
| 524 |
private static final long serialVersionUID = 3653024321140806121L; |
| 525 |
|
| 526 |
public DuplicateDynClassException(XmlPullParser parser, String name) { } |
| 527 |
} |
| 528 |
|
| 529 |
public static class BadDefinitionFormatException extends ImportDynClassesException { |
| 530 |
/**
|
| 531 |
*
|
| 532 |
*/
|
| 533 |
private static final long serialVersionUID = -808282903423455613L; |
| 534 |
|
| 535 |
public BadDefinitionFormatException(XmlPullParser parser) { }
|
| 536 |
} |
| 537 |
|
| 538 |
public static class CantLocateClassException extends ImportDynClassesException { |
| 539 |
/**
|
| 540 |
*
|
| 541 |
*/
|
| 542 |
private static final long serialVersionUID = 5733585544096433612L; |
| 543 |
|
| 544 |
public CantLocateClassException(XmlPullParser parser, String tagname) { } |
| 545 |
} |
| 546 |
|
| 547 |
public static class CantLocateDynClassException extends ImportDynClassesException { |
| 548 |
|
| 549 |
/**
|
| 550 |
*
|
| 551 |
*/
|
| 552 |
private static final long serialVersionUID = 6286170415562358806L; |
| 553 |
|
| 554 |
public CantLocateDynClassException(XmlPullParser parser, String tagname) { } |
| 555 |
} |
| 556 |
|
| 557 |
public static class IncompatibleAttributeValueException extends ImportDynClassesException { |
| 558 |
/**
|
| 559 |
*
|
| 560 |
*/
|
| 561 |
private static final long serialVersionUID = 2646530094487375049L; |
| 562 |
|
| 563 |
public IncompatibleAttributeValueException(XmlPullParser parser, String tagname) { } |
| 564 |
} |
| 565 |
|
| 566 |
public static class ParseCoerceException extends ImportDynClassesException { |
| 567 |
|
| 568 |
/**
|
| 569 |
*
|
| 570 |
*/
|
| 571 |
private static final long serialVersionUID = 1447718822981628834L; |
| 572 |
|
| 573 |
public ParseCoerceException(Throwable cause, XmlPullParser parser) { } |
| 574 |
} |
| 575 |
|
| 576 |
public static class WrongVersionException extends ImportDynClassesException { |
| 577 |
|
| 578 |
private static final long serialVersionUID = 6620589308398698367L; |
| 579 |
|
| 580 |
public WrongVersionException(XmlPullParser parser) { }
|
| 581 |
} |
| 582 |
|
| 583 |
|
| 584 |
} |