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package com.sun.jersey.json.impl;

import java.lang.reflect.Type;
import java.util.Collection;
import java.util.Map;

import javax.xml.namespace.QName;

/**
 * Provides XML structure information (expected elements/attributes) about JAXB element classes that are being unmarshalled.
 * 

* Implementations of this interface are notified about the change of currently processed element via methods {@link * #startElement(javax.xml.namespace.QName)} and {@link #endElement(javax.xml.namespace.QName)} where the {@code QName} is * represented by the element name. *

* Note: This class is designed to support the unmarshalling JSONs in natural notation since the parser does not have other * means to decide whether the entities of currently processed element belongs to either to the group of elements or to the * group of attributes. * * @author Michal Gajdos (michal.gajdos at oracle.com) */ public interface JaxbXmlDocumentStructure { /** * Notifies this structure provider that a start element event with the given name has been fired and that this element * will be processed. * * @param name name of the element that will be processed. */ public void startElement(final QName name); /** * Notifies this structure provider that an end element event has been fired and that the parent element of the one with * the given name should be processed. * * @param name name of the ending element. */ public void endElement(final QName name); /** * Returns {@code true} if the implementation is capable of handling and providing information about attributes ({@code * #getExpectedAttributes} and {@code #getExpectedAttributesMap} return valid results), {@code false} otherwise. * * @return {@code true} if expected attributes can be obtained, {@code false} otherwise. */ public boolean canHandleAttributes(); /** * Notifies this structure provider about an attribute event with the given name has been fired and that this attribute * will be processed. * * @param attributeName name of the attribute that will be processed. * @param value value of the attribute. */ public void handleAttribute(QName attributeName, String value); /** * Returns the {@link Type} of entity (element, attribute) with the given name. The given entity name is expected to be either * name of the current element or name of it's direct child. * * @param entityName name of the entity to retrieve the {@code Type} for. * @param isAttribute flag whether the requested entity is an attribute or not. * @return type of the entity or {@code null} if the entity cannot be retrieved from the structure. */ public Type getEntityType(QName entityName, boolean isAttribute); /** * Returns the {@link Type} of individuals stored in an array/list. *

* Note: This method should be called only if an invocation of {@link #getEntityType(javax.xml.namespace.QName, boolean)} * returns a collection/array type. * * @return type of the entity or {@code null} if the entity cannot be retrieved from the structure. */ public Type getIndividualType(); /** * Returns a collection of expected attributes of currently processed element. * * @return a collection of expected attributes. */ public Collection getExpectedAttributes(); /** * Returns a map of expected attributes of currently processed element where {@code key} is represented by the local * name of the attribute and {@code value} is it's qualified name. * * @return a map of expected attributes. */ public Map getExpectedAttributesMap(); /** * Returns a collection of expected sub-elements of currently processed element. * * @return a collection of expected sub-elements. */ public Collection getExpectedElements(); /** * Returns a map of expected sub-elements of currently processed element where {@code key} is represented by the local * name of the sub-element and {@code value} is it's qualified name. * * @return a map of expected sub-elements. */ public Map getExpectedElementsMap(); /** * Returns {@code true} if the currently processed element should represent an JSON array element. * * @return {@code true} if the element is an JSON array element, {@code false} otherwise. */ public boolean isArrayCollection(); /** * Returns {@code true} if the currently processed element belongs to the same JSON array as the previous element. * * @return {@code true} if the element is an JSON array belongs to the same JSON array as the previous element, * {@code false} otherwise. */ public boolean isSameArrayCollection(); /** * Returns {@code true} if JAXB bean of the currently processed element can contain any subelements. * * @return {@code true} if JAXB bean of the currently processed element can contain any subelements, * {@code false} otherwise. */ public boolean hasSubElements(); }





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