ContentModelGroup

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package org.exolab.castor.xml.schema;

import java.util.Enumeration;

/**
 * An XML Schema ModelGroup.
 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
 * @version $Revision$ $Date: 2006-04-14 04:14:43 -0600 (Fri, 14 Apr 2006) $
**/
public interface ContentModelGroup {

    /**
     * Adds the given ElementDecl to this ContentModelGroup.
     * @param elementDecl the ElementDecl to add
     * @exception SchemaException when an ElementDecl already
     * exists with the same name as the given ElementDecl
    **/
    void addElementDecl(ElementDecl elementDecl)
        throws SchemaException;

    /**
     * Removes the given ElementDecl from this ContentModelGroup.
     * @param elementDecl the ElementDecl to remove.
     * @return true if the element has been successfully removed, false otherwise.
     */
    boolean removeElementDecl(ElementDecl elementDecl);

    /**
     * Adds the given {@link Group} to this {@link ContentModelGroup}.
     * @param group the Group to add
     * @exception SchemaException when a group with the same name as the
     * specified group already exists in the current scope
    **/
    void addGroup(Group group) throws SchemaException;

    /**
     * Removes the given {@link Group} from this {@link ContentModelGroup}.
     * @param group the Group to remove.
     * @return true if the group has been successfully removed, false otherwise.
     */
    boolean removeGroup(Group group);

    /**
     * Adds the given {@link ModelGroup} definition to this {@link ContentModelGroup}.
     * @param group the ModelGroup to add
     * @exception SchemaException when a group with the same name as the
     * specified group already exists in the current scope
    **/
    void addGroup(ModelGroup group) throws SchemaException;

    /**
     * Removes the given {@link ModelGroup} definition from this {@link ContentModelGroup}.
     * @param group the {@link ModelGroup} definition to remove.
     * @return true if the group has been successfully removed, false otherwise.
     */
    boolean removeGroup(ModelGroup group);

    /**
     * Adds the given {@link Wildcard} to this {@link ContentModelGroup}.
     * @param wilcard the {@link Wildcard} to add
     * @exception SchemaException when the {@link Wildcard} is &lt;anyAttribute> and
     * not &lt;any>
     */
    void addWildcard(Wildcard wilcard) throws SchemaException;

    /**
     * Removes the given {@link Wildcard} from this {@link ContentModelGroup}.
     * @param wildcard the {@link Wildcard} to remove.
     * @return true if the given {@link Wildcard} has been successfully removed, false otherwise.
     */
    boolean removeWildcard(Wildcard wildcard);

    /**
     * Returns an enumeration of all the {@link Particle}s contained
     * within this {@link ContentModelGroup}.
     *
     * @return an enumeration of all the {@link Particle}s contained
     * within this {@link ContentModelGroup}
    **/
    Enumeration enumerate();

    /**
     * Returns the element declaration with the given name, or null if no
     * element declaration with that name exists in this
     * {@link ContentModelGroup}.
     *
     * @param name the name of the element.
     * @return the {@link ElementDecl} with the given name, or null if no
     * ElementDecl exists in this {@link ContentModelGroup}.
    **/
    ElementDecl getElementDecl(String name);

    /**
     * Returns the maximum number of occurrences that this ContentModelGroup
     * may appear.
     * @return the maximum number of occurrences that this ContentModelGroup
     * may appear.
     * A non positive (n < 1) value indicates that the
     * value is unspecified (ie. unbounded).
    **/
    int getMaxOccurs();

    /**
     * Returns the minimum number of occurrences that this ContentModelGroup
     * must appear.
     * @return the minimum number of occurrences that this ContentModelGroup
     * must appear
     * A negative (n < 0) value indicates that the value is unspecified.
    **/
    int getMinOccurs();

    /**
     * Returns the number of particles contained within
     * this {@link ContentModelGroup}.
     *
     * @return the number of particles
    **/
    int getParticleCount();

    /**
     * Returns the {@link Particle} at the specified index.
     * @param index the index of the {@link Particle} to return
     * @return the CMParticle at the specified index
    **/
    Particle getParticle(int index);

}