BindingComponent

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package org.exolab.castor.builder;

import org.exolab.castor.builder.binding.xml.EnumBindingType;
import org.exolab.castor.builder.types.XSType;

/**
 * This interface is the abstraction of any type of source that can interact with the Source Code
 * Generator. From the Source Code Generator point of view, the source document used to generate
 * Java source code is totally transparent and is not exposed.
 * <p>
 * Specific implementation of that class will represent the source document used. For instance when
 * generating source code from an XML Schema, the source generator will interact with an
 * {@link org.exolab.castor.builder.binding.XMLBindingComponent} whereas when generating source code
 * from an UML model object model, the source generator will interact with an UMLBindingComponent
 * (This is obviously just an example, no UML Object Model has been as of today integrated in
 * Castor).
 * <p>
 * A binding component can be of three different types:
 * <ul>
 * <li>MEMBER: this type of BindingComponent will represent a java class member.</li>
 * <li>INTERFACE: this type of BindingComponent will represent a java interface.</li>
 * <li>CLASS: this type of BindingComponent will represent a java class.</li>
 * </ul>
 *
 * @author <a href="mailto:blandin@intalio.com">Arnaud Blandin</a>
 * @version $Revision$ $Date: 2005-03-05 06:42:06 -0700 (Sat, 05 Mar 2005) $
 */
public interface BindingComponent {

  /** An interface binding component. */
  short INTERFACE = 0;
  /** A class binding component. */
  short CLASS = 1;
  /** A member binding component. */
  short MEMBER = 2;
  /** An enum binding component. */
  short ENUM_TYPE = 3;
  /** A content member binding component. */
  short CONTENT_MEMBER_TYPE = 4;

  /**
   * Returns true if the given Object is equal to this instance of BindingComponent.
   *
   * @param object the object to compare to this instance
   * @return true if the given Object is equal to this instance of BindingComponent.
   * @see java.lang.Object#equals(java.lang.Object)
   */
  boolean equals(Object object);

  /**
   * Returns the name of collection type such as 'arraylist' in which we will store the different
   * occurrences of the java member generated to represent that BindingComponent.
   *
   * @return a string that represents the collection type such as 'arraylist' name in which we will
   *         store the different occurrences of the java member generated to represent that
   *         BindingComponent.
   */
  String getCollectionType();

  /**
   * Returns the name of a super class for the current BindingComponent. Null is returned if this
   * BindingComponent is not meant to be mapped to a java class.
   *
   * @return the name of a super class for the current BindingComponent. Null is returned if this
   *         BindingComponent is not meant to be mapped to a java class.
   */
  String getExtends();

  /**
   * Returns an array of the different interface names implemented by the class that will represent
   * the current BindingComponent. Null is returned if this BindingComponent is not meant to be
   * mapped to a java class.
   *
   * @return an array of the different interface names implemented by the class that will represent
   *         the current BindingComponent. Null is returned if this BindingComponent is not meant to
   *         be mapped to a java class.
   */
  String[] getImplements();

  /**
   * Returns a valid Java Class Name corresponding to this BindingComponent. This name is not
   * qualified, this is only a local Java class name.
   *
   * @return a valid Java Class Name corresponding to this BindingComponent. This name is not
   *         qualified, this is only a local Java class name.
   * @see #getQualifiedName
   */
  String getJavaClassName();

  /**
   * Returns a valid Java Member Name corresponding to this BindingComponent. This name is not
   * qualified, this is only a local Java Member name.
   *
   * @return a valid Java Member Name corresponding to this BindingComponent. This name is not
   *         qualified, this is only a local Java member name.
   * @see #getQualifiedName
   */
  String getJavaMemberName();

  /**
   * Returns the java package associated with this BindingComponent.
   *
   * @return the java package associated with this BindingComponent.
   */
  String getJavaPackage();

  /**
   * Returns the XSType that corresponds to the Java type chosen to represent this BindingComponent.
   * An XSType is an abstraction of a Java type used in the Source Generator. It wraps a JType as
   * well as the necessary methods to convert to/from String.
   *
   * @return an XSType that corresponds to the Java type chosen to represent this BindingComponent.
   */
  XSType getJavaType();

  /**
   * Returns the lower bound of the collection that is generated from this BindingComponent. The
   * lower bound is a positive integer.
   *
   * @return an int representing the lower bound of the collection generated from this
   *         BindingComponent.
   */
  int getLowerBound();

  /**
   * Returns a fully qualified java class name. This name corresponds to the class name that will be
   * generated from this BindingComponent.
   *
   * @return a fully qualified java class name. This name corresponds to the class name
   *         corresponding to this BindingComponent.
   */
  String getQualifiedName();

  /**
   * Returns the type of this component binding. A component binding can be of three different
   * types:
   * <ul>
   * <li>Interface: it represents the binding to a java interface.</li>
   * <li>Class: it represents the binding to a java class.</li>
   * <li>Member: it represents the binding to a java class member.</li>
   * </ul>
   * -1 is returned if the component binding is null.
   *
   * @return the type of this component binding.
   */
  short getType();

  /**
   * Returns the upper bound of the collection that is generated from this BindingComponent. The
   * upper bound is a positive integer. -1 is returned to indicate that the upper bound is
   * unbounded.
   *
   * @return an int representing the lower bound of the collection generated from this
   *         BindingComponent. -1 is returned to indicate that the upper bound is uinbounded.
   */
  int getUpperBound();

  /**
   * Returns the default value of the member generated from this binding component. The value is
   * returned as its string representation.
   *
   * @return a string representation of default value for the member generated from this binding
   *         component.
   */
  String getValue();

  /**
   * Returns the fully qualified name of the Validator to use.
   *
   * @return the fully qualified name of the Validator to use.
   */
  String getValidator();

  /**
   * Returns the EnumBindingType instance for the active binding component.
   *
   * @return The EnumBindingType instance
   */
  EnumBindingType getEnumBinding();

  /**
   * Returns the fully qualified name of the XMLFieldHandler to use. This handler will be used when
   * generating ClassDescriptors meant to be used in the marshalling framework.
   *
   * @return the fully qualified name of the XMLFieldHandler to use.
   */
  String getXMLFieldHandler();

  /**
   * Returns true if bound properties must be generated for the class that will represent the
   * current BindingComponent.
   *
   * @return true if bound properties must be generated for the class the class that will represent
   *         the current BindingComponent.
   */
  boolean hasBoundProperties();

  /**
   * Returns true if equal method must be generated for the class that will represent the current
   * BindingComponent.
   *
   * @return true if equal method must be generated for the class the class that will represent the
   *         current BindingComponent.
   */
  boolean hasEquals();

  /**
   * Returns the hashCode value for this object.
   *
   * @return the hashcode value for this object.
   * @see java.lang.Object#hashCode()
   */
  int hashCode();

  /**
   * Returns true if the class generated from the current BindingComponent will be abstract.
   *
   * @return true if the class generated from the current BindingComponent will be abstract.
   */
  boolean isAbstract();

  /**
   * Returns true if the class generated from the current BindingComponent will be final.
   *
   * @return true if the class generated from the current BindingComponent will be final.
   */
  boolean isFinal();

  /**
   * Returns true if the member represented by that BindingComponent is to be represented by an
   * Object wrapper. For instance an int will be represented by a java Integer if the property is
   * set to true.
   *
   * @return true if the member represented by that BindingComponent is to be represented by an
   *         Object wrapper.
   */
  boolean useWrapper();

}