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package com.sun.jdi;


An entity declared within a user defined type (class or interface). This interface is the root of the type component hierarchy which includes Field and Method. Type components of the same name declared in different classes (including those related by inheritance) have different TypeComponent objects. TypeComponents can be used alone to retrieve static information about their declaration, or can be used in conjunction with a ReferenceType or ObjectReference to access values or invoke, as applicable. 
Author:Robert Field, Gordon Hirsch, James McIlree
Since: 1.3
/**
 * An entity declared within a user defined
 * type (class or interface).
 * This interface is the root of the type
 * component hierarchy which
 * includes {@link Field} and {@link Method}.
 * Type components of the same name declared in different classes
 * (including those related by inheritance) have different
 * TypeComponent objects.
 * TypeComponents can be used alone to retrieve static information
 * about their declaration, or can be used in conjunction with a
 * {@link ReferenceType} or {@link ObjectReference} to access values
 * or invoke, as applicable.
 *
 * @author Robert Field
 * @author Gordon Hirsch
 * @author James McIlree
 * @since  1.3
 */
public interface TypeComponent extends Mirror, Accessible {

    
Gets the name of this type component.


Note: for fields, this is the field name; for methods,
this is the method name; for constructors, this is <init>;
for static initializers, this is <clinit>.

Returns:a string containing the name.
/**
     * Gets the name of this type component.
     * <P>
     * Note: for fields, this is the field name; for methods,
     * this is the method name; for constructors, this is &lt;init&gt;;
     * for static initializers, this is &lt;clinit&gt;.
     *
     * @return a string containing the name.
     */
    String name();

    
Gets the JNI-style signature for this type component. The signature is encoded type information as defined in the JNI documentation. It is a convenient, compact format for for manipulating type information internally, not necessarily for display to an end user. See Field.typeName and Method.returnTypeName for ways to help get a more readable representation of the type. 
See Also:
Returns:a string containing the signature
/**
     * Gets the JNI-style signature for this type component. The
     * signature is encoded type information as defined
     * in the JNI documentation. It is a convenient, compact format for
     * for manipulating type information internally, not necessarily
     * for display to an end user. See {@link Field#typeName} and
     * {@link Method#returnTypeName} for ways to help get a more readable
     * representation of the type.
     *
     * @see <a href="doc-files/signature.html">Type Signatures</a>
     * @return a string containing the signature
     */
    String signature();

    
Gets the generic signature for this TypeComponent if there is one.
Generic signatures are described in the
The Java™ Virtual Machine Specification.

Returns:a string containing the generic signature, or null
if there is no generic signature.
Since:1.5
/**
     * Gets the generic signature for this TypeComponent if there is one.
     * Generic signatures are described in the
     * <cite>The Java&trade; Virtual Machine Specification</cite>.
     *
     * @return a string containing the generic signature, or <code>null</code>
     * if there is no generic signature.
     *
     * @since 1.5
     */
    String genericSignature();

    
Returns the type in which this component was declared. The returned ReferenceType mirrors either a class or an interface in the target VM. 
Returns:a ReferenceType for the type that declared this type component.
/**
     * Returns the type in which this component was declared. The
     * returned {@link ReferenceType} mirrors either a class or an
     * interface in the target VM.
     *
     * @return a {@link ReferenceType} for the type that declared
     * this type component.
     */
    ReferenceType declaringType();

    
Determines if this TypeComponent is static.
Return value is undefined for constructors and static initializers.

Returns:true if this type component was declared
static; false otherwise.
/**
     * Determines if this TypeComponent is static.
     * Return value is undefined for constructors and static initializers.
     *
     * @return <code>true</code> if this type component was declared
     * static; false otherwise.
     */
    boolean isStatic();

    
Determines if this TypeComponent is final.
Return value is undefined for constructors and static initializers.

Returns:true if this type component was declared
final; false otherwise.
/**
     * Determines if this TypeComponent is final.
     * Return value is undefined for constructors and static initializers.
     *
     * @return <code>true</code> if this type component was declared
     * final; false otherwise.
     */
    boolean isFinal();

    
Determines if this TypeComponent is synthetic. Synthetic members
are generated by the compiler and are not present in the source
code for the containing class.

 Not all target VMs support this query. See VirtualMachine.canGetSyntheticAttribute to determine if the operation is supported. 
Throws:
Returns:true if this type component is synthetic;
false otherwise.
/**
     * Determines if this TypeComponent is synthetic. Synthetic members
     * are generated by the compiler and are not present in the source
     * code for the containing class.
     * <p>
     * Not all target VMs support this query. See
     * {@link VirtualMachine#canGetSyntheticAttribute} to determine if the
     * operation is supported.
     *
     * @return <code>true</code> if this type component is synthetic;
     * <code>false</code> otherwise.
     * @throws java.lang.UnsupportedOperationException if the target
     * VM cannot provide information on synthetic attributes.
     */
    boolean isSynthetic();
}