[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / core / ICompilationUnit.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.core;

import net.sourceforge.phpdt.internal.core.ImportContainer;

import org.eclipse.core.runtime.IProgressMonitor;



/**
 * Represents an entire Java compilation unit (<code>.java</code> source file).
 * Compilation unit elements need to be opened before they can be navigated or manipulated.
 * The children are of type <code>IPackageDeclaration</code>,
 * <code>IImportContainer</code>, and <code>IType</code>,
 * and appear in the order in which they are declared in the source.
 * If a <code>.java</code> file cannot be parsed, its structure remains unknown.
 * Use <code>IJavaElement.isStructureKnown</code> to determine whether this is 
 * the case.
 * <p>
 * This interface is not intended to be implemented by clients.
 * </p>
 */ 
public interface ICompilationUnit extends IJavaElement, ISourceReference, IParent, IOpenable, IWorkingCopy, ISourceManipulation {
//extends IJavaElement, ISourceReference, IParent, IOpenable, IWorkingCopy, ISourceManipulation, ICodeAssist {

        /**
         * Constant indicating that a reconcile operation should not return an AST.
         * @since 3.0
         */
        public static final int NO_AST = 0;

        /**
         * Changes this compilation unit handle into a working copy. A new <code>IBuffer</code> is
         * created using this compilation unit handle's owner. Uses the primary owner is none was
         * specified when this compilation unit handle was created.
         * <p>
         * When switching to working copy mode, problems are reported to given 
         * <code>IProblemRequestor</code>.
         * </p>
         * <p>
         * Once in working copy mode, changes to this compilation unit or its children are done in memory.
         * Only the new buffer is affected. Using <code>commitWorkingCopy(boolean, IProgressMonitor)</code>
         * will bring the underlying resource in sync with this compilation unit.
         * </p>
         * <p>
         * If this compilation unit was already in working copy mode, an internal counter is incremented and no
         * other action is taken on this compilation unit. To bring this compilation unit back into the original mode 
         * (where it reflects the underlying resource), <code>discardWorkingCopy</code> must be call as many 
         * times as <code>becomeWorkingCopy</code>.
         * </p>
         * 
         * @param problemRequestor a requestor which will get notified of problems detected during
         *      reconciling as they are discovered. The requestor can be set to <code>null</code> indicating
         *      that the client is not interested in problems.
         * @param monitor a progress monitor used to report progress while opening this compilation unit
         *      or <code>null</code> if no progress should be reported 
         * @throws JavaModelException if this compilation unit could not become a working copy.
         * @see #discardWorkingCopy()
         * @since 3.0
         */
        void becomeWorkingCopy(IProblemRequestor problemRequestor, IProgressMonitor monitor) throws JavaModelException;
        /**
         * Commits the contents of this working copy to its underlying resource.
         *
         * <p>It is possible that the contents of the original resource have changed
         * since this working copy was created, in which case there is an update conflict.
         * The value of the <code>force</code> parameter effects the resolution of
         * such a conflict:<ul>
         * <li> <code>true</code> - in this case the contents of this working copy are applied to
         *      the underlying resource even though this working copy was created before
         *              a subsequent change in the resource</li>
         * <li> <code>false</code> - in this case a <code>JavaModelException</code> is thrown</li>
         * </ul>
         * <p>
         * Since 2.1, a working copy can be created on a not-yet existing compilation
         * unit. In particular, such a working copy can then be committed in order to create
         * the corresponding compilation unit.
         * </p>
         * @param force a flag to handle the cases when the contents of the original resource have changed
         * since this working copy was created
         * @param monitor the given progress monitor
         * @throws JavaModelException if this working copy could not commit. Reasons include:
         * <ul>
         * <li> A <code>CoreException</code> occurred while updating an underlying resource
         * <li> This element is not a working copy (INVALID_ELEMENT_TYPES)
         * <li> A update conflict (described above) (UPDATE_CONFLICT)
         * </ul>
         * @since 3.0
         */
        void commitWorkingCopy(boolean force, IProgressMonitor monitor) throws JavaModelException;
        /**
         * Changes this compilation unit in working copy mode back to its original mode.
         * <p>
         * This has no effect if this compilation unit was not in working copy mode.
         * </p>
         * <p>
         * If <code>becomeWorkingCopy</code> was called several times on this
         * compilation unit, <code>discardWorkingCopy</code> must be called as 
         * many times before it switches back to the original mode.
         * </p>
         * 
         * @throws JavaModelException if this working copy could not return in its original mode.
         * @see #becomeWorkingCopy(IProblemRequestor, IProgressMonitor)
         * @since 3.0
         */
        void discardWorkingCopy() throws JavaModelException;
/**
 * Creates and returns an import declaration in this compilation unit
 * with the given name.
 * <p>
 * Optionally, the new element can be positioned before the specified
 * sibling. If no sibling is specified, the element will be inserted
 * as the last import declaration in this compilation unit.
 * <p>
 * If the compilation unit already includes the specified import declaration,
 * the import is not generated (it does not generate duplicates).
 * Note that it is valid to specify both a single-type import and an on-demand import
 * for the same package, for example <code>"java.io.File"</code> and
 * <code>"java.io.*"</code>, in which case both are preserved since the semantics
 * of this are not the same as just importing <code>"java.io.*"</code>.
 * Importing <code>"java.lang.*"</code>, or the package in which the compilation unit
 * is defined, are not treated as special cases.  If they are specified, they are
 * included in the result.
 *
 * @param name the name of the import declaration to add as defined by JLS2 7.5. (For example: <code>"java.io.File"</code> or
 *  <code>"java.awt.*"</code>)
 * @param sibling the existing element which the import declaration will be inserted immediately before (if
 *      <code> null </code>, then this import will be inserted as the last import declaration.
 * @param monitor the progress monitor to notify
 * @return the newly inserted import declaration (or the previously existing one in case attempting to create a duplicate)
 *
 * @exception JavaModelException if the element could not be created. Reasons include:
 * <ul>
 * <li> This Java element does not exist or the specified sibling does not exist (ELEMENT_DOES_NOT_EXIST)</li>
 * <li> A <code>CoreException</code> occurred while updating an underlying resource
 * <li> The specified sibling is not a child of this compilation unit (INVALID_SIBLING)
 * <li> The name is not a valid import name (INVALID_NAME)
 * </ul>
 */
//IImportDeclaration createImport(String name, IJavaElement sibling, IProgressMonitor monitor) throws JavaModelException;
/**
 * Creates and returns a package declaration in this compilation unit
 * with the given package name.
 *
 * <p>If the compilation unit already includes the specified package declaration,
 * it is not generated (it does not generate duplicates).
 *
 * @param name the name of the package declaration to add as defined by JLS2 7.4. (For example, <code>"java.lang"</code>)
 * @param monitor the progress monitor to notify
 * @return the newly inserted package declaration (or the previously existing one in case attempting to create a duplicate)
 *
 * @exception JavaModelException if the element could not be created. Reasons include:
 * <ul>
 * <li>This Java element does not exist (ELEMENT_DOES_NOT_EXIST)</li>
 * <li> A <code>CoreException</code> occurred while updating an underlying resource
 * <li> The name is not a valid package name (INVALID_NAME)
 * </ul>
 */
// IPackageDeclaration createPackageDeclaration(String name, IProgressMonitor monitor) throws JavaModelException;   
/**
 * Creates and returns a type in this compilation unit with the
 * given contents. If this compilation unit does not exist, one
 * will be created with an appropriate package declaration.
 * <p>
 * Optionally, the new type can be positioned before the specified
 * sibling. If <code>sibling</code> is <code>null</code>, the type will be appended
 * to the end of this compilation unit.
 *
 * <p>It is possible that a type with the same name already exists in this compilation unit.
 * The value of the <code>force</code> parameter effects the resolution of
 * such a conflict:<ul>
 * <li> <code>true</code> - in this case the type is created with the new contents</li>
 * <li> <code>false</code> - in this case a <code>JavaModelException</code> is thrown</li>
 * </ul>
 *
 * @param contents the source contents of the type declaration to add.
 * @param sibling the existing element which the type will be inserted immediately before (if
 *      <code> null </code>, then this type will be inserted as the last type declaration.
 * @param force a <code> boolean </code> flag indicating how to deal with duplicates
 * @param monitor the progress monitor to notify
 * @return the newly inserted type
 *
 * @exception JavaModelException if the element could not be created. Reasons include:
 * <ul>
 * <li>The specified sibling element does not exist (ELEMENT_DOES_NOT_EXIST)</li>
 * <li> A <code>CoreException</code> occurred while updating an underlying resource
 * <li> The specified sibling is not a child of this compilation unit (INVALID_SIBLING)
 * <li> The contents could not be recognized as a type declaration (INVALID_CONTENTS)
 * <li> There was a naming collision with an existing type (NAME_COLLISION)
 * </ul>
 */
//IType createType(String contents, IJavaElement sibling, boolean force, IProgressMonitor monitor) throws JavaModelException;
/**
 * Returns all types declared in this compilation unit in the order
 * in which they appear in the source. 
 * This includes all top-level types and nested member types.
 * It does NOT include local types (types defined in methods).
 *
 * @return the array of top-level and member types defined in a compilation unit, in declaration order.
 * @exception JavaModelException if this element does not exist or if an
 *              exception occurs while accessing its corresponding resource
 */
IType[] getAllTypes() throws JavaModelException;
/**
 * Returns the smallest element within this compilation unit that 
 * includes the given source position (that is, a method, field, etc.), or
 * <code>null</code> if there is no element other than the compilation
 * unit itself at the given position, or if the given position is not
 * within the source range of this compilation unit.
 *
 * @param position a source position inside the compilation unit
 * @return the innermost Java element enclosing a given source position or <code>null</code>
 *      if none (excluding the compilation unit).
 * @exception JavaModelException if the compilation unit does not exist or if an
 *              exception occurs while accessing its corresponding resource
 */
IJavaElement getElementAt(int position) throws JavaModelException;
/**
 * Returns the first import declaration in this compilation unit with the given name.
 * This is a handle-only method. The import declaration may or may not exist. This
 * is a convenience method - imports can also be accessed from a compilation unit's
 * import container.
 *
 * @param name the name of the import to find as defined by JLS2 7.5. (For example: <code>"java.io.File"</code> 
 *      or <code>"java.awt.*"</code>)
 * @return a handle onto the corresponding import declaration. The import declaration may or may not exist.
 */
//IImportDeclaration getImport(String name) ;
/**
 * Returns the import container for this compilation unit.
 * This is a handle-only method. The import container may or
 * may not exist. The import container can used to access the 
 * imports.
 * @return a handle onto the corresponding import container. The 
 *              import contain may or may not exist.
 */
ImportContainer getImportContainer();
/**
 * Returns the import declarations in this compilation unit
 * in the order in which they appear in the source. This is
 * a convenience method - import declarations can also be
 * accessed from a compilation unit's import container.
 *
 * @exception JavaModelException if this element does not exist or if an
 *              exception occurs while accessing its corresponding resource
 */
//IImportDeclaration[] getImports() throws JavaModelException;
/**
 * Returns the first package declaration in this compilation unit with the given package name
 * (there normally is at most one package declaration).
 * This is a handle-only method. The package declaration may or may not exist.
 *
 * @param name the name of the package declaration as defined by JLS2 7.4. (For example, <code>"java.lang"</code>)
 */
IPackageDeclaration getPackageDeclaration(String name);
/**
 * Returns the package declarations in this compilation unit
 * in the order in which they appear in the source.
 * There normally is at most one package declaration.
 *
 * @return an array of package declaration (normally of size one)
 *
 * @exception JavaModelException if this element does not exist or if an
 *              exception occurs while accessing its corresponding resource
 */
//IPackageDeclaration[] getPackageDeclarations() throws JavaModelException;
/**
 * Returns the primary compilation unit (whose owner is the primary owner)
 * this working copy was created from, or this compilation unit if this a primary
 * compilation unit.
 * <p>
 * Note that the returned primary compilation unit can be in working copy mode.
 * </p>
 * 
 * @return the primary compilation unit this working copy was created from,
 * or this compilation unit if it is primary
 * @since 3.0
 */
ICompilationUnit getPrimary();
/**
 * Returns the top-level type declared in this compilation unit with the given simple type name.
 * The type name has to be a valid compilation unit name.
 * This is a handle-only method. The type may or may not exist.
 *
 * @param name the simple name of the requested type in the compilation unit
 * @return a handle onto the corresponding type. The type may or may not exist.
 * @see JavaConventions#validateCompilationUnitName(String name)
 */
IType getType(String name);
/**
 * Returns the top-level types declared in this compilation unit
 * in the order in which they appear in the source.
 *
 * @exception JavaModelException if this element does not exist or if an
 *              exception occurs while accessing its corresponding resource
 */
IType[] getTypes() throws JavaModelException;

}