java/dbschema/src/org/netbeans/modules/dbschema/DBMemoryCollection.java - netbeans - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 package org.netbeans.modules.dbschema;

 import java.util.*;

 /** Support class that manages set of objects and fires events
  */
 class DBMemoryCollection {
 	/** Object to fire info about changes to */
 	protected DBElement.Memory/*TableElement.Memory*/ _memory;

 	/** name of property to fire */
 	private String _propertyName;

 	/** array template to return */
 	private Object[] _template;

     private DBElement[] _elms;

     /** Default constructor
      */
 	public DBMemoryCollection() {
     }

 	/** Creates a new collection.
 	 * @param memory memory element to fire changes
 	 * @param propertyName name of property to fire when array changes
 	 * @param emptyArray emptyArray instance that provides the type of arrays that should be returned by toArray method
 	 */
 	public DBMemoryCollection (DBElement.Memory memory, String propertyName, Object[] emptyArray) {
 		_memory = memory;
 		_propertyName = propertyName;
 		_template = emptyArray;
 	}

 	/** Changes the content of this object.
 	 * @param arr array of objects to change
 	 * @param action the action to do
 	 */
 	public void change(DBElement[] arr, int action) {
 		change(Arrays.asList(arr), action);
 	}

 	/** Changes the content of this object.
 	 * @param c collection of objects to change
 	 * @param action the action to do
 	 */
 	protected void change(List c, int action) {
 		boolean hasChange = false;

         try {
             DBElement[] oldElements = getElements();
             int oldLength = (oldElements == null) ? 0 : oldElements.length;
             int newLength = (c == null) ? 0 : c.size();
             List<DBElement> list = null;

             switch (action) {
                 case DBElement.Impl.ADD:
                     if (newLength > 0) {
                         list = ((oldLength == 0) ? new ArrayList() : new ArrayList(Arrays.asList(oldElements)));
                         list.addAll(c);
                         hasChange = true;
                     }
                     break;
                 case TableElement.Impl.SET:
                     list = c;
                     hasChange = true;
                     break;
                 case TableElement.Impl.REMOVE:
                     if (newLength > 0 && oldLength > 0) {
                         list = new ArrayList<>(Arrays.asList(oldElements));
                         list.removeAll(c);
                         hasChange = true;
                     }
                     break;
             }
             if (hasChange)
                 _elms = (DBElement[]) list.toArray(_template);
         } finally {
             if (hasChange)
                 _memory.firePropertyChange(_propertyName, null, null);
         }
 	}

     /** Returns an array containing all of the elements in this collection.
      * @return an array containing all of the elements in this collection
      */
     public DBElement[] getElements() {
         if (_elms != null)
             return _elms;
         else
             return Arrays.asList(_template).toArray(new DBElement[_template.length]);
     }

     /** Returns an element specified by the name from this collection.
      * @return an element
      */
     public DBElement getElement(DBIdentifier name) {
         DBElement[] elms = getElements();
         int count = ((elms != null) ? elms.length : 0);

         for (int i = 0; i < count; i++) {
             DBElement elm = elms[i];
             if (name.getName().equals(elm.getName().getName()))
                 return elm;
         }

         return null;
     }

 	/** Collection for members. Assignes to each class its members.
 	 */
 	static abstract class Member extends DBMemoryCollection {
         /** Default constructor.
          */
         public Member() {
         }

         /** Creates a new member.
          * @param memory memory element to fire changes to
          * @param propertyName name of property to fire when array changes
          * @param emptyArray emptyArray instance that provides the type of
          * arrays that should be returned by toArray method
          */
         public Member (DBElement.Memory memory, String propertyName, Object[] emptyArray) {
             super(memory, propertyName, emptyArray);
         }

         /** Gets a table element.
          * @return a table element
          */
 		protected TableElement getTableElement() {
 			if (_memory instanceof TableElement.Memory)
 				return ((TableElement.Memory)_memory).getTableElement();

 			if (_memory instanceof DBMemberElement.Memory)
 				return ((DBMemberElement)((DBMemberElement.Memory)_memory)._element).getDeclaringTable();

 			return null;
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected abstract DBMemberElement clone(Object obj);
 	}

 	/** Collection of tables.
 	 */
 	static class Table extends DBMemoryCollection {
 		private static final TableElement[] EMPTY = new TableElement[0];

         /** Default constructor
          */
         public Table() {
         }

 		/** Creates a new table.
          * @param el table element memory impl to work in
 		 */
 		public Table(DBElement.Memory el) {
 			super(el, DBElementProperties.PROP_TABLES, EMPTY);
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected TableElement clone (Object obj) {
             return new TableElement(new TableElement.Memory((TableElement) obj), getSchemaElement());
 		}

         /** Gets a schema element.
          * @return a schema element
          */
 		protected SchemaElement getSchemaElement () {
 			if (_memory instanceof SchemaElement.Memory)
 				return ((SchemaElement.Memory)_memory).getSchemaElement();

 			if (_memory instanceof TableElement.Memory)
 				return ((TableElement)((TableElement.Memory)_memory)._element).getDeclaringSchema();

 			return null;
 		}
 	}

 	/** Collection of columns.
 	 */
 	static class Column extends Member {
 		private static final ColumnElement[] EMPTY = new ColumnElement[0];

         /** Default constructor
          */
         public Column() {
         }

 		/** Creates a new column.
          * @param el table element memory impl to work in
 		 */
 		public Column(DBElement.Memory el) {
 			super(el, DBElementProperties.PROP_COLUMNS, EMPTY);
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected DBMemberElement clone(Object obj) {
 			return new ColumnElement(new ColumnElement.Memory((ColumnElement)obj), getTableElement());
 		}
 	}

 	/** Collection of column pairs.
 	 */
 	static class ColumnPair extends Member {
 		private static final ColumnPairElement[] EMPTY = new ColumnPairElement[0];

         /** Default constructor
          */
         public ColumnPair() {
         }

 		/** Creates a new column pair.
          * @param el table element memory impl to work in
 		 */
 		public ColumnPair(DBElement.Memory el) {
 			super(el, DBElementProperties.PROP_COLUMN_PAIRS, EMPTY);
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected DBMemberElement clone(Object obj) {
 //			return new ColumnPairElement(new ColumnPairElement.Memory((ColumnPairElement)obj), null, null, getTableElement());
             return null;
 		}
 	}

 	/** Collection of indexes.
 	 */
 	static class Index extends Member {
 		private static final IndexElement[] EMPTY = new IndexElement[0];

         /** Default constructor
          */
         public Index() {
         }

 		/** Creates a new index.
          * @param el table element memory impl to work in
 		 */
 		public Index(DBElement.Memory el) {
 			super(el, DBElementProperties.PROP_INDEXES, EMPTY);
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected DBMemberElement clone(Object obj) {
 			return new IndexElement(new IndexElement.Memory((IndexElement)obj), getTableElement());
 		}
 	}

 	/** Collection of keys.
 	 */
 	static class Key extends Member {
 		private static final KeyElement[] EMPTY = new KeyElement[0];

         /** Default constructor
          */
         public Key() {
         }

 		/** Creates a new key.
          * @param el table element memory impl to work in
 		 */
 		public Key(DBElement.Memory el) {
 			super(el, DBElementProperties.PROP_KEYS, EMPTY);
 		}

 		/** Clones the object.
 		 * @param obj object to clone
 		 * @return cloned object
 		 */
 		protected DBMemberElement clone(Object obj) {
 		    return null;
         }
 	}
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	package org.netbeans.modules.dbschema;

	import java.util.*;

	/** Support class that manages set of objects and fires events
	*/
	class DBMemoryCollection {
	/** Object to fire info about changes to */
	protected DBElement.Memory/TableElement.Memory/ _memory;

	/** name of property to fire */
	private String _propertyName;

	/** array template to return */
	private Object[] _template;

	private DBElement[] _elms;

	/** Default constructor
	*/
	public DBMemoryCollection() {
	}

	/** Creates a new collection.
	* @param memory memory element to fire changes
	* @param propertyName name of property to fire when array changes
	* @param emptyArray emptyArray instance that provides the type of arrays that should be returned by toArray method
	*/
	public DBMemoryCollection (DBElement.Memory memory, String propertyName, Object[] emptyArray) {
	_memory = memory;
	_propertyName = propertyName;
	_template = emptyArray;
	}

	/** Changes the content of this object.
	* @param arr array of objects to change
	* @param action the action to do
	*/
	public void change(DBElement[] arr, int action) {
	change(Arrays.asList(arr), action);
	}

	/** Changes the content of this object.
	* @param c collection of objects to change
	* @param action the action to do
	*/
	protected void change(List c, int action) {
	boolean hasChange = false;

	try {
	DBElement[] oldElements = getElements();
	int oldLength = (oldElements == null) ? 0 : oldElements.length;
	int newLength = (c == null) ? 0 : c.size();
	List<DBElement> list = null;

	switch (action) {
	case DBElement.Impl.ADD:
	if (newLength > 0) {
	list = ((oldLength == 0) ? new ArrayList() : new ArrayList(Arrays.asList(oldElements)));
	list.addAll(c);
	hasChange = true;
	}
	break;
	case TableElement.Impl.SET:
	list = c;
	hasChange = true;
	break;
	case TableElement.Impl.REMOVE:
	if (newLength > 0 && oldLength > 0) {
	list = new ArrayList<>(Arrays.asList(oldElements));
	list.removeAll(c);
	hasChange = true;
	}
	break;
	}
	if (hasChange)
	_elms = (DBElement[]) list.toArray(_template);
	} finally {
	if (hasChange)
	_memory.firePropertyChange(_propertyName, null, null);
	}
	}

	/** Returns an array containing all of the elements in this collection.
	* @return an array containing all of the elements in this collection
	*/
	public DBElement[] getElements() {
	if (_elms != null)
	return _elms;
	else
	return Arrays.asList(_template).toArray(new DBElement[_template.length]);
	}

	/** Returns an element specified by the name from this collection.
	* @return an element
	*/
	public DBElement getElement(DBIdentifier name) {
	DBElement[] elms = getElements();
	int count = ((elms != null) ? elms.length : 0);

	for (int i = 0; i < count; i++) {
	DBElement elm = elms[i];
	if (name.getName().equals(elm.getName().getName()))
	return elm;
	}

	return null;
	}

	/** Collection for members. Assignes to each class its members.
	*/
	static abstract class Member extends DBMemoryCollection {
	/** Default constructor.
	*/
	public Member() {
	}

	/** Creates a new member.
	* @param memory memory element to fire changes to
	* @param propertyName name of property to fire when array changes
	* @param emptyArray emptyArray instance that provides the type of
	* arrays that should be returned by toArray method
	*/
	public Member (DBElement.Memory memory, String propertyName, Object[] emptyArray) {
	super(memory, propertyName, emptyArray);
	}

	/** Gets a table element.
	* @return a table element
	*/
	protected TableElement getTableElement() {
	if (_memory instanceof TableElement.Memory)
	return ((TableElement.Memory)_memory).getTableElement();

	if (_memory instanceof DBMemberElement.Memory)
	return ((DBMemberElement)((DBMemberElement.Memory)_memory)._element).getDeclaringTable();

	return null;
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected abstract DBMemberElement clone(Object obj);
	}

	/** Collection of tables.
	*/
	static class Table extends DBMemoryCollection {
	private static final TableElement[] EMPTY = new TableElement[0];

	/** Default constructor
	*/
	public Table() {
	}

	/** Creates a new table.
	* @param el table element memory impl to work in
	*/
	public Table(DBElement.Memory el) {
	super(el, DBElementProperties.PROP_TABLES, EMPTY);
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected TableElement clone (Object obj) {
	return new TableElement(new TableElement.Memory((TableElement) obj), getSchemaElement());
	}

	/** Gets a schema element.
	* @return a schema element
	*/
	protected SchemaElement getSchemaElement () {
	if (_memory instanceof SchemaElement.Memory)
	return ((SchemaElement.Memory)_memory).getSchemaElement();

	if (_memory instanceof TableElement.Memory)
	return ((TableElement)((TableElement.Memory)_memory)._element).getDeclaringSchema();

	return null;
	}
	}

	/** Collection of columns.
	*/
	static class Column extends Member {
	private static final ColumnElement[] EMPTY = new ColumnElement[0];

	/** Default constructor
	*/
	public Column() {
	}

	/** Creates a new column.
	* @param el table element memory impl to work in
	*/
	public Column(DBElement.Memory el) {
	super(el, DBElementProperties.PROP_COLUMNS, EMPTY);
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected DBMemberElement clone(Object obj) {
	return new ColumnElement(new ColumnElement.Memory((ColumnElement)obj), getTableElement());
	}
	}

	/** Collection of column pairs.
	*/
	static class ColumnPair extends Member {
	private static final ColumnPairElement[] EMPTY = new ColumnPairElement[0];

	/** Default constructor
	*/
	public ColumnPair() {
	}

	/** Creates a new column pair.
	* @param el table element memory impl to work in
	*/
	public ColumnPair(DBElement.Memory el) {
	super(el, DBElementProperties.PROP_COLUMN_PAIRS, EMPTY);
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected DBMemberElement clone(Object obj) {
	// return new ColumnPairElement(new ColumnPairElement.Memory((ColumnPairElement)obj), null, null, getTableElement());
	return null;
	}
	}

	/** Collection of indexes.
	*/
	static class Index extends Member {
	private static final IndexElement[] EMPTY = new IndexElement[0];

	/** Default constructor
	*/
	public Index() {
	}

	/** Creates a new index.
	* @param el table element memory impl to work in
	*/
	public Index(DBElement.Memory el) {
	super(el, DBElementProperties.PROP_INDEXES, EMPTY);
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected DBMemberElement clone(Object obj) {
	return new IndexElement(new IndexElement.Memory((IndexElement)obj), getTableElement());
	}
	}

	/** Collection of keys.
	*/
	static class Key extends Member {
	private static final KeyElement[] EMPTY = new KeyElement[0];

	/** Default constructor
	*/
	public Key() {
	}

	/** Creates a new key.
	* @param el table element memory impl to work in
	*/
	public Key(DBElement.Memory el) {
	super(el, DBElementProperties.PROP_KEYS, EMPTY);
	}

	/** Clones the object.
	* @param obj object to clone
	* @return cloned object
	*/
	protected DBMemberElement clone(Object obj) {
	return null;
	}
	}
	}