| /* |
| * 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.apache.directory.shared.ldap.filter; |
| |
| |
| import java.util.List; |
| |
| import org.apache.directory.shared.i18n.I18n; |
| |
| /** |
| * Node representing an Not connector in a filter operation |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev: 517453 $ |
| */ |
| public class NotNode extends BranchNode |
| { |
| /** |
| * Creates a NotNode using a logical NOT operator and a list of children. |
| * |
| * A Not node could contain only one child |
| * |
| * @param childList the child nodes under this branch node. |
| */ |
| public NotNode( List<ExprNode> childList ) |
| { |
| super( AssertionType.NOT ); |
| |
| if ( childList != null ) |
| { |
| setChildren( childList ); |
| } |
| } |
| |
| |
| /** |
| * Creates a NotNode using a logical NOT operator and the given child. |
| * |
| * @param child the child node under this branch node. |
| */ |
| public NotNode( ExprNode child ) |
| { |
| super( AssertionType.NOT ); |
| |
| if ( child != null ) |
| { |
| addNode( child ); |
| } |
| } |
| |
| |
| /** |
| * Clone the Node |
| */ |
| @Override public ExprNode clone() |
| { |
| return super.clone(); |
| } |
| |
| |
| |
| /** |
| * Creates an empty NotNode |
| */ |
| public NotNode() |
| { |
| this( (ExprNode)null ); |
| } |
| |
| /** |
| * Adds a child node to this NOT node node |
| * |
| * @param node the child expression to add to this NOT node |
| */ |
| public void addNode( ExprNode node ) |
| { |
| if ( ( children != null ) && ( children.size() >= 1 ) ) |
| { |
| throw new IllegalStateException( I18n.err( I18n.ERR_04159 ) ); |
| } |
| |
| children.add( node ); |
| } |
| |
| |
| /** |
| * Adds a child node to this NOT node at the head rather than the tail. |
| * |
| * @param node the child expression to add to this branch node |
| */ |
| public void addNodeToHead( ExprNode node ) |
| { |
| if ( children.size() >= 1 ) |
| { |
| throw new IllegalStateException( I18n.err( I18n.ERR_04159 ) ); |
| } |
| |
| children.add( node ); |
| } |
| |
| |
| /** |
| * Sets the list of children under this node. |
| * |
| * @param childList the list of children to set. |
| */ |
| public void setChildren( List<ExprNode> childList ) |
| { |
| if ( ( childList != null ) && ( childList.size() > 1 ) ) |
| { |
| throw new IllegalStateException( I18n.err( I18n.ERR_04159 ) ); |
| } |
| |
| children = childList; |
| } |
| |
| |
| /** |
| * Gets the operator for this branch node. |
| * |
| * @return the operator constant. |
| */ |
| public AssertionType getOperator() |
| { |
| return AssertionType.NOT; |
| } |
| |
| |
| /** |
| * Tests whether or not this node is a disjunction (a OR'ed branch). |
| * |
| * @return true if the operation is a OR, false otherwise. |
| */ |
| public boolean isDisjunction() |
| { |
| return false; |
| } |
| |
| |
| /** |
| * Tests whether or not this node is a conjunction (a AND'ed branch). |
| * |
| * @return true if the operation is a AND, false otherwise. |
| */ |
| public boolean isConjunction() |
| { |
| return false; |
| } |
| |
| |
| /** |
| * Tests whether or not this node is a negation (a NOT'ed branch). |
| * |
| * @return true if the operation is a NOT, false otherwise. |
| */ |
| public boolean isNegation() |
| { |
| return true; |
| } |
| |
| |
| /** |
| * @see ExprNode#printRefinementToBuffer(StringBuffer) |
| * |
| * @return The buffer in which the refinement has been appended |
| * @throws UnsupportedOperationException if this node isn't a part of a refinement. |
| */ |
| public StringBuilder printRefinementToBuffer( StringBuilder buf ) |
| { |
| buf.append( "not: {" ); |
| boolean isFirst = true; |
| |
| for ( ExprNode node:children ) |
| { |
| if ( isFirst ) |
| { |
| isFirst = false; |
| } |
| else |
| { |
| buf.append( ", " ); |
| } |
| |
| node.printRefinementToBuffer( buf ); |
| } |
| |
| buf.append( '}' ); |
| |
| return buf; |
| } |
| |
| /** |
| * Gets the recursive prefix string represent of the filter from this node |
| * down. |
| * |
| * @see java.lang.Object#toString() |
| * @return A string representing the AndNode |
| */ |
| public String toString() |
| { |
| StringBuilder buf = new StringBuilder(); |
| buf.append( "(!" ); |
| |
| buf.append( super.toString() ); |
| |
| buf.append( getFirstChild() ); |
| buf.append( ')' ); |
| |
| return buf.toString(); |
| } |
| } |