| /* |
| * 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; |
| |
| |
| /** |
| * Abstract base class for leaf nodes within the expression filter tree. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$ |
| */ |
| public class LeafNode extends AbstractExprNode |
| { |
| /** attribute on which this leaf is based */ |
| private String attribute; |
| |
| |
| /** |
| * Creates a leaf node. |
| * |
| * @param attribute the attribute this node is based on |
| * @param assertionType the type of this leaf node |
| */ |
| protected LeafNode( String attribute, AssertionType assertionType ) |
| { |
| super( assertionType ); |
| this.attribute = attribute; |
| } |
| |
| /** |
| * Makes a full clone in new memory space of the current node and children |
| * |
| * @return the clone |
| */ |
| @Override public ExprNode clone() |
| { |
| return super.clone(); |
| } |
| |
| |
| /** |
| * Gets whether this node is a leaf - the answer is always true here. |
| * |
| * @return true always |
| */ |
| public final boolean isLeaf() |
| { |
| return true; |
| } |
| |
| |
| /** |
| * Gets the attribute this leaf node is based on. |
| * |
| * @return the attribute asserted |
| */ |
| public final String getAttribute() |
| { |
| return attribute; |
| } |
| |
| |
| /** |
| * Sets the attribute this leaf node is based on. |
| * |
| * @param attribute the attribute that is asserted by this filter node |
| */ |
| public void setAttribute( String attribute ) |
| { |
| this.attribute = attribute; |
| } |
| |
| |
| /** |
| * @see org.apache.directory.shared.ldap.filter.ExprNode#accept( |
| * org.apache.directory.shared.ldap.filter.FilterVisitor) |
| * |
| * @param visitor the filter expression tree structure visitor |
| * @return The modified element |
| */ |
| public final Object accept( FilterVisitor visitor ) |
| { |
| if ( visitor.canVisit( this ) ) |
| { |
| return visitor.visit( this ); |
| } |
| else |
| { |
| return null; |
| } |
| } |
| |
| |
| /** |
| * @see Object#hashCode() |
| * @return the instance's hash code |
| */ |
| public int hashCode() |
| { |
| int h = 37; |
| |
| h = h*17 + super.hashCode(); |
| h = h*17 + attribute.hashCode(); |
| |
| return h; |
| } |
| |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| public boolean equals( Object other ) |
| { |
| if ( this == other ) |
| { |
| return true; |
| } |
| |
| if ( !( other instanceof LeafNode ) ) |
| { |
| return false; |
| } |
| |
| //noinspection SimplifiableIfStatement |
| if ( other.getClass() != this.getClass() ) |
| { |
| return false; |
| } |
| |
| return attribute.equals( ( ( LeafNode ) other ).getAttribute() ); |
| } |
| } |