| /* |
| * 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 |
| * |
| * https://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.api.ldap.model.filter; |
| |
| |
| import org.apache.directory.api.i18n.I18n; |
| import org.apache.directory.api.ldap.model.schema.AttributeType; |
| import org.apache.directory.api.util.Strings; |
| |
| |
| /** |
| * Abstract base class for leaf nodes within the expression filter tree. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public abstract class LeafNode extends AbstractExprNode |
| { |
| /** attributeType on which this leaf is based */ |
| protected AttributeType attributeType; |
| |
| /** attribute on which this leaf is based */ |
| protected String attribute; |
| |
| |
| /** |
| * Creates a leaf node. |
| * |
| * @param attributeType the attribute this node is based on |
| * @param assertionType the type of this leaf node |
| */ |
| protected LeafNode( AttributeType attributeType, AssertionType assertionType ) |
| { |
| super( assertionType ); |
| this.attributeType = attributeType; |
| |
| if ( attributeType != null ) |
| { |
| this.attribute = attributeType.getName(); |
| } |
| else |
| { |
| throw new NullPointerException( I18n.err( I18n.ERR_13302_CANNOT_CREATE_NODE_NULL_ATTR ) ); |
| } |
| } |
| |
| |
| /** |
| * 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.attributeType = null; |
| this.attribute = attribute; |
| } |
| |
| |
| /** |
| * Gets whether this node is a leaf - the answer is always true here. |
| * |
| * @return true always |
| */ |
| @Override |
| public final boolean isLeaf() |
| { |
| return true; |
| } |
| |
| |
| /** |
| * Gets the attributeType this leaf node is based on. |
| * |
| * @return the attributeType asserted |
| */ |
| public final AttributeType getAttributeType() |
| { |
| return attributeType; |
| } |
| |
| |
| /** |
| * Gets the attribute this leaf node is based on. |
| * |
| * @return the attribute asserted |
| */ |
| public final String getAttribute() |
| { |
| return attribute; |
| } |
| |
| |
| /** |
| * Sets the attributeType this leaf node is based on. |
| * |
| * @param attributeType the attributeType that is asserted by this filter node |
| */ |
| public void setAttributeType( AttributeType attributeType ) |
| { |
| this.attributeType = attributeType; |
| |
| if ( attributeType != null ) |
| { |
| attribute = attributeType.getName(); |
| } |
| } |
| |
| |
| /** |
| * 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 ExprNode#accept( |
| *FilterVisitor) |
| * |
| * @param visitor the filter expression tree structure visitor |
| * @return The modified element |
| */ |
| @Override |
| public final Object accept( FilterVisitor visitor ) |
| { |
| if ( visitor.canVisit( this ) ) |
| { |
| return visitor.visit( this ); |
| } |
| else |
| { |
| return null; |
| } |
| } |
| |
| |
| /** |
| * Tells if this Node is Schema aware. |
| * |
| * @return true if the Node is SchemaAware |
| */ |
| @Override |
| public boolean isSchemaAware() |
| { |
| return attributeType != null; |
| } |
| |
| |
| /** |
| * Escape a binary value into a String form that is accepted as a Filter |
| * |
| * @param bytes The data to escape |
| * @return The escaped String |
| */ |
| private static String escapeBytes( byte[] bytes ) |
| { |
| // We have to escape all the bytes |
| char[] chars = new char[bytes.length * 3]; |
| int pos = 0; |
| |
| for ( byte bb : bytes ) |
| { |
| chars[pos++] = '\\'; |
| chars[pos++] = Strings.dumpHex( ( byte ) ( bb >> 4 ) ); |
| chars[pos++] = Strings.dumpHex( ( byte ) ( bb & 0x0F ) ); |
| } |
| |
| return new String( chars, 0, pos ); |
| } |
| |
| |
| /** |
| * Escape a String value into a String form that is accepted as a Filter |
| * |
| * @param bytes The data to escape |
| * @return The escaped String |
| */ |
| private static String escapeString( byte[] bytes ) |
| { |
| StringBuilder sb = new StringBuilder( bytes.length ); |
| |
| for ( byte b : bytes ) |
| { |
| switch ( b ) |
| { |
| case 0x20 : case 0x21 : case 0x22 : case 0x23 : case 0x24 : case 0x25 : case 0x26 : case 0x27 : |
| sb.append( ( char ) b ); |
| break; |
| |
| case 0x28 : |
| // '(' |
| sb.append( "\\28" ); |
| break; |
| |
| case 0x29 : |
| sb.append( "\\29" ); |
| // ')' |
| break; |
| |
| case 0x2A : |
| // '*' |
| sb.append( "\\2A" ); |
| break; |
| |
| case 0x2B : case 0x2C : case 0x2D : case 0x2E : case 0x2F : |
| case 0x30 : case 0x31 : case 0x32 : case 0x33 : case 0x34 : case 0x35 : case 0x36 : case 0x37 : |
| case 0x38 : case 0x39 : case 0x3A : case 0x3B : case 0x3C : case 0x3D : case 0x3E : case 0x3F : |
| case 0x40 : case 0x41 : case 0x42 : case 0x43 : case 0x44 : case 0x45 : case 0x46 : case 0x47 : |
| case 0x48 : case 0x49 : case 0x4A : case 0x4B : case 0x4C : case 0x4D : case 0x4E : case 0x4F : |
| case 0x50 : case 0x51 : case 0x52 : case 0x53 : case 0x54 : case 0x55 : case 0x56 : case 0x57 : |
| case 0x58 : case 0x59 : case 0x5A : case 0x5B : |
| sb.append( ( char ) b ); |
| break; |
| |
| case 0x5C : |
| // '\' |
| sb.append( "\\5C" ); |
| break; |
| |
| case 0x5D : case 0x5E : case 0x5F : |
| case 0x60 : case 0x61 : case 0x62 : case 0x63 : case 0x64 : case 0x65 : case 0x66 : case 0x67 : |
| case 0x68 : case 0x69 : case 0x6A : case 0x6B : case 0x6C : case 0x6D : case 0x6E : case 0x6F : |
| case 0x70 : case 0x71 : case 0x72 : case 0x73 : case 0x74 : case 0x75 : case 0x76 : case 0x77 : |
| case 0x78 : case 0x79 : case 0x7A : case 0x7B : case 0x7C : case 0x7D : case 0x7E : case 0x7F : |
| sb.append( ( char ) b ); |
| break; |
| |
| default : |
| // This is a binary value |
| return null; |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| |
| /** |
| * Handles the escaping of special characters in LDAP search filter assertion values using the |
| * <valueencoding> rule as described in |
| * <a href="http://www.ietf.org/rfc/rfc4515.txt">RFC 4515</a>. Needed so that |
| * {@link ExprNode#printRefinementToBuffer(StringBuilder)} results in a valid filter string that can be parsed |
| * again (as a way of cloning filters). |
| * |
| * @param attributeType The associated {@link AttributeType} |
| * @param value Right hand side of "attrId=value" assertion occurring in an LDAP search filter. |
| * @return Escaped version of <code>value</code> |
| */ |
| protected static String escapeFilterValue( AttributeType attributeType, byte[] value ) |
| { |
| if ( value == null ) |
| { |
| return null; |
| } |
| |
| if ( attributeType != null ) |
| { |
| if ( attributeType.isHR() ) |
| { |
| String result = escapeString( value ); |
| |
| if ( result == null ) |
| { |
| return escapeBytes( value ); |
| } |
| else |
| { |
| return result; |
| } |
| } |
| else |
| { |
| return escapeBytes( value ); |
| } |
| } |
| else |
| { |
| String result = escapeString( value ); |
| |
| if ( result == null ) |
| { |
| return escapeBytes( value ); |
| } |
| else |
| { |
| return result; |
| } |
| } |
| } |
| |
| |
| /** |
| * Handles the escaping of special characters in LDAP search filter assertion values using the |
| * <valueencoding> rule as described in |
| * <a href="http://www.ietf.org/rfc/rfc4515.txt">RFC 4515</a>. Needed so that |
| * {@link ExprNode#printRefinementToBuffer(StringBuilder)} results in a valid filter string that can be parsed |
| * again (as a way of cloning filters). |
| * |
| * @param value Right hand side of "attrId=value" assertion occurring in an LDAP search filter. |
| * @return Escaped version of <code>value</code> |
| */ |
| protected static String escapeFilterValue( String value ) |
| { |
| if ( value == null ) |
| { |
| return null; |
| } |
| |
| StringBuilder sb = new StringBuilder( value.length() ); |
| |
| for ( int i = 0; i < value.length(); i++ ) |
| { |
| char c = value.charAt( i ); |
| |
| switch ( c ) |
| { |
| case 0x00: |
| sb.append( "\\00" ); |
| break; |
| |
| case '(' : |
| sb.append( "\\28" ); |
| break; |
| |
| case ')' : |
| sb.append( "\\29" ); |
| break; |
| |
| case '*' : |
| sb.append( "\\2A" ); |
| break; |
| |
| case '\\' : |
| sb.append( "\\5C" ); |
| break; |
| |
| default : |
| sb.append( c ); |
| break; |
| |
| } |
| } |
| |
| return sb.toString(); |
| } |
| |
| |
| |
| /** |
| * @see Object#hashCode() |
| * @return the instance's hash code |
| */ |
| @Override |
| public int hashCode() |
| { |
| int h = 37; |
| |
| h = h * 17 + super.hashCode(); |
| |
| if ( attributeType != null ) |
| { |
| h = h * 17 + attributeType.hashCode(); |
| } |
| else |
| { |
| h = h * 17 + attribute.hashCode(); |
| } |
| |
| return h; |
| } |
| |
| |
| /** |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals( Object other ) |
| { |
| if ( this == other ) |
| { |
| return true; |
| } |
| |
| if ( !( other instanceof LeafNode ) ) |
| { |
| return false; |
| } |
| |
| LeafNode otherNode = ( LeafNode ) other; |
| |
| if ( other.getClass() != this.getClass() ) |
| { |
| return false; |
| } |
| |
| if ( attributeType != null ) |
| { |
| return attributeType.equals( otherNode.getAttributeType() ); |
| } |
| else |
| { |
| return attribute.equalsIgnoreCase( otherNode.getAttribute() ); |
| } |
| } |
| } |