| /* |
| * 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.HashMap; |
| import java.util.Map; |
| |
| import org.apache.directory.shared.ldap.entry.Value; |
| import org.apache.directory.shared.ldap.entry.client.ClientBinaryValue; |
| import org.apache.directory.shared.ldap.entry.client.ClientStringValue; |
| |
| |
| /** |
| * Abstract implementation of a expression node. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$ |
| */ |
| public abstract class AbstractExprNode implements ExprNode |
| { |
| /** The map of annotations */ |
| protected Map<String, Object> annotations; |
| |
| /** The node type */ |
| protected final AssertionType assertionType; |
| |
| |
| /** |
| * Creates a node by setting abstract node type. |
| * |
| * @param assertionType The node's type |
| */ |
| protected AbstractExprNode( AssertionType assertionType ) |
| { |
| this.assertionType = assertionType; |
| } |
| |
| |
| /** |
| * @see ExprNode#getAssertionType() |
| * |
| * @return the node's type |
| */ |
| public AssertionType getAssertionType() |
| { |
| return assertionType; |
| } |
| |
| |
| /** |
| * Tests to see if this node is a leaf or branch node. |
| * |
| * @return true if the node is a leaf,false otherwise |
| */ |
| public abstract boolean isLeaf(); |
| |
| |
| /** |
| * @see Object#equals(Object) |
| *@return <code>true</code> if both objects are equal |
| */ |
| public boolean equals( Object o ) |
| { |
| // Shortcut for equals object |
| if ( this == o ) |
| { |
| return true; |
| } |
| |
| if ( !( o instanceof AbstractExprNode ) ) |
| { |
| return false; |
| } |
| |
| AbstractExprNode that = (AbstractExprNode)o; |
| |
| // Check the node type |
| if ( this.assertionType != that.assertionType ) |
| { |
| return false; |
| } |
| |
| if ( annotations == null ) |
| { |
| return that.annotations == null; |
| } |
| else if ( that.annotations == null ) |
| { |
| return false; |
| } |
| |
| // Check all the annotation |
| for ( String key:annotations.keySet() ) |
| { |
| if ( !that.annotations.containsKey( key ) ) |
| { |
| return false; |
| } |
| |
| Object thisAnnotation = annotations.get( key ); |
| Object thatAnnotation = that.annotations.get( key ); |
| |
| if ( thisAnnotation == null ) |
| { |
| if ( thatAnnotation != null ) |
| { |
| return false; |
| } |
| } |
| else |
| { |
| if ( !thisAnnotation.equals( thatAnnotation ) ) |
| { |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| /** |
| * 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#printToBuffer(StringBuffer)} 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 Value<?> escapeFilterValue( Value<?> value ) |
| { |
| StringBuilder sb = null; |
| String val; |
| |
| if ( value.isBinary() ) |
| { |
| sb = new StringBuilder( ((ClientBinaryValue)value).getReference().length * 3 ); |
| |
| for ( byte b:((ClientBinaryValue)value).getReference() ) |
| { |
| if ( ( b < 0x7F ) && ( b >= 0 ) ) |
| { |
| switch ( b ) |
| { |
| case '*' : |
| sb.append( "\\2A" ); |
| break; |
| |
| case '(' : |
| sb.append( "\\28" ); |
| break; |
| |
| case ')' : |
| sb.append( "\\29" ); |
| break; |
| |
| case '\\' : |
| sb.append( "\\5C" ); |
| break; |
| |
| case '\0' : |
| sb.append( "\\00" ); |
| break; |
| |
| default : |
| sb.append( (char)b ); |
| } |
| } |
| else |
| { |
| sb.append( '\\' ); |
| String digit = Integer.toHexString( ((byte)b) & 0x00FF ); |
| |
| if ( digit.length() == 1 ) |
| { |
| sb.append( '0' ); |
| } |
| |
| sb.append( digit.toUpperCase() ); |
| } |
| } |
| |
| return new ClientStringValue( sb.toString() ); |
| } |
| |
| val = ( ( ClientStringValue ) value ).getString(); |
| |
| for ( int i = 0; i < val.length(); i++ ) |
| { |
| char ch = val.charAt( i ); |
| String replace = null; |
| |
| switch ( ch ) |
| { |
| case '*': |
| replace = "\\2A"; |
| break; |
| |
| case '(': |
| replace = "\\28"; |
| break; |
| |
| case ')': |
| replace = "\\29"; |
| break; |
| |
| case '\\': |
| replace = "\\5C"; |
| break; |
| |
| case '\0': |
| replace = "\\00"; |
| break; |
| } |
| |
| if ( replace != null ) |
| { |
| if ( sb == null ) |
| { |
| sb = new StringBuilder( val.length() * 2 ); |
| sb.append( val.substring( 0, i ) ); |
| } |
| sb.append( replace ); |
| } |
| else if ( sb != null ) |
| { |
| sb.append( ch ); |
| } |
| } |
| |
| return ( sb == null ? value : new ClientStringValue( sb.toString() ) ); |
| } |
| |
| |
| /** |
| * @see Object#hashCode() |
| * @return the instance's hash code |
| */ |
| public int hashCode() |
| { |
| int h = 37; |
| |
| if ( annotations != null ) |
| { |
| for ( String key:annotations.keySet() ) |
| { |
| Object value = annotations.get( key ); |
| |
| h = h*17 + key.hashCode(); |
| h = h*17 + ( value == null ? 0 : value.hashCode() ); |
| } |
| } |
| |
| return h; |
| } |
| |
| |
| /** |
| * @see org.apache.directory.shared.ldap.filter.ExprNode#get(java.lang.Object) |
| * |
| * @return the annotation value. |
| */ |
| public Object get( Object key ) |
| { |
| if ( null == annotations ) |
| { |
| return null; |
| } |
| |
| return annotations.get( key ); |
| } |
| |
| |
| /** |
| * @see org.apache.directory.shared.ldap.filter.ExprNode#set(java.lang.Object, |
| * java.lang.Object) |
| */ |
| public void set( String key, Object value ) |
| { |
| if ( null == annotations ) |
| { |
| annotations = new HashMap<String, Object>( 2 ); |
| } |
| |
| annotations.put( key, value ); |
| } |
| |
| |
| /** |
| * Gets the annotations as a Map. |
| * |
| * @return the annotation map. |
| */ |
| protected Map<String, Object> getAnnotations() |
| { |
| return annotations; |
| } |
| |
| /** |
| * Default implementation for this method : just throw an exception. |
| * |
| * @param buf the buffer to append to. |
| * @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 ) |
| { |
| throw new UnsupportedOperationException( "ScopeNode can't be part of a refinement" ); |
| } |
| |
| |
| /** |
| * Clone the object |
| */ |
| @Override public ExprNode clone() |
| { |
| try |
| { |
| ExprNode clone = (ExprNode)super.clone(); |
| |
| if ( annotations != null ) |
| { |
| for ( String key:annotations.keySet() ) |
| { |
| Object value = annotations.get( key ); |
| |
| // Note : the value aren't cloned ! |
| ((AbstractExprNode)clone).annotations.put( key, value ); |
| } |
| } |
| |
| return clone; |
| } |
| catch ( CloneNotSupportedException cnse ) |
| { |
| return null; |
| } |
| } |
| |
| |
| /** |
| * @see Object#toString() |
| */ |
| public String toString() |
| { |
| if ( ( null != annotations ) && annotations.containsKey( "count" ) ) |
| { |
| return ":[" + annotations.get( "count" ) + "]"; |
| } |
| else |
| { |
| return ""; |
| } |
| } |
| } |