1 /* 2 * $Header: /cvsroot/jaxen/jaxen/src/java/main/org/jaxen/expr/DefaultFunctionCallExpr.java,v 1.7 2002/04/26 17:17:34 jstrachan Exp $ 3 * $Revision: 1.7 $ 4 * $Date: 2002/04/26 17:17:34 $ 5 * 6 * ==================================================================== 7 * 8 * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions, and the disclaimer that follows 20 * these conditions in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * 3. The name "Jaxen" must not be used to endorse or promote products 24 * derived from this software without prior written permission. For 25 * written permission, please contact license@jaxen.org. 26 * 27 * 4. Products derived from this software may not be called "Jaxen", nor 28 * may "Jaxen" appear in their name, without prior written permission 29 * from the Jaxen Project Management (pm@jaxen.org). 30 * 31 * In addition, we request (but do not require) that you include in the 32 * end-user documentation provided with the redistribution and/or in the 33 * software itself an acknowledgement equivalent to the following: 34 * "This product includes software developed by the 35 * Jaxen Project (http://www.jaxen.org/)." 36 * Alternatively, the acknowledgment may be graphical using the logos 37 * available at http://www.jaxen.org/ 38 * 39 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 40 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 42 * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT 43 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 45 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 46 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 47 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 48 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 49 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * ==================================================================== 53 * This software consists of voluntary contributions made by many 54 * individuals on behalf of the Jaxen Project and was originally 55 * created by bob mcwhirter <bob@werken.com> and 56 * James Strachan <jstrachan@apache.org>. For more information on the 57 * Jaxen Project, please see <http://www.jaxen.org/>. 58 * 59 * $Id: DefaultFunctionCallExpr.java,v 1.7 2002/04/26 17:17:34 jstrachan Exp $ 60 */ 61 62 63 64 package org.jaxen.expr; 65 66 import org.jaxen.Context; 67 import org.jaxen.Function; 68 import org.jaxen.FunctionCallException; 69 import org.jaxen.JaxenException; 70 71 import java.util.List; 72 import java.util.ArrayList; 73 import java.util.Iterator; 74 75 class DefaultFunctionCallExpr extends DefaultExpr implements FunctionCallExpr 76 { 77 private String prefix; 78 private String functionName; 79 private List parameters; 80 DefaultFunctionCallExpr(String prefix, String functionName)81 public DefaultFunctionCallExpr(String prefix, 82 String functionName) 83 { 84 this.prefix = prefix; 85 this.functionName = functionName; 86 this.parameters = new ArrayList(); 87 } 88 addParameter(Expr parameter)89 public void addParameter(Expr parameter) 90 { 91 this.parameters.add( parameter ); 92 } 93 getParameters()94 public List getParameters() 95 { 96 return this.parameters; 97 } 98 getPrefix()99 public String getPrefix() 100 { 101 return this.prefix; 102 } 103 getFunctionName()104 public String getFunctionName() 105 { 106 return this.functionName; 107 } 108 getText()109 public String getText() 110 { 111 StringBuffer buf = new StringBuffer(); 112 113 String prefix = getPrefix(); 114 115 if ( prefix != null 116 && 117 ! prefix.equals("") ) 118 { 119 buf.append( prefix ); 120 buf.append( ":" ); 121 } 122 123 buf.append( getFunctionName() ); 124 buf.append( "(" ); 125 126 Iterator paramIter = getParameters().iterator(); 127 Expr eachParam = null; 128 129 while ( paramIter.hasNext() ) 130 { 131 eachParam = (Expr) paramIter.next(); 132 133 buf.append( eachParam.getText() ); 134 135 if ( paramIter.hasNext() ) 136 { 137 buf.append( ", " ); 138 } 139 } 140 141 buf.append( ")" ); 142 143 return buf.toString(); 144 } 145 simplify()146 public Expr simplify() 147 { 148 List paramExprs = getParameters(); 149 int paramSize = paramExprs.size(); 150 Expr eachParam = null; 151 152 List newParams = new ArrayList( paramSize ); 153 154 for ( int i = 0 ; i < paramSize ; ++i ) 155 { 156 eachParam = (Expr) paramExprs.get( i ); 157 158 newParams.add( eachParam.simplify() ); 159 } 160 161 this.parameters = newParams; 162 163 return this; 164 } 165 toString()166 public String toString() 167 { 168 String prefix = getPrefix(); 169 170 if ( prefix == null ) 171 { 172 return "[(DefaultFunctionCallExpr): " + getFunctionName() + "(" + getParameters() + ") ]"; 173 } 174 175 return "[(DefaultFunctionCallExpr): " + getPrefix() + ":" + getFunctionName() + "(" + getParameters() + ") ]"; 176 } 177 evaluate(Context context)178 public Object evaluate(Context context) throws JaxenException 179 { 180 String namespaceURI = 181 context.translateNamespacePrefixToUri( getPrefix() ); 182 183 Function func = context.getFunction( namespaceURI, 184 getPrefix(), 185 getFunctionName() ); 186 187 List paramExprs = getParameters(); 188 int paramSize = paramExprs.size(); 189 190 List paramValues = new ArrayList( paramSize ); 191 Expr eachParam = null; 192 Object eachValue = null; 193 194 for ( int i = 0 ; i < paramSize ; ++i ) 195 { 196 eachParam = (Expr) paramExprs.get( i ); 197 198 eachValue = eachParam.evaluate( context ); 199 200 paramValues.add( eachValue ); 201 } 202 203 return func.call( context, paramValues ); 204 } 205 } 206