diff options
Diffstat (limited to 'src/com/sun/org/apache/xalan/internal/xsltc/compiler/FunctionAvailableCall.java')
-rw-r--r-- | src/com/sun/org/apache/xalan/internal/xsltc/compiler/FunctionAvailableCall.java | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/src/com/sun/org/apache/xalan/internal/xsltc/compiler/FunctionAvailableCall.java b/src/com/sun/org/apache/xalan/internal/xsltc/compiler/FunctionAvailableCall.java deleted file mode 100644 index 8cad427..0000000 --- a/src/com/sun/org/apache/xalan/internal/xsltc/compiler/FunctionAvailableCall.java +++ /dev/null @@ -1,196 +0,0 @@ -/* - * reserved comment block - * DO NOT REMOVE OR ALTER! - */ -/* - * Copyright 2001-2004 The Apache Software Foundation. - * - * Licensed 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. - */ -/* - * $Id: FunctionAvailableCall.java,v 1.2.4.1 2005/09/01 15:30:25 pvedula Exp $ - */ - -package com.sun.org.apache.xalan.internal.xsltc.compiler; - -import java.lang.reflect.Method; -import java.lang.reflect.Modifier; -import java.util.Vector; - -import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; -import com.sun.org.apache.bcel.internal.generic.PUSH; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; -import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util; -import com.sun.org.apache.xalan.internal.utils.ObjectFactory; - -/** - * @author G. Todd Miller - * @author Santiago Pericas-Geertsen - */ -final class FunctionAvailableCall extends FunctionCall { - - private Expression _arg; - private String _nameOfFunct = null; - private String _namespaceOfFunct = null; - private boolean _isFunctionAvailable = false; - - /** - * Constructs a FunctionAvailableCall FunctionCall. Takes the - * function name qname, for example, 'function-available', and - * a list of arguments where the arguments must be instances of - * LiteralExpression. - */ - public FunctionAvailableCall(QName fname, Vector arguments) { - super(fname, arguments); - _arg = (Expression)arguments.elementAt(0); - _type = null; - - if (_arg instanceof LiteralExpr) { - LiteralExpr arg = (LiteralExpr) _arg; - _namespaceOfFunct = arg.getNamespace(); - _nameOfFunct = arg.getValue(); - - if (!isInternalNamespace()) { - _isFunctionAvailable = hasMethods(); - } - } - } - - /** - * Argument of function-available call must be literal, typecheck - * returns the type of function-available to be boolean. - */ - public Type typeCheck(SymbolTable stable) throws TypeCheckError { - if (_type != null) { - return _type; - } - if (_arg instanceof LiteralExpr) { - return _type = Type.Boolean; - } - ErrorMsg err = new ErrorMsg(ErrorMsg.NEED_LITERAL_ERR, - "function-available", this); - throw new TypeCheckError(err); - } - - /** - * Returns an object representing the compile-time evaluation - * of an expression. We are only using this for function-available - * and element-available at this time. - */ - public Object evaluateAtCompileTime() { - return getResult() ? Boolean.TRUE : Boolean.FALSE; - } - - /** - * for external java functions only: reports on whether or not - * the specified method is found in the specifed class. - */ - private boolean hasMethods() { - LiteralExpr arg = (LiteralExpr)_arg; - - // Get the class name from the namespace uri - String className = getClassNameFromUri(_namespaceOfFunct); - - // Get the method name from the argument to function-available - String methodName = null; - int colonIndex = _nameOfFunct.indexOf(":"); - if (colonIndex > 0) { - String functionName = _nameOfFunct.substring(colonIndex+1); - int lastDotIndex = functionName.lastIndexOf('.'); - if (lastDotIndex > 0) { - methodName = functionName.substring(lastDotIndex+1); - if (className != null && !className.equals("")) - className = className + "." + functionName.substring(0, lastDotIndex); - else - className = functionName.substring(0, lastDotIndex); - } - else - methodName = functionName; - } - else - methodName = _nameOfFunct; - - if (className == null || methodName == null) { - return false; - } - - // Replace the '-' characters in the method name - if (methodName.indexOf('-') > 0) - methodName = replaceDash(methodName); - - try { - final Class clazz = ObjectFactory.findProviderClass(className, true); - - if (clazz == null) { - return false; - } - - final Method[] methods = clazz.getMethods(); - - for (int i = 0; i < methods.length; i++) { - final int mods = methods[i].getModifiers(); - - if (Modifier.isPublic(mods) && Modifier.isStatic(mods) - && methods[i].getName().equals(methodName)) - { - return true; - } - } - } - catch (ClassNotFoundException e) { - return false; - } - return false; - } - - /** - * Reports on whether the function specified in the argument to - * xslt function 'function-available' was found. - */ - public boolean getResult() { - if (_nameOfFunct == null) { - return false; - } - - if (isInternalNamespace()) { - final Parser parser = getParser(); - _isFunctionAvailable = - parser.functionSupported(Util.getLocalName(_nameOfFunct)); - } - return _isFunctionAvailable; - } - - /** - * Return true if the namespace uri is null or it is the XSLTC translet uri. - */ - private boolean isInternalNamespace() { - return (_namespaceOfFunct == null || - _namespaceOfFunct.equals(EMPTYSTRING) || - _namespaceOfFunct.equals(TRANSLET_URI)); - } - - /** - * Calls to 'function-available' are resolved at compile time since - * the namespaces declared in the stylsheet are not available at run - * time. Consequently, arguments to this function must be literals. - */ - public void translate(ClassGenerator classGen, MethodGenerator methodGen) { - final ConstantPoolGen cpg = classGen.getConstantPool(); - methodGen.getInstructionList().append(new PUSH(cpg, getResult())); - } - -} |