diff options
Diffstat (limited to 'bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/ELGeneratorVisitor.java')
| -rw-r--r-- | bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/ELGeneratorVisitor.java | 464 |
1 files changed, 0 insertions, 464 deletions
diff --git a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/ELGeneratorVisitor.java b/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/ELGeneratorVisitor.java deleted file mode 100644 index 3a31984add..0000000000 --- a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/java/jspel/ELGeneratorVisitor.java +++ /dev/null @@ -1,464 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2005 BEA Systems and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * BEA Systems - initial implementation - * - * Bug 154474 EL: 'and', 'or', ... operator - * https://bugs.eclipse.org/bugs/show_bug.cgi?id=154474 - * Bernhard Huemer <bernhard.huemer@gmail.com> - * - *******************************************************************************/ -package org.eclipse.jst.jsp.core.internal.java.jspel; - -import java.util.HashMap; -import java.util.Iterator; -import java.util.List; -import java.util.Map; - -import org.eclipse.jface.text.Position; -import org.eclipse.jst.jsp.core.internal.contentmodel.TaglibController; -import org.eclipse.jst.jsp.core.internal.contentmodel.tld.CMDocumentImpl; -import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TLDCMDocumentManager; -import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TaglibTracker; -import org.eclipse.jst.jsp.core.internal.contentmodel.tld.provisional.TLDFunction; -import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument; -import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; -import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionCollection; - -public class ELGeneratorVisitor implements JSPELParserVisitor { - - private static final String ENDL = "\n"; //$NON-NLS-1$ - - private static final String fExpressionHeader1 = "public String _elExpression"; //$NON-NLS-1$ - private static final String fExpressionHeader2 = "()" + ENDL + //$NON-NLS-1$ - "\t\tthrows java.io.IOException, javax.servlet.ServletException {" + ENDL + //$NON-NLS-1$ - "javax.servlet.jsp.PageContext pageContext = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map param = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map paramValues = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map header = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map headerValues = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map cookie = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map initParam = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map pageScope = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map requestScope = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map sessionScope = null;" + ENDL + //$NON-NLS-1$ - "java.util.Map applicationScope = null;" + ENDL + //$NON-NLS-1$ - "return \"\"+"; //$NON-NLS-1$ - - private static final String fJspImplicitObjects[] = { "pageContext" }; //$NON-NLS-1$ - - private static final String fJspImplicitMaps[] = { "param", "paramValues", "header", "headerValues", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ - "cookie", "initParam", "pageScope", "requestScope", "sessionScope", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$ - "applicationScope" }; //$NON-NLS-1$ - - private static final HashMap fJSPImplicitObjectMap = new HashMap(fJspImplicitObjects.length); - static { - for(int i = 0; i < fJspImplicitObjects.length; i++) { - fJSPImplicitObjectMap.put(fJspImplicitObjects[i], new Boolean(true)); - } - - for(int i = 0; i < fJspImplicitMaps.length; i++) { - fJSPImplicitObjectMap.put(fJspImplicitMaps[i], new Boolean(false)); - } - } - - private static final String fFooter = " ;" + ENDL + "}" + ENDL; //$NON-NLS-1$ //$NON-NLS-2$ - - private StringBuffer fResult; - private Map fCodeMap; - private int fOffsetInUserCode; - private static int methodCounter = 0; - private IStructuredDocument fDocument = null; - private int fContentStart; - private static Map fOperatorMap; - - // this flag lets us know if we were unable to generate for some reason. One possible reason is that the expression - // contains a reference to a variable for which information is only available at runtime. - private boolean fCanGenerate = true; - - private IStructuredDocumentRegion fCurrentNode; - - /** - * Tranlsation of XML-style operators to java - */ - static { - fOperatorMap = new HashMap(); - fOperatorMap.put("gt", ">"); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("lt", "<"); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("ge", ">="); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("le", "<="); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("mod", "%"); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("eq", "=="); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("and", "&&"); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("or", "||"); //$NON-NLS-1$ //$NON-NLS-2$ - fOperatorMap.put("not", "!"); //$NON-NLS-1$ //$NON-NLS-2$ - } - - /** - * The constructor squirrels away a few things we'll need later - * - * @param result - * @param codeMap - * @param translator - * @param jspReferenceRegion - * @param contentStart - */ - public ELGeneratorVisitor(StringBuffer result, IStructuredDocumentRegion currentNode, Map codeMap, IStructuredDocument document, ITextRegionCollection jspReferenceRegion, int contentStart) - { - fResult = result; - fCodeMap = codeMap; - fOffsetInUserCode = result.length(); - fContentStart = contentStart; - fDocument = document; - fCurrentNode = currentNode; - } - - /** - * Append a token to the output stream. Automatically calculating mapping. - * - * @param token - */ - private void append(Token token) - { - append(token.image, token.beginColumn - 1, token.endColumn); - } - - /** - * Append a translation for the corresponding input token. - * - * @param translated - * @param token - */ - private void append(String translated, Token token) - { - append(translated, token.beginColumn - 1, token.endColumn); - } - - /** - * Append a string explicitly giving the input mapping. - * - * @param newText - * @param jspPositionStart - * @param jspPositionEnd - */ - private void append(String newText, int jspPositionStart, int jspPositionEnd) - { - fResult.append(newText); - Position javaRange = new Position(fOffsetInUserCode, newText.length()); - Position jspRange = new Position(fContentStart + jspPositionStart, jspPositionEnd - jspPositionStart); - - fCodeMap.put(javaRange, jspRange); - fOffsetInUserCode += newText.length(); - } - - /** - * Append text that will be unmapped and therefore will not be available for completion. - * - * @param newText - */ - private void append(String newText) - { - fResult.append(newText); - fOffsetInUserCode += newText.length(); - } - - /** - * Generate a function invocation. - * - * @param fullFunctionName - * @return - */ - protected String genFunction(String fullFunctionName) { - TLDCMDocumentManager docMgr = TaglibController.getTLDCMDocumentManager(fDocument); - int colonIndex = fullFunctionName.indexOf(':'); - String prefix = fullFunctionName.substring(0, colonIndex); - String functionName = fullFunctionName.substring(colonIndex + 1); - if (docMgr == null) - return null; - - Iterator taglibs = docMgr.getCMDocumentTrackers(fCurrentNode.getStartOffset()).iterator(); - while (taglibs.hasNext()) { - TaglibTracker tracker = (TaglibTracker)taglibs.next(); - if(tracker.getPrefix().equals(prefix)) { - CMDocumentImpl doc = (CMDocumentImpl)tracker.getDocument(); - - List functions = doc.getFunctions(); - for(Iterator it = functions.iterator(); it.hasNext(); ) { - TLDFunction function = (TLDFunction)it.next(); - if(function.getName().equals(functionName)) { - return function.getClassName() + "." + function.getName(); //$NON-NLS-1$ - } - } - } - } - return null; - } - - /** - * Handle a simple node -- fallback - */ - public Object visit(SimpleNode node, Object data) { - return(node.childrenAccept(this, data)); - } - - static synchronized int getMethodCounter() { - return methodCounter++; - } - - /** - * Handle top-level expression - */ - public Object visit(ASTExpression node, Object data) { - int start = node.getFirstToken().beginColumn - 1; - int end = node.lastToken.endColumn - 1; - append(fExpressionHeader1, start, start); - append(Integer.toString(getMethodCounter()), start, start); - append(fExpressionHeader2, start, start); - - Object retval = node.childrenAccept(this, data); - - append(fFooter, end, end); - - // something is preventing good code generation so empty out the result and the map. - if(!fCanGenerate) { - fResult.delete(0, fResult.length()); - fCodeMap.clear(); - } - return retval; - } - - /** - * Generically generate an operator node. - * - * @param node - * @param data - */ - private void generateOperatorNode(ASTOperatorExpression node, Object data) { - for(int i = 0; i < node.children.length; i++) { - node.children[i].jjtAccept(this, data); - if( node.children.length - i > 1) { - appendOperator((Token)node.getOperatorTokens().get(i)); - } - } - } - - /** - * Append an operator to the output stream after translation (if any) - * - * @param token - * @return - */ - private String appendOperator(Token token) { - String tokenImage = token.image.trim(); - String translated = (String)fOperatorMap.get(tokenImage); - if(null != translated) { - append(translated, token); - } else { - append(token); - } - return(translated); - } - - /** - * Handle or Expression - */ - public Object visit(ASTOrExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Handle and expression - */ - public Object visit(ASTAndExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Handle equality - */ - public Object visit(ASTEqualityExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Handle Relational - */ - public Object visit(ASTRelationalExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Handle addition - */ - public Object visit(ASTAddExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Handle multiply - */ - public Object visit(ASTMultiplyExpression node, Object data) { - generateOperatorNode(node, data); - return(null); - } - - - /** - * Choice Expression (ternary operator) - */ - public Object visit(ASTChoiceExpression node, Object data) { - node.children[0].jjtAccept(this, data); - append("?"); //$NON-NLS-1$ - node.children[1].jjtAccept(this, data); - append(":"); //$NON-NLS-1$ - node.children[2].jjtAccept(this,data); - return null; - } - - - /** - * Handle unary - */ - public Object visit(ASTUnaryExpression node, Object data) { - if(JSPELParserConstants.EMPTY == node.firstToken.kind) { - append("((null == "); //$NON-NLS-1$ - node.childrenAccept(this, data); - append(") || ("); //$NON-NLS-1$ - node.childrenAccept(this, data); - append(").isEmpty())"); //$NON-NLS-1$ - } else if(JSPELParserConstants.NOT1 == node.firstToken.kind || JSPELParserConstants.NOT2 == node.firstToken.kind) { - append("(!"); //$NON-NLS-1$ - node.childrenAccept(this, data); - append(")"); //$NON-NLS-1$ - } else if(JSPELParserConstants.MINUS == node.firstToken.kind) { - append("(-"); //$NON-NLS-1$ - node.childrenAccept(this, data); - append(")"); //$NON-NLS-1$ - } else { - node.childrenAccept(this, data); - } - return null; - } - - - /** - * Value node - */ - public Object visit(ASTValue node, Object data) { - if(node.jjtGetNumChildren() >= 2) { - if(node.jjtGetChild(0) instanceof ASTValuePrefix && node.jjtGetChild(1) instanceof ASTValueSuffix) { - ASTValuePrefix prefix = (ASTValuePrefix) node.jjtGetChild(0); - ASTValueSuffix suffix = (ASTValueSuffix) node.jjtGetChild(1); - if(prefix.firstToken.image.equals("pageContext") && suffix.getPropertyNameToken().image.equals("request")) { - append("((HTTPServletRequest)"); - } - } - } - return node.childrenAccept(this, data); - } - - - /** - * Value Prefix - */ - public Object visit(ASTValuePrefix node, Object data) { - // this is a raw identifier. May sure it's an implicit object. - // This is the primary plae where modification is needed to - // support JSF backing beans. - if(null == node.children) { - if(isCompletingObject(node.firstToken.image)) { - append(node.firstToken); - } else { - fCanGenerate = false; - } - return(null); - } - return node.childrenAccept(this, data); - } - - - /** - * Function for testing implicit objects. - * - * @param image - * @return - */ - private boolean isCompletingObject(String image) { - Boolean value = (Boolean)fJSPImplicitObjectMap.get(image); - return null == value ? false : value.booleanValue(); - } - - /** - * Value suffix - */ - public Object visit(ASTValueSuffix node, Object data) { - if(JSPELParserConstants.LBRACKET == node.firstToken.kind) { - fCanGenerate = false; - } else if(null != node.getPropertyNameToken()) { - Token suffix = node.getPropertyNameToken(); - String ucaseName = suffix.image.substring(0, 1).toUpperCase() + suffix.image.substring(1, suffix.image.length()); - - // This is a special case. Note that the type system, no matter how much type information - // we would have wouldn't give us the correct result. We're looking for "pageContext.request" - // here and will add a downcast to (HTTPServletRequest) - - append(node.firstToken); - append("get" + ucaseName + "()", suffix); //$NON-NLS-1$ //$NON-NLS-2$ - - SimpleNode parent = (SimpleNode) node.jjtGetParent(); - if(suffix.image.equals("request") && parent instanceof ASTValue && //$NON-NLS-1$ - parent.jjtGetParent() instanceof ASTUnaryExpression && parent.firstToken.image.equals("pageContext")) { //$NON-NLS-1$ - append(")"); - } - - - } else { - append(node.firstToken); - } - return null; - } - - - /** - * Function invocation - */ - public Object visit(ASTFunctionInvocation node, Object data) { - String functionTranslation = genFunction(node.getFullFunctionName()); - if(null != functionTranslation) - { - append(functionTranslation + "(", node.getFirstToken()); //$NON-NLS-1$ - for(int i = 0; i < node.children.length; i++) { - node.children[i].jjtAccept(this, data); - if( node.children.length - i > 1){ - append(","); //$NON-NLS-1$ - } - } - append(")"); //$NON-NLS-1$ - } - return null; - } - - /** - * Literal - */ - public Object visit(ASTLiteral node, Object data) { - // TODO any further translation needed? - append(node.firstToken); - return null; - } -} |