/
LSPJVMCompiler.java
2527 lines (2183 loc) · 80.8 KB
/
LSPJVMCompiler.java
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/*
* Copyright (c) 2003-2008, Mikael Ståldal
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* Note: This is known as "the modified BSD license". It's an approved
* Open Source and Free Software license, see
* http://www.opensource.org/licenses/
* and
* http://www.gnu.org/philosophy/license-list.html
*/
package nu.staldal.lsp.compiler;
import java.io.*;
import java.util.*;
import org.xml.sax.*;
import nu.staldal.util.Environment;
import nu.staldal.lsp.*;
import nu.staldal.lsp.expr.*;
import nu.staldal.lsp.compile.*;
import nu.staldal.lsp.compiledexpr.*;
import org.apache.bcel.Constants;
import org.apache.bcel.classfile.Field;
import org.apache.bcel.classfile.Method;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Unknown;
import org.apache.bcel.generic.*;
/**
* Compiles an LSP page into JVM bytecode.
*<p>
* An instance of this class may be reused, but is not thread safe.
*/
class LSPJVMCompiler implements Constants
{
private static final String EXT_LIBS_URLS = "_extLibsURLs";
private static final String EXT_LIBS_CLASS_NAMES = "_extLibsClassNames";
private static final String COMPILE_DEPENDENT_FILES = "_compileDependentFiles";
// private static final int PARAM_this = 0;
private static final int PARAM_origSax = 1;
private static final int PARAM_env = 2;
private static final int PARAM_extLibs = 3;
private static final int PARAM_sax = 4;
private static final int PARAM_attrs = 5;
private boolean acceptUnbound;
private String className = null;
private ClassGen classGen = null;
private ConstantPoolGen constGen = null;
private InstructionFactory instrFactory = null;
private HashMap<String,Integer> sourceFiles = null;
private int[] maxLineNumber = null;
private int splitNumber;
LSPJVMCompiler()
{
// default constructor
}
private String getFileName(String path)
{
int i = path.lastIndexOf('/');
if (i == -1)
return path;
else
return path.substring(i+1);
}
/**
* @param out where to write the generated bytecode
*/
void compileToByteCode(String pageName, LSPNode theTree,
HashMap<String,String> importedFiles, boolean compileDynamic,
HashMap<String,String> extLibsInPage, Properties outputProperties,
OutputStream out, boolean acceptUnbound, boolean hasEnclose)
throws IOException, SAXException
{
this.acceptUnbound = acceptUnbound;
splitNumber = 0;
className = "_LSP_"+pageName;
classGen = new ClassGen(className,
"nu.staldal.lsp.LSPPageBase",
pageName+".lsp",
ACC_PUBLIC | ACC_FINAL | ACC_SUPER,
new String[] {});
classGen.setMajor(49);
classGen.setMinor(0);
constGen = classGen.getConstantPool();
instrFactory = new InstructionFactory(classGen, constGen);
sourceFiles = new HashMap<String,Integer>(importedFiles.size() + (hasEnclose ? 1 : 0));
StringBuffer sourceMap = new StringBuffer();
sourceMap.append("SMAP\n");
sourceMap.append(pageName+".lsp" + '\n');
sourceMap.append("LSP\n");
sourceMap.append("*S LSP\n");
sourceMap.append("*F\n");
{
int i = 1;
sourceMap.append(i + " " + pageName+".lsp" + '\n');
if (hasEnclose)
{
i++;
sourceMap.append(i + " " + getFileName(theTree.getSystemId()) + '\n');
sourceFiles.put(theTree.getSystemId(), Integer.valueOf(i));
}
for (String key : importedFiles.keySet())
{
i++;
sourceMap.append(i + " " + getFileName(key) + '\n');
sourceFiles.put(importedFiles.get(key), Integer.valueOf(i));
}
}
maxLineNumber = new int[sourceFiles.size()+2];
classGen.addField(makeStringArrayField(EXT_LIBS_URLS, constGen));
classGen.addField(makeStringArrayField(EXT_LIBS_CLASS_NAMES, constGen));
classGen.addField(makeStringArrayField(COMPILE_DEPENDENT_FILES, constGen));
InstructionList instrList = new InstructionList();
MethodGen constr = new MethodGen(ACC_PUBLIC, Type.VOID, Type.NO_ARGS,
new String[] {}, "<init>", className, instrList, constGen);
instrList.append(instrFactory.createLoad(Type.OBJECT, 0));
instrList.append(InstructionConstants.DUP);
instrList.append(instrFactory.createFieldAccess(className, EXT_LIBS_URLS, new ArrayType(Type.STRING, 1), GETSTATIC));
instrList.append(instrFactory.createFieldAccess(className, EXT_LIBS_CLASS_NAMES, new ArrayType(Type.STRING, 1), GETSTATIC));
instrList.append(instrFactory.createFieldAccess(className, COMPILE_DEPENDENT_FILES, new ArrayType(Type.STRING, 1), GETSTATIC));
instrList.append(new PUSH(constGen, compileDynamic ? 1 : 0));
instrList.append(new PUSH(constGen, System.currentTimeMillis()));
instrList.append(new PUSH(constGen, pageName));
instrList.append(new PUSH(constGen, LSPPage.LSP_VERSION_NAME));
instrList.append(new PUSH(constGen, LSPPage.LSP_VERSION_NUM));
instrList.append(instrFactory.createInvoke(LSPPageBase.class.getName(),
"<init>", Type.VOID,
new Type[] { new ArrayType(Type.STRING, 1), new ArrayType(Type.STRING, 1),
new ArrayType(Type.STRING, 1), Type.BOOLEAN, Type.LONG, Type.STRING,
Type.STRING, Type.INT },
INVOKESPECIAL));
for (Enumeration<?> e = outputProperties.propertyNames(); e.hasMoreElements(); )
{
String key = (String)e.nextElement();
String value = outputProperties.getProperty(key);
instrList.append(InstructionConstants.DUP);
instrList.append(new PUSH(constGen, key));
instrList.append(new PUSH(constGen, value));
instrList.append(instrFactory.createInvoke(LSPPageBase.class.getName(),
"setOutputProperty", Type.VOID,
new Type[] { Type.STRING, Type.STRING },
INVOKEVIRTUAL));
}
instrList.append(InstructionConstants.POP);
instrList.append(instrFactory.createReturn(Type.VOID));
constr.setMaxStack();
constr.setMaxLocals();
classGen.addMethod(constr.getMethod());
instrList.dispose();
constr = null;
ArrayList<String> extLibsURLs = new ArrayList<String>(extLibsInPage.size());
ArrayList<String> extLibsClassNames = new ArrayList<String>(extLibsInPage.size());
for (Map.Entry<String,String> ent : extLibsInPage.entrySet())
{
extLibsURLs.add(ent.getKey());
extLibsClassNames.add(ent.getValue());
}
instrList = new InstructionList();
MethodGen staticInit = new MethodGen(ACC_STATIC, Type.VOID, Type.NO_ARGS,
new String[] {}, "<clinit>", className, instrList, constGen);
instrList.append(new PUSH(constGen, extLibsURLs.size()));
instrList.append(instrFactory.createNewArray(Type.STRING, (short)1));
for (int i = 0; i<extLibsURLs.size(); i++)
{
instrList.append(InstructionConstants.DUP);
instrList.append(new PUSH(constGen, i));
instrList.append(new PUSH(constGen, extLibsURLs.get(i)));
instrList.append(InstructionConstants.AASTORE);
}
instrList.append(instrFactory.createFieldAccess(className, EXT_LIBS_URLS, new ArrayType(Type.STRING, 1), PUTSTATIC));
instrList.append(new PUSH(constGen, extLibsClassNames.size()));
instrList.append(instrFactory.createNewArray(Type.STRING, (short)1));
for (int i = 0; i<extLibsClassNames.size(); i++)
{
instrList.append(InstructionConstants.DUP);
instrList.append(new PUSH(constGen, i));
instrList.append(new PUSH(constGen, extLibsClassNames.get(i)));
instrList.append(InstructionConstants.AASTORE);
}
instrList.append(instrFactory.createFieldAccess(className, EXT_LIBS_CLASS_NAMES, new ArrayType(Type.STRING, 1), PUTSTATIC));
instrList.append(new PUSH(constGen, importedFiles.size()));
instrList.append(instrFactory.createNewArray(Type.STRING, (short)1));
{ int i = 0;
for (Iterator<String> iter = importedFiles.keySet().iterator();
iter.hasNext(); i++)
{
instrList.append(InstructionConstants.DUP);
instrList.append(new PUSH(constGen, i));
instrList.append(new PUSH(constGen, iter.next()));
instrList.append(InstructionConstants.AASTORE);
} }
instrList.append(instrFactory.createFieldAccess(className, COMPILE_DEPENDENT_FILES, new ArrayType(Type.STRING, 1), PUTSTATIC));
instrList.append(instrFactory.createReturn(Type.VOID));
staticInit.setMaxStack();
staticInit.setMaxLocals();
classGen.addMethod(staticInit.getMethod());
instrList.dispose();
staticInit = null;
Method theMethod;
int methodLength;
try {
theMethod = createExecuteMethod("_execute", theTree, 0);
methodLength = theMethod.getCode().getCode().length;
}
catch (ClassGenException e)
{
theMethod = null;
methodLength = Integer.MAX_VALUE;
}
if (methodLength > 65535)
{
theMethod = createExecuteMethod("_execute", theTree, 1);
methodLength = theMethod.getCode().getCode().length;
if (methodLength > 65535)
throw new LSPException("Generated method too large: " + methodLength);
}
classGen.addMethod(theMethod);
sourceMap.append("*L\n");
for (int i = 1; i<maxLineNumber.length; i++)
{
int fakeLineNumber = (i==1) ? 1 : 10000+1000*i+1;
sourceMap.append("1#"+i+","+maxLineNumber[i]+":"+fakeLineNumber+",1\n");
}
sourceMap.append("*V\n");
sourceMap.append("nu.staldal.lsp\n");
sourceMap.append("*E\n");
byte[] smap = sourceMap.toString().getBytes("UTF-8");
sourceMap = null;
classGen.addAttribute(new Unknown(constGen.addUtf8("SourceDebugExtension"),
smap.length, smap,
constGen.getConstantPool()));
smap = null;
JavaClass generatedClass = classGen.getJavaClass();
generatedClass.dump(out);
instrFactory = null;
constGen = null;
classGen = null;
className = null;
}
private Field makeStringArrayField(String fieldName,
ConstantPoolGen constGen)
{
FieldGen fieldGen = new FieldGen(
ACC_PRIVATE | ACC_STATIC | ACC_FINAL,
new ArrayType(Type.STRING,1),
fieldName,
constGen);
return fieldGen.getField();
}
private Method createExecuteMethod(String methodName, LSPNode theTree, int split)
throws SAXException, ClassGenException
{
InstructionList instrList = new InstructionList();
MethodGen methodGen = new MethodGen(ACC_PROTECTED|ACC_FINAL,
Type.VOID, // return types
new Type[] { Type.getType(ContentHandler.class),
Type.getType(Environment.class),
Type.getType(Map.class),
Type.getType(ContentHandler.class),
Type.getType(org.xml.sax.helpers.AttributesImpl.class) },
new String[] { "sax", "env",
"extLibs", "_sax", "_attrs" }, // arg names
methodName, // method name
className, // class name
instrList, constGen);
compileNode(theTree, methodGen, instrList, split);
// code at end
instrList.append(instrFactory.createReturn(Type.VOID));
methodGen.addException(SAXException.class.getName());
methodGen.addException(IllegalArgumentException.class.getName());
methodGen.removeNOPs();
methodGen.setMaxStack();
methodGen.setMaxLocals();
Method m = methodGen.getMethod();
instrList.dispose();
return m;
}
private Method createSplitMethod(LSPNode theNode)
throws SAXException
{
String methodName = "_executeSplit" + (splitNumber++);
Method theMethod;
int methodLength;
try {
theMethod = createExecuteMethod(methodName, theNode, 0);
methodLength = theMethod.getCode().getCode().length;
}
catch (ClassGenException e)
{
theMethod = null;
methodLength = Integer.MAX_VALUE;
}
if (methodLength > 65535)
{
try {
theMethod = createExecuteMethod(methodName, theNode, 1);
methodLength = theMethod.getCode().getCode().length;
}
catch (ClassGenException e)
{
throw new LSPException("Generated split method too large: " + e.getMessage());
}
if (methodLength > 65535)
throw new LSPException("Generated split method too large: " + methodLength);
}
return theMethod;
}
private void compileNode(LSPNode node,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
if (node instanceof LSPSimpleContainer)
{
compileChildren((LSPSimpleContainer)node, methodGen, instrList, split);
}
else
{
Integer _fileId = sourceFiles.get(node.getSystemId());
if (_fileId != null)
{
int fakeLineNumber =
10000+1000*_fileId.intValue()+node.getLineNumber();
methodGen.addLineNumber(instrList.append(InstructionConstants.NOP),
fakeLineNumber);
maxLineNumber[_fileId.intValue()] = node.getLineNumber();
}
else
{
methodGen.addLineNumber(instrList.append(InstructionConstants.NOP),
node.getLineNumber());
maxLineNumber[1] = node.getLineNumber();
}
if (node instanceof LSPExtElement)
compileNode((LSPExtElement)node, methodGen, instrList, split);
else if (node instanceof LSPElement)
compileNode((LSPElement)node, methodGen, instrList, split);
else if (node instanceof LSPText)
compileNode((LSPText)node, methodGen, instrList, split);
else if (node instanceof LSPIf)
compileNode((LSPIf)node, methodGen, instrList, split);
else if (node instanceof LSPChoose)
compileNode((LSPChoose)node, methodGen, instrList, split);
else if (node instanceof LSPForEach)
compileNode((LSPForEach)node, methodGen, instrList, split);
else if (node instanceof LSPLet)
compileNode((LSPLet)node, methodGen, instrList, split);
else if (node instanceof LSPTemplate)
compileNode((LSPTemplate)node, methodGen, instrList, split);
else if (node instanceof LSPProcessingInstruction)
compileNode((LSPProcessingInstruction)node, methodGen, instrList, split);
else
throw new SAXParseException("Unrecognized LSPNode: "
+ node.getClass().getName(), node);
}
}
private void compileChildren(LSPContainer el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
for (int i = 0; i < el.numberOfChildren(); i++)
{
LSPNode child = el.getChild(i);
if (split > 0)
{
Method splitMethod = createSplitMethod(child);
if (splitMethod.getCode().getCode().length > 20)
{
classGen.addMethod(splitMethod);
instrList.append(instrFactory.createThis());
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_origSax));
instrList.append(instrFactory.createLoad(
Type.getType(Environment.class),
PARAM_env));
instrList.append(instrFactory.createLoad(
Type.getType(Map.class),
PARAM_extLibs));
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.helpers.AttributesImpl.class),
PARAM_attrs));
instrList.append(instrFactory.createInvoke(
className,
splitMethod.getName(), Type.VOID,
new Type[] { Type.getType(ContentHandler.class),
Type.getType(Environment.class),
Type.getType(Map.class),
Type.getType(ContentHandler.class),
Type.getType(org.xml.sax.helpers.AttributesImpl.class) },
INVOKEVIRTUAL));
}
else
{
compileNode(child, methodGen, instrList, 0);
}
}
else
{
compileNode(child, methodGen, instrList, split);
}
}
}
private void compileNode(LSPElement el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
for (int i = 0; i < el.numberOfNamespaceMappings(); i++)
{
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
String[] m = el.getNamespaceMapping(i);
// sax.startPrefixMapping(m[0], m[1]);
instrList.append(new PUSH(constGen, m[0]));
instrList.append(new PUSH(constGen, m[1]));
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"startPrefixMapping",
Type.VOID,
new Type[] { Type.STRING, Type.STRING },
INVOKEINTERFACE));
}
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_attrs));
instrList.append(InstructionConstants.DUP);
instrList.append(instrFactory.createInvoke(
org.xml.sax.helpers.AttributesImpl.class.getName(),
"clear", Type.VOID, Type.NO_ARGS,
INVOKEVIRTUAL));
for (int i = 0; i < el.numberOfAttributes(); i++)
{
LSPExpr localExpr = el.getAttributeLocalName(i);
if ((localExpr instanceof StringLiteral)
&& ((StringLiteral)localExpr).getValue().length() == 0)
continue;
instrList.append(InstructionConstants.DUP); // DUP _saxAtts
// String URL = evalExprAsString(el.getAttributeNamespaceURI(i));
compileExprAsString(el.getAttributeNamespaceURI(i), methodGen, instrList);
if ((localExpr instanceof StringLiteral)
&& ((StringLiteral)localExpr).getValue().indexOf(':') > -1)
throw new SAXParseException("<lsp:attribute> may not use QName", el);
if ((localExpr instanceof StringLiteral)
&& ((StringLiteral)localExpr).getValue().equals("xmlns"))
throw new SAXParseException("<lsp:attribute> may not add xmlns", el);
// String local = evalExprAsString(el.getAttributeLocalName(i));
compileExprAsString(localExpr, methodGen, instrList);
BranchInstruction longBranch = null;
if ((localExpr instanceof StringLiteral)
&& ((StringLiteral)localExpr).getValue().length() > 0)
{
}
else
{
// if (local.length() == 0) continue; // ignore attributes with empty name
instrList.append(InstructionConstants.DUP);
instrList.append(instrFactory.createInvoke(
String.class.getName(), "length",
Type.INT, Type.NO_ARGS, INVOKEVIRTUAL));
BranchInstruction shortBranch = instrFactory.createBranchInstruction(
IFNE, null);
instrList.append(shortBranch);
instrList.append(InstructionConstants.POP2);
instrList.append(InstructionConstants.POP);
longBranch = instrFactory.createBranchInstruction(GOTO, null);
instrList.append(longBranch);
shortBranch.setTarget(instrList.append(InstructionConstants.NOP));
}
// String qName = "";
instrList.append(new PUSH(constGen, ""));
// String type = el.getAttributeType(i);
instrList.append(new PUSH(constGen, el.getAttributeType(i)));
// String value = evalExprAsString(el.getAttributeValue(i));
Class<?> valueType = compileExpr(
el.getAttributeValue(i), methodGen, instrList);
if (valueType == Boolean.class)
{
try {
instrList.delete(instrList.getEnd());
}
catch (TargetLostException e)
{
throw new LSPException("Internal error in LSP compiler: " + e.getMessage());
}
BranchInstruction shortBranch = instrFactory.createBranchInstruction(
IFNE, null);
instrList.append(shortBranch);
instrList.append(InstructionConstants.POP2);
instrList.append(InstructionConstants.POP2);
instrList.append(InstructionConstants.POP);
longBranch = instrFactory.createBranchInstruction(GOTO, null);
instrList.append(longBranch);
shortBranch.setTarget(instrList.append(InstructionConstants.NOP));
compileExprAsString(localExpr, methodGen, instrList);
}
else if (valueType == String.class)
{
}
else
{
instrList.append(instrFactory.createInvoke(
LSPPageBase.class.getName(),
"convertToString",
Type.STRING,
new Type[] { Type.OBJECT },
INVOKESTATIC));
}
// saxAtts.addAttribute(URI, local, qName, type, value);
instrList.append(instrFactory.createInvoke(
org.xml.sax.helpers.AttributesImpl.class.getName(),
"addAttribute",
Type.VOID,
new Type[] { Type.STRING, Type.STRING, Type.STRING, Type.STRING, Type.STRING },
INVOKEVIRTUAL));
if (longBranch != null)
longBranch.setTarget(instrList.append(InstructionConstants.NOP));
}
LocalVariableGen _nsURI = methodGen.addLocalVariable("nsURI",
Type.STRING, null, null);
LocalVariableGen _localName = methodGen.addLocalVariable("localName",
Type.STRING, null, null);
if (el.getLocalName() == null)
{
// (el.getNamespaceURIExpr() != null)
// ? evalExprAsString(el.getNamespaceURIExpr())
// : "";
if (el.getNamespaceURIExpr() != null)
compileExprAsString(el.getNamespaceURIExpr(), methodGen, instrList);
else
instrList.append(new PUSH(constGen, ""));
// String nsURI = evalExprAsString(el.getNamespaceURIExpr());
instrList.append(InstructionConstants.DUP);
_nsURI.setStart(instrList.append(new ASTORE(_nsURI.getIndex())));
instrList.append(InstructionConstants.SWAP); // swap _saxAttr
LSPExpr localNameExpr = el.getLocalNameExpr();
if ((localNameExpr instanceof StringLiteral)
&& ((StringLiteral)localNameExpr).getValue().indexOf(':') > -1)
throw new SAXParseException("<lsp:element> may not use QName", el);
// String localName = evalExprAsString(el.getLocalNameExpr());
compileExprAsString(localNameExpr, methodGen, instrList);
instrList.append(InstructionConstants.DUP);
_localName.setStart(instrList.append(new ASTORE(_localName.getIndex())));
instrList.append(InstructionConstants.SWAP); // swap _saxAttr
}
else
{
// String nsURI = el.getNamespaceURI();
instrList.append(new PUSH(constGen, el.getNamespaceURI()));
instrList.append(InstructionConstants.DUP);
_nsURI.setStart(instrList.append(new ASTORE(_nsURI.getIndex())));
instrList.append(InstructionConstants.SWAP); // swap _saxAttr
// String localName = el.getLocalName();
instrList.append(new PUSH(constGen, el.getLocalName()));
instrList.append(InstructionConstants.DUP);
_localName.setStart(instrList.append(new ASTORE(_localName.getIndex())));
instrList.append(InstructionConstants.SWAP); // swap _saxAttr
}
// String qName = "";
instrList.append(new PUSH(constGen, ""));
instrList.append(InstructionConstants.SWAP); // swap _saxAttr
// sax.startElement(nsURI, localName, qName, saxAtts);
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"startElement",
Type.VOID,
new Type[] { Type.STRING, Type.STRING, Type.STRING,
Type.getType(org.xml.sax.Attributes.class) },
INVOKEINTERFACE));
compileChildren(el, methodGen, instrList, split);
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(new ALOAD(_nsURI.getIndex()));
instrList.append(new ALOAD(_localName.getIndex()));
// String qName = "";
InstructionHandle endOfVars = instrList.append(new PUSH(constGen, ""));
_nsURI.setEnd(endOfVars);
_localName.setEnd(endOfVars);
// sax.endElement(nsURI, localName, qName);
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"endElement",
Type.VOID,
new Type[] { Type.STRING, Type.STRING, Type.STRING },
INVOKEINTERFACE));
for (int i = 0; i < el.numberOfNamespaceMappings(); i++)
{
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
String[] m = el.getNamespaceMapping(i);
// sax.endPrefixMapping(m[0]);
instrList.append(new PUSH(constGen, m[0]));
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"endPrefixMapping",
Type.VOID,
new Type[] { Type.STRING },
INVOKEINTERFACE));
}
}
private void compileNode(LSPExtElement el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
// LSPExtLib extLib = (LSPExtLib)extLibs.get(el.getClassName());
instrList.append(instrFactory.createLoad(
Type.getType(Map.class), PARAM_extLibs));
instrList.append(new PUSH(constGen, el.getClassName()));
instrList.append(instrFactory.createInvoke(
Map.class.getName(),
"get",
Type.OBJECT,
new Type[] { Type.OBJECT },
INVOKEINTERFACE));
instrList.append(InstructionConstants.DUP); // DUP extLib
// ContentHandler in = extLib.beforeElement(sax);
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(instrFactory.createInvoke(
LSPExtLib.class.getName(),
"beforeElement",
Type.getType(ContentHandler.class),
new Type[] { Type.getType(ContentHandler.class) },
INVOKEINTERFACE));
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(InstructionConstants.SWAP);
instrList.append(instrFactory.createStore(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
compileNode((LSPElement)el, methodGen, instrList, split);
instrList.append(instrFactory.createStore(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
// String res = extLib.afterElement();
instrList.append(instrFactory.createInvoke(
LSPExtLib.class.getName(),
"afterElement",
Type.STRING,
Type.NO_ARGS,
INVOKEINTERFACE));
// if (res != null) outputStringWithoutCR(sax, res, false);
instrList.append(InstructionConstants.DUP);
BranchInstruction branch1 = instrFactory.createBranchInstruction(
IFNULL, null);
instrList.append(branch1);
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(InstructionConstants.SWAP);
instrList.append(new PUSH(constGen, 0));
instrList.append(instrFactory.createInvoke(
LSPPageBase.class.getName(),
"outputStringWithoutCR",
Type.VOID,
new Type[] { Type.getType(ContentHandler.class), Type.STRING, Type.BOOLEAN },
INVOKESTATIC));
BranchInstruction branch2 = instrFactory.createBranchInstruction(
GOTO, null);
instrList.append(branch2);
branch1.setTarget(instrList.append(InstructionConstants.POP));
branch2.setTarget(instrList.append(InstructionConstants.NOP));
}
private void compileNode(LSPText text,
MethodGen methodGen, InstructionList instrList,
int split)
{
String chars = text.getValue();
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
// sax.characters(chars, 0, chars.length);
instrList.append(new PUSH(constGen, chars));
instrList.append(instrFactory.createInvoke(
String.class.getName(), "toCharArray",
new ArrayType(Type.CHAR, 1), Type.NO_ARGS, INVOKEVIRTUAL));
instrList.append(new PUSH(constGen, 0));
instrList.append(new PUSH(constGen, chars.length()));
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"characters",
Type.VOID,
new Type[] { new ArrayType(Type.CHAR, 1), Type.INT, Type.INT },
INVOKEINTERFACE));
}
private void compileNode(LSPProcessingInstruction el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
// StringHandler sh = new StringHandler();
instrList.append(instrFactory.createNew(
(ObjectType)Type.getType(StringHandler.class)));
instrList.append(InstructionConstants.DUP);
instrList.append(instrFactory.createInvoke(
StringHandler.class.getName(), "<init>", Type.VOID, Type.NO_ARGS,
INVOKESPECIAL));
instrList.append(instrFactory.createStore(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
compileNode(el.getData(), methodGen, instrList, split);
instrList.append(instrFactory.createLoad(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(instrFactory.createLoad(
Type.getType(ContentHandler.class), PARAM_origSax));
instrList.append(InstructionConstants.DUP);
instrList.append(instrFactory.createStore(
Type.getType(org.xml.sax.ContentHandler.class),
PARAM_sax));
instrList.append(InstructionConstants.SWAP);
compileExprAsString(el.getName(), methodGen, instrList);
instrList.append(InstructionConstants.SWAP);
// _data = sh.getBuf().toString();
instrList.append(instrFactory.createInvoke(
StringHandler.class.getName(), "getBuf",
Type.STRINGBUFFER, Type.NO_ARGS, INVOKEVIRTUAL));
instrList.append(instrFactory.createInvoke(
StringBuffer.class.getName(), "toString",
Type.STRING, Type.NO_ARGS, INVOKEVIRTUAL));
// sax.processingInstruction(
// evalExprAsString(el.getName()),
// _data);
instrList.append(instrFactory.createInvoke(
ContentHandler.class.getName(),
"processingInstruction",
Type.VOID,
new Type[] { Type.STRING, Type.STRING },
INVOKEINTERFACE));
}
private void compileNode(LSPIf el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
LSPExpr expr = el.getTest();
compileExprAsBooleanValue(expr, methodGen, instrList);
// if (evalExprAsBoolean(expr))
BranchInstruction theBranch = instrFactory.createBranchInstruction(
IFEQ, null);
instrList.append(theBranch);
compileNode(el.getBody(), methodGen, instrList, split);
theBranch.setTarget(instrList.append(InstructionConstants.NOP));
}
private void compileNode(LSPChoose el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
InstructionHandle[] testCase = new InstructionHandle[el.getNWhens()];
BranchInstruction[] branch1 = new BranchInstruction[el.getNWhens()];
BranchInstruction[] branch2 = new BranchInstruction[el.getNWhens()];
for (int i = 0; i<el.getNWhens(); i++)
{
LSPExpr expr = el.getWhenTest(i);
testCase[i] = instrList.append(InstructionConstants.NOP);
compileExprAsBooleanValue(expr, methodGen, instrList);
// if (evalExprAsBoolean(expr))
branch1[i] = instrFactory.createBranchInstruction(
IFEQ, null);
instrList.append(branch1[i]);
compileNode(el.getWhenBody(i), methodGen, instrList, split);
branch2[i] = instrFactory.createBranchInstruction(GOTO, null);
instrList.append(branch2[i]);
}
for (int i = 0; i<(branch1.length-1); i++)
{
branch1[i].setTarget(testCase[i+1]);
}
LSPNode otherwise = el.getOtherwise();
if (otherwise != null)
{
branch1[branch1.length-1].setTarget(
instrList.append(InstructionConstants.NOP));
compileNode(otherwise, methodGen, instrList, split);
}
InstructionHandle atEnd = instrList.append(InstructionConstants.NOP);
for (int i = 0; i<branch2.length; i++)
{
branch2[i].setTarget(atEnd);
}
if (otherwise == null)
{
branch1[branch1.length-1].setTarget(atEnd);
}
}
private void compileNode(LSPForEach el,
MethodGen methodGen, InstructionList instrList,
int split)
throws SAXException
{
// final Collection theList = evalExprAsList(el.getList());
compileExprAsList(el.getList(), methodGen, instrList);
// Iterator theIter = theList.listIterator();
instrList.append(instrFactory.createInvoke(
Collection.class.getName(),
"iterator",
Type.getType(Iterator.class),
Type.NO_ARGS,