Java ScriptNode类代码示例

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Transforms the tree into a lower-level IR suitable for codegen.
 * Optionally generates the encoded source.
 */
public ScriptNode transformTree(AstRoot root) {
    currentScriptOrFn = root;
    this.inUseStrictDirective = root.isInStrictMode();
    int sourceStartOffset = decompiler.getCurrentOffset();

    if (Token.printTrees) {
        System.out.println("IRFactory.transformTree");
        System.out.println(root.debugPrint());
    }
    ScriptNode script = (ScriptNode)transform(root);

    int sourceEndOffset = decompiler.getCurrentOffset();
    script.setEncodedSourceBounds(sourceStartOffset,
                                  sourceEndOffset);

    if (compilerEnv.isGeneratingSource()) {
        script.setEncodedSource(decompiler.getEncodedSource());
    }

    decompiler = null;
    return script;
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
private void transformCompilationUnit(ScriptNode tree, boolean inStrictMode)
{
    loops = new ObjArray();
    loopEnds = new ObjArray();

    // to save against upchecks if no finally blocks are used.
    hasFinally = false;

    // Flatten all only if we are not using scope objects for block scope
    boolean createScopeObjects = tree.getType() != Token.FUNCTION ||
                              ((FunctionNode)tree).requiresActivation();
    tree.flattenSymbolTable(!createScopeObjects);

    //uncomment to print tree before transformation
    if (Token.printTrees) System.out.println(tree.toStringTree(tree));
    transformCompilationUnit_r(tree, tree, tree, createScopeObjects,
                               inStrictMode);
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
public Object compile(CompilerEnvirons compilerEnv,
                      ScriptNode tree,
                      String encodedSource,
                      boolean returnFunction)
{
    int serial;
    synchronized (globalLock) {
        serial = ++globalSerialClassCounter;
    }

    String baseName = "c";
    if (tree.getSourceName().length() > 0) {
      baseName = tree.getSourceName().replaceAll("\\W", "_");
      if (!Character.isJavaIdentifierStart(baseName.charAt(0))) {
        baseName = "_" + baseName;
      }
    }

    String mainClassName = "org.mozilla.javascript.gen." + baseName + "_" + serial;

    byte[] mainClassBytes = compileToClassFile(compilerEnv, mainClassName,
                                               tree, encodedSource,
                                               returnFunction);

    return new Object[] { mainClassName, mainClassBytes };
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Gets a Java-compatible "informative" name for the the ScriptOrFnNode
 */
String cleanName(final ScriptNode n)
{
  String result = "";
  if (n instanceof FunctionNode) {
    Name name = ((FunctionNode) n).getFunctionName();
    if (name == null) {
      result = "anonymous";
    } else {
      result = name.getIdentifier();
    }
  } else {
    result = "script";
  }
  return result;
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
String getBodyMethodSignature(ScriptNode n)
{
    StringBuilder sb = new StringBuilder();
    sb.append('(');
    sb.append(mainClassSignature);
    sb.append("Lorg/mozilla/javascript/Context;"
              +"Lorg/mozilla/javascript/Scriptable;"
              +"Lorg/mozilla/javascript/Scriptable;");
    if (n.getType() == Token.FUNCTION) {
        OptFunctionNode ofn = OptFunctionNode.get(n);
        if (ofn.isTargetOfDirectCall()) {
            int pCount = ofn.fnode.getParamCount();
            for (int i = 0; i != pCount; i++) {
                sb.append("Ljava/lang/Object;D");
            }
        }
    }
    sb.append("[Ljava/lang/Object;)Ljava/lang/Object;");
    return sb.toString();
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
private void transformCompilationUnit(ScriptNode tree)
{
    loops = new ObjArray();
    loopEnds = new ObjArray();

    // to save against upchecks if no finally blocks are used.
    hasFinally = false;

    // Flatten all only if we are not using scope objects for block scope
    boolean createScopeObjects = tree.getType() != Token.FUNCTION ||
                              ((FunctionNode)tree).requiresActivation();
    tree.flattenSymbolTable(!createScopeObjects);

    //uncomment to print tree before transformation
    if (Token.printTrees) System.out.println(tree.toStringTree(tree));
    boolean inStrictMode = tree instanceof AstRoot &&
                           ((AstRoot)tree).isInStrictMode();
    transformCompilationUnit_r(tree, tree, tree, createScopeObjects,
                               inStrictMode);
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
public Object compile(CompilerEnvirons compilerEnv,
                      ScriptNode tree,
                      String encodedSource,
                      boolean returnFunction)
{
    int serial;
    synchronized (globalLock) {
        serial = ++globalSerialClassCounter;
    }
    
    String baseName = "c";
    if (tree.getSourceName().length() > 0) {
      baseName = tree.getSourceName().replaceAll("\\W", "_");
      if (!Character.isJavaIdentifierStart(baseName.charAt(0))) {
        baseName = "_" + baseName;
      }
    }

    String mainClassName = "org.mozilla.javascript.gen." + baseName + "_" + serial;

    byte[] mainClassBytes = compileToClassFile(compilerEnv, mainClassName,
                                               tree, encodedSource,
                                               returnFunction);

    return new Object[] { mainClassName, mainClassBytes };
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
String getBodyMethodSignature(ScriptNode n)
{
    StringBuffer sb = new StringBuffer();
    sb.append('(');
    sb.append(mainClassSignature);
    sb.append("Lorg/mozilla/javascript/Context;"
              +"Lorg/mozilla/javascript/Scriptable;"
              +"Lorg/mozilla/javascript/Scriptable;");
    if (n.getType() == Token.FUNCTION) {
        OptFunctionNode ofn = OptFunctionNode.get(n);
        if (ofn.isTargetOfDirectCall()) {
            int pCount = ofn.fnode.getParamCount();
            for (int i = 0; i != pCount; i++) {
                sb.append("Ljava/lang/Object;D");
            }
        }
    }
    sb.append("[Ljava/lang/Object;)Ljava/lang/Object;");
    return sb.toString();
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Compiles {@code source} and returns the transformed and optimized
 * {@link ScriptNode}
 */
protected ScriptNode compile(CharSequence source) {
    final String mainMethodClassName = "Main";
    final String scriptClassName = "Main";

    CompilerEnvirons compilerEnv = new CompilerEnvirons();
    compilerEnv.initFromContext(cx);
    Parser p = new Parser(compilerEnv);
    AstRoot ast = p.parse(source.toString(), "<eval>", 1);
    IRFactory irf = new IRFactory(compilerEnv);
    ScriptNode tree = irf.transformTree(ast);

    Codegen codegen = new Codegen();
    codegen.setMainMethodClass(mainMethodClassName);
    codegen.compileToClassFile(compilerEnv, scriptClassName, tree, tree.getEncodedSource(),
            false);

    return tree;
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Checks every variable {@code v} in {@code source} is marked as a
 * number-variable iff {@code numbers} contains {@code v}
 */
protected void assertNumberVars(CharSequence source, String... numbers) {
    // wrap source in function
    ScriptNode tree = compile("function f(){" + source + "}");

    FunctionNode fnode = tree.getFunctionNode(0);
    assertNotNull(fnode);
    OptFunctionNode opt = OptFunctionNode.get(fnode);
    assertNotNull(opt);
    assertSame(fnode, opt.fnode);

    for (int i = 0, c = fnode.getParamCount(); i < c; ++i) {
        assertTrue(opt.isParameter(i));
        assertFalse(opt.isNumberVar(i));
    }

    Set<String> set = new HashSet<String>(asList(numbers));
    for (int i = fnode.getParamCount(), c = fnode.getParamAndVarCount(); i < c; ++i) {
        assertFalse(opt.isParameter(i));
        String name = fnode.getParamOrVarName(i);
        String msg = format("{%s -> number? = %b}", name, opt.isNumberVar(i));
        assertEquals(msg, set.contains(name), opt.isNumberVar(i));
    }
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Compiles {@code source} and returns the transformed and optimized
 * {@link ScriptNode}
 */
protected ScriptNode compile(CharSequence source) {
    final String mainMethodClassName = "Main";
    final String scriptClassName = "Main";

    CompilerEnvirons compilerEnv = new CompilerEnvirons();
    compilerEnv.initFromContext(cx);
    ErrorReporter compilationErrorReporter = compilerEnv
            .getErrorReporter();
    Parser p = new Parser(compilerEnv, compilationErrorReporter);
    AstRoot ast = p.parse(source.toString(), "<eval>", 1);
    IRFactory irf = new IRFactory(compilerEnv);
    ScriptNode tree = irf.transformTree(ast);

    Codegen codegen = new Codegen();
    codegen.setMainMethodClass(mainMethodClassName);
    codegen.compileToClassFile(compilerEnv, scriptClassName, tree,
            tree.getEncodedSource(), false);

    return tree;
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * Checks every variable {@code v} in {@code source} is marked as a
 * number-variable iff {@code numbers} contains {@code v}
 */
protected void assertNumberVars(CharSequence source, String... numbers) {
    // wrap source in function
    ScriptNode tree = compile("function f(o, fn){" + source + "}");

    FunctionNode fnode = tree.getFunctionNode(0);
    assertNotNull(fnode);
    OptFunctionNode opt = OptFunctionNode.get(fnode);
    assertNotNull(opt);
    assertSame(fnode, opt.fnode);

    for (int i = 0, c = fnode.getParamCount(); i < c; ++i) {
        assertTrue(opt.isParameter(i));
        assertFalse(opt.isNumberVar(i));
    }

    Set<String> set = new HashSet<String>(asList(numbers));
    for (int i = fnode.getParamCount(), c = fnode.getParamAndVarCount(); i < c; ++i) {
        assertFalse(opt.isParameter(i));
        String name = fnode.getParamOrVarName(i);
        String msg = format("{%s -> number? = %b}", name, opt.isNumberVar(i));
        assertEquals(msg, set.contains(name), opt.isNumberVar(i));
    }
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * 
 * @param expr
 * @param objectName
 * @return
 */
private static String getReferencedScriptObject( String expr,
		String objectName )
{
	if ( expr == null )
		return null;
	try
	{
		Context cx = Context.enter( );
		CompilerEnvirons ce = new CompilerEnvirons( );
		Parser p = new Parser( ce, cx.getErrorReporter( ) );
		AstRoot tree = p.parse( expr, null, 0 );
		IRFactory ir = new IRFactory( ce );
		ScriptNode script = ir.transformTree( tree );
		return getScriptObjectName( script, objectName );
	}
	finally
	{
		Context.exit( );
	}
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * get the function node index
 * 
 * @param functionName
 * @param tree
 * @return
 */
private int getFunctionIndex( String functionName, ScriptNode tree )
{
	int index = -1;
	for ( int i = 0; i < tree.getFunctionCount( ); i++ )
	{
		if ( tree.getFunctionNode( i )
				.getFunctionName( ).getString()
				.equals( functionName ) )
		{
			index = i;
			break;
		}
	}
	return index;
}
 

import org.mozilla.javascript.ast.ScriptNode; //导入依赖的package包/类
/**
 * compile the string expression
 * 
 * @param expression
 * @param context
 * @return
 * @throws DataException
 */
protected CompiledExpression compileExpression( String expression,
		ScriptContext context ) throws DataException
{
	String exp = "";
	try
	{
		exp = expression;
		if ( exp == null )
			return null;
		
		IDataScriptEngine engine = (IDataScriptEngine) context.getScriptEngine( IDataScriptEngine.ENGINE_NAME );
		
		ScriptNode tree = parse( exp, engine.getJSContext( context ) );
		return processScriptTree( exp, tree, engine.getJSContext( context )  );
	}
	catch ( Exception e )
	{
		DataException dataException = new DataException( ResourceConstants.INVALID_JS_EXPR,
				e,
				exp );
		throw dataException;
	}
}