Java LineNumber类代码示例

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * Create message for storage at message key. The message includes the
 * provided message, the method name and, if obtainable, the line number.
 */
private String createMessage(Method method, String message) {
	StringBuilder result = new StringBuilder();

	result.append(method.getName());
	LineNumberTable table = method.getLineNumberTable();

	if (table != null) {
		LineNumber[] lineNumbers = table.getLineNumberTable();
		LineNumber linenumber = lineNumbers[0];
		int number = linenumber.getLineNumber();
		result.append(" [" + number + "]");
	}

	result.append(": ");
	result.append(message);

	return result.toString();
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * @param className
 * @return
 */
static SourceLineAnnotation getSourceAnnotationForClass(String className, String sourceFileName) {

    int lastLine = -1;
    int firstLine = Integer.MAX_VALUE;

    try {
        JavaClass targetClass = AnalysisContext.currentAnalysisContext().lookupClass(className);
        for (Method m : targetClass.getMethods()) {
            Code c = m.getCode();
            if (c != null) {
                LineNumberTable table = c.getLineNumberTable();
                if (table != null)
                    for (LineNumber line : table.getLineNumberTable()) {
                        lastLine = Math.max(lastLine, line.getLineNumber());
                        firstLine = Math.min(firstLine, line.getLineNumber());
                    }
            }
        }
    } catch (ClassNotFoundException e) {
        AnalysisContext.reportMissingClass(e);
    }
    if (firstLine < Integer.MAX_VALUE)
        return new SourceLineAnnotation(className, sourceFileName, firstLine, lastLine, -1, -1);
    return SourceLineAnnotation.createUnknown(className, sourceFileName);
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
private void foundSwitchNoDefault(SourceLineAnnotation s) {
    LineNumberTable table = getCode().getLineNumberTable();

    if (table != null) {
        int startLine = s.getStartLine();
        int prev = Integer.MIN_VALUE;
        for (LineNumber ln : table.getLineNumberTable()) {
            int thisLineNumber = ln.getLineNumber();
            if (thisLineNumber < startLine && thisLineNumber > prev && ln.getStartPC() < s.getStartBytecode())
                prev = thisLineNumber;
        }
        int diff = startLine - prev;
        if (diff > 5)
            return;

        bugAccumulator.accumulateBug(new BugInstance(this, "SF_SWITCH_NO_DEFAULT", NORMAL_PRIORITY).addClassAndMethod(this),
                s);
    }

}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
private static SourceLineAnnotation forEntireMethod(String className, String sourceFile,
                                                    LineNumberTable lineNumberTable, int codeSize) {
	LineNumber[] table = lineNumberTable.getLineNumberTable();
	if (table != null && table.length > 0) {
		LineNumber first = table[0];
		LineNumber last = table[table.length - 1];
		return new SourceLineAnnotation(className, sourceFile, first.getLineNumber(), last.getLineNumber(),
		        0, codeSize - 1);
	} else {
		return createUnknown(className, sourceFile, 0, codeSize - 1);
	}
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
private void checkTable(LineNumberTable table) {
	if (DEBUG) System.out.println("line number table has length " + table.getTableLength());
	LineNumber[] entries = table.getLineNumberTable();
	int lastBytecode = -1;
	for (int i = 0; i < entries.length; ++i) {
		LineNumber ln = entries[i];
		if (DEBUG) System.out.println("Entry " + i + ": pc=" + ln.getStartPC() + ", line=" + ln.getLineNumber());
		int pc = ln.getStartPC();
		if (pc <= lastBytecode) throw new IllegalStateException("LineNumberTable is not sorted");
	}
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
@Override
public void visitLineNumberTable(LineNumberTable obj) {
    super.visitLineNumberTable(obj);
    LineNumber[] line_number_table = obj.getLineNumberTable();
    for (LineNumber aLine_number_table : line_number_table)
        aLine_number_table.accept(this);
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * Make a best-effort attempt to create a SourceLineAnnotation for the first
 * line of a method.
 *
 * @param methodDescriptor
 *            a method
 * @return SourceLineAnnotation describing the first line of the method
 *         (insofar as we can actually figure that out from the bytecode)
 */
public static SourceLineAnnotation forFirstLineOfMethod(MethodDescriptor methodDescriptor) {
    SourceLineAnnotation result = null;

    try {
        Method m = Global.getAnalysisCache().getMethodAnalysis(Method.class, methodDescriptor);
        XClass xclass = Global.getAnalysisCache().getClassAnalysis(XClass.class, methodDescriptor.getClassDescriptor());
        LineNumberTable lnt = m.getLineNumberTable();
        String sourceFile = xclass.getSource();
        if (sourceFile != null && lnt != null) {
            int firstLine = Integer.MAX_VALUE;
            int bytecode = 0;
            LineNumber[] entries = lnt.getLineNumberTable();
            for (LineNumber entry : entries) {
                if (entry.getLineNumber() < firstLine) {
                    firstLine = entry.getLineNumber();
                    bytecode = entry.getStartPC();
                }
            }
            if (firstLine < Integer.MAX_VALUE) {

                result = new SourceLineAnnotation(methodDescriptor.getClassDescriptor().toDottedClassName(), sourceFile,
                        firstLine, firstLine, bytecode, bytecode);
            }
        }
    } catch (CheckedAnalysisException e) {
        // ignore
    }

    if (result == null) {
        result = createUnknown(methodDescriptor.getClassDescriptor().toDottedClassName());
    }
    return result;
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
public static int getNextSourceLine(LineNumberTable lineNumbers, int sourceLine) {
    int result = Integer.MAX_VALUE;
    for (LineNumber ln : lineNumbers.getLineNumberTable()) {

        int thisLine = ln.getLineNumber();
        if (sourceLine < thisLine && thisLine < result)
            result = thisLine;
    }
    return result;

}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
private void checkTable(LineNumberTable table) {
    if (DEBUG)
        System.out.println("line number table has length " + table.getTableLength());
    LineNumber[] entries = table.getLineNumberTable();
    int lastBytecode = -1;
    for (int i = 0; i < entries.length; ++i) {
        LineNumber ln = entries[i];
        if (DEBUG)
            System.out.println("Entry " + i + ": pc=" + ln.getStartPC() + ", line=" + ln.getLineNumber());
        int pc = ln.getStartPC();
        if (pc <= lastBytecode)
            throw new IllegalStateException("LineNumberTable is not sorted");
    }
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * @return `LineNumberTable' attribute of all the local variables of this method.
 */
public LineNumberTable getLineNumberTable( ConstantPoolGen cp ) {
    int size = line_number_vec.size();
    LineNumber[] ln = new LineNumber[size];
    try {
        for (int i = 0; i < size; i++) {
            ln[i] = ((LineNumberGen) line_number_vec.get(i)).getLineNumber();
        }
    } catch (ArrayIndexOutOfBoundsException e) {
    } // Never occurs
    return new LineNumberTable(cp.addUtf8("LineNumberTable"), 2 + ln.length * 4, ln, cp
            .getConstantPool());
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * Constructor.
 *
 * @param methodGen the method to summarize line numbers for
 */
public LineNumberMap(MethodGen methodGen) {
	this.methodGen = methodGen;
	lineNumberMap = new IdentityHashMap<InstructionHandle, LineNumber>();
	hasLineNumbers = false;
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
/**
 * Build the line number information.
 * Should be called before any other methods.
 */
public void build() {
	int numGood = 0, numBytecodes = 0;

	if (DEBUG) {
		System.out.println("Method: " + methodGen.getName() + " - " + methodGen.getSignature() +
		        "in class " + methodGen.getClassName());
	}

	// Associate line number information with each InstructionHandle
	LineNumberTable table = methodGen.getLineNumberTable(methodGen.getConstantPool());

	if (table != null && table.getTableLength() > 0) {
		checkTable(table);
		InstructionHandle handle = methodGen.getInstructionList().getStart();
		while (handle != null) {
			int bytecodeOffset = handle.getPosition();
			if (bytecodeOffset < 0)
				throw new IllegalStateException("Bad bytecode offset: " + bytecodeOffset);
			if (DEBUG) System.out.println("Looking for source line for bytecode offset " + bytecodeOffset);
			int sourceLine;
			try {
				sourceLine = table.getSourceLine(bytecodeOffset);
			} catch (ArrayIndexOutOfBoundsException e) {
				if (LINE_NUMBER_BUG)
					throw e;
				else
					sourceLine = -1;
			}
			if (sourceLine >= 0)
				++numGood;
			lineNumberMap.put(handle,
			        new LineNumber(bytecodeOffset, sourceLine));
			handle = handle.getNext();
			++numBytecodes;
		}
		hasLineNumbers = true;

		if (DEBUG) System.out.println("\t" + numGood + "/" + numBytecodes + " had valid line numbers");
	}
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
@Override
public void visitLineNumber(LineNumber obj) {
	if (obj.getLineNumber() > this.jClass.getLineCount()) {
		this.jClass.setLineCount(obj.getLineNumber());
	}
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
public void visit(LineNumber obj) {
}
 

import org.apache.bcel.classfile.LineNumber; //导入依赖的package包/类
public void visitLineNumber(LineNumber obj) {
    visit(obj);
}