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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.compiler.problem;
import org.eclipse.wst.jsdt.core.compiler.IProblem;
import org.eclipse.wst.jsdt.internal.compiler.CompilationResult;
import org.eclipse.wst.jsdt.internal.compiler.IErrorHandlingPolicy;
import org.eclipse.wst.jsdt.internal.compiler.IProblemFactory;
import org.eclipse.wst.jsdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.wst.jsdt.internal.compiler.impl.ReferenceContext;
/*
* Compiler error handler, responsible to determine whether
* a problem is actually a warning or an error; also will
* decide whether the compilation task can be processed further or not.
*
* Behavior : will request its current policy if need to stop on
* first error, and if should proceed (persist) with problems.
*/
public class ProblemHandler implements ProblemSeverities {
public final static String[] NoArgument = new String[0];
final public IErrorHandlingPolicy policy;
public final IProblemFactory problemFactory;
public final CompilerOptions options;
/*
* Problem handler can be supplied with a policy to specify
* its behavior in error handling. Also see static methods for
* built-in policies.
*
*/
public ProblemHandler(IErrorHandlingPolicy policy, CompilerOptions options, IProblemFactory problemFactory) {
this.policy = policy;
this.problemFactory = problemFactory;
this.options = options;
}
/*
* Given the current configuration, answers which category the problem
* falls into:
* Error | Warning | Ignore
*/
public int computeSeverity(int problemId){
return Error; // by default all problems are errors
}
public IProblem createProblem(
char[] fileName,
int problemId,
String[] problemArguments,
String[] messageArguments,
int severity,
int problemStartPosition,
int problemEndPosition,
int lineNumber) {
return this.problemFactory.createProblem(
fileName,
problemId,
problemArguments,
messageArguments,
severity,
problemStartPosition,
problemEndPosition,
lineNumber);
}
public void handle(
int problemId,
String[] problemArguments,
String[] messageArguments,
int severity,
int problemStartPosition,
int problemEndPosition,
ReferenceContext referenceContext,
CompilationResult unitResult) {
if (severity == Ignore)
return;
// if no reference context, we need to abort from the current compilation process
if (referenceContext == null) {
if ((severity & Error) != 0) { // non reportable error is fatal
IProblem problem = this.createProblem(null, problemId, problemArguments, messageArguments, severity, 0, 0, 0);
throw new AbortCompilation(null, problem);
} else {
return; // ignore non reportable warning
}
}
IProblem problem =
this.createProblem(
unitResult.getFileName(),
problemId,
problemArguments,
messageArguments,
severity,
problemStartPosition,
problemEndPosition,
problemStartPosition >= 0
? searchLineNumber(unitResult.lineSeparatorPositions, problemStartPosition)
: 0);
if (problem == null) return; // problem couldn't be created, ignore
switch (severity & Error) {
case Error :
this.record(problem, unitResult, referenceContext);
referenceContext.tagAsHavingErrors();
// should abort ?
int abortLevel;
if ((abortLevel =
(this.policy.stopOnFirstError() ? AbortCompilation : severity & Abort)) != 0) {
referenceContext.abort(abortLevel, problem);
}
break;
case Warning :
this.record(problem, unitResult, referenceContext);
break;
}
}
/**
* Standard problem handling API, the actual severity (warning/error/ignore) is deducted
* from the problem ID and the current compiler options.
*/
public void handle(
int problemId,
String[] problemArguments,
String[] messageArguments,
int problemStartPosition,
int problemEndPosition,
ReferenceContext referenceContext,
CompilationResult unitResult) {
this.handle(
problemId,
problemArguments,
messageArguments,
this.computeSeverity(problemId), // severity inferred using the ID
problemStartPosition,
problemEndPosition,
referenceContext,
unitResult);
}
public void record(IProblem problem, CompilationResult unitResult, ReferenceContext referenceContext) {
unitResult.record(problem, referenceContext);
}
/**
* Search the line number corresponding to a specific position
*/
public static final int searchLineNumber(int[] startLineIndexes, int position) {
if (startLineIndexes == null)
return 1;
int length = startLineIndexes.length;
if (length == 0)
return 1;
int g = 0, d = length - 1;
int m = 0;
while (g <= d) {
m = (g + d) /2;
if (position < startLineIndexes[m]) {
d = m-1;
} else if (position > startLineIndexes[m]) {
g = m+1;
} else {
return m + 1;
}
}
if (position < startLineIndexes[m]) {
return m+1;
}
return m+2;
}
}
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