Java EqualExpression类代码示例

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
public IfStatement generateCompareFloatOrDouble(Expression thisRef, Expression otherRef, char[] floatOrDouble, ASTNode source) {
	int pS = source.sourceStart, pE = source.sourceEnd;
	/* if (Float.compare(fieldName, other.fieldName) != 0) return false */
	MessageSend floatCompare = new MessageSend();
	floatCompare.sourceStart = pS; floatCompare.sourceEnd = pE;
	setGeneratedBy(floatCompare, source);
	floatCompare.receiver = generateQualifiedNameRef(source, TypeConstants.JAVA, TypeConstants.LANG, floatOrDouble);
	floatCompare.selector = "compare".toCharArray();
	floatCompare.arguments = new Expression[] {thisRef, otherRef};
	IntLiteral int0 = makeIntLiteral("0".toCharArray(), source);
	EqualExpression ifFloatCompareIsNot0 = new EqualExpression(floatCompare, int0, OperatorIds.NOT_EQUAL);
	ifFloatCompareIsNot0.sourceStart = pS; ifFloatCompareIsNot0.sourceEnd = pE;
	setGeneratedBy(ifFloatCompareIsNot0, source);
	FalseLiteral falseLiteral = new FalseLiteral(pS, pE);
	setGeneratedBy(falseLiteral, source);
	ReturnStatement returnFalse = new ReturnStatement(falseLiteral, pS, pE);
	setGeneratedBy(returnFalse, source);
	IfStatement ifStatement = new IfStatement(ifFloatCompareIsNot0, returnFalse, pS, pE);
	setGeneratedBy(ifStatement, source);
	return ifStatement;
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
/** Generates 'this.<em>name</em>.size()' as an expression; if nullGuard is true, it's this.name == null ? 0 : this.name.size(). */
protected Expression getSize(EclipseNode builderType, char[] name, boolean nullGuard) {
	MessageSend invoke = new MessageSend();
	ThisReference thisRef = new ThisReference(0, 0);
	FieldReference thisDotName = new FieldReference(name, 0L);
	thisDotName.receiver = thisRef;
	invoke.receiver = thisDotName;
	invoke.selector = SIZE_TEXT;
	if (!nullGuard) return invoke;
	
	ThisReference cdnThisRef = new ThisReference(0, 0);
	FieldReference cdnThisDotName = new FieldReference(name, 0L);
	cdnThisDotName.receiver = cdnThisRef;
	NullLiteral nullLiteral = new NullLiteral(0, 0);
	EqualExpression isNull = new EqualExpression(cdnThisDotName, nullLiteral, OperatorIds.EQUAL_EQUAL);
	IntLiteral zeroLiteral = makeIntLiteral(new char[] {'0'}, null);
	ConditionalExpression conditional = new ConditionalExpression(isNull, zeroLiteral, invoke);
	return conditional;
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
public char[] returnVarNameIfNullCheck(Statement stat) {
	if (!(stat instanceof IfStatement)) return null;
	
	/* Check that the if's statement is a throw statement, possibly in a block. */ {
		Statement then = ((IfStatement) stat).thenStatement;
		if (then instanceof Block) {
			Statement[] blockStatements = ((Block) then).statements;
			if (blockStatements == null || blockStatements.length == 0) return null;
			then = blockStatements[0];
		}
		
		if (!(then instanceof ThrowStatement)) return null;
	}
	
	/* Check that the if's conditional is like 'x == null'. Return from this method (don't generate
	   a nullcheck) if 'x' is equal to our own variable's name: There's already a nullcheck here. */ {
		Expression cond = ((IfStatement) stat).condition;
		if (!(cond instanceof EqualExpression)) return null;
		EqualExpression bin = (EqualExpression) cond;
		int operatorId = ((bin.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT);
		if (operatorId != OperatorIds.EQUAL_EQUAL) return null;
		if (!(bin.left instanceof SingleNameReference)) return null;
		if (!(bin.right instanceof NullLiteral)) return null;
		return ((SingleNameReference) bin.left).token;
	}
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
private void generateClearMethod(TypeReference returnType, Statement returnStatement, SingularData data, EclipseNode builderType) {
	MethodDeclaration md = new MethodDeclaration(((CompilationUnitDeclaration) builderType.top().get()).compilationResult);
	md.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
	md.modifiers = ClassFileConstants.AccPublic;
	
	FieldReference thisDotField = new FieldReference(data.getPluralName(), 0L);
	thisDotField.receiver = new ThisReference(0, 0);
	FieldReference thisDotField2 = new FieldReference(data.getPluralName(), 0L);
	thisDotField2.receiver = new ThisReference(0, 0);
	md.selector = HandlerUtil.buildAccessorName("clear", new String(data.getPluralName())).toCharArray();
	MessageSend clearMsg = new MessageSend();
	clearMsg.receiver = thisDotField2;
	clearMsg.selector = "clear".toCharArray();
	Statement clearStatement = new IfStatement(new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.NOT_EQUAL), clearMsg, 0, 0);
	md.statements = returnStatement != null ? new Statement[] {clearStatement, returnStatement} : new Statement[] {clearStatement};
	md.returnType = returnType;
	injectMethod(builderType, md);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
public void notCompatibleTypesError(EqualExpression expression, TypeBinding leftType, TypeBinding rightType) {
	String leftName = new String(leftType.readableName());
	String rightName = new String(rightType.readableName());
	String leftShortName = new String(leftType.shortReadableName());
	String rightShortName = new String(rightType.shortReadableName());
	if (leftShortName.equals(rightShortName)){
		leftShortName = leftName;
		rightShortName = rightName;
	}
	this.handle(
		IProblem.IncompatibleTypesInEqualityOperator,
		new String[] {leftName, rightName },
		new String[] {leftShortName, rightShortName },
		expression.sourceStart,
		expression.sourceEnd);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
@Override
public void endVisit(EqualExpression x, BlockScope scope) {
  JBinaryOperator op;
  switch ((x.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT) {
    case OperatorIds.EQUAL_EQUAL:
      op = JBinaryOperator.EQ;
      break;
    case OperatorIds.NOT_EQUAL:
      op = JBinaryOperator.NEQ;
      break;
    default:
      throw translateException(x, new InternalCompilerException(
          "Unexpected operator for EqualExpression"));
  }
  pushBinaryOp(x, op);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
/**
 * Generates a new statement that checks if the given variable is null, and if so, throws a {@code NullPointerException} with the
 * variable name as message.
 */
public static Statement generateNullCheck(AbstractVariableDeclaration variable, ASTNode source) {
	int pS = source.sourceStart, pE = source.sourceEnd;
	long p = (long)pS << 32 | pE;
	
	if (isPrimitive(variable.type)) return null;
	AllocationExpression exception = new AllocationExpression();
	setGeneratedBy(exception, source);
	exception.type = new QualifiedTypeReference(fromQualifiedName("java.lang.NullPointerException"), new long[]{p, p, p});
	setGeneratedBy(exception.type, source);
	exception.arguments = new Expression[] { new StringLiteral(variable.name, pS, pE, 0)};
	setGeneratedBy(exception.arguments[0], source);
	ThrowStatement throwStatement = new ThrowStatement(exception, pS, pE);
	setGeneratedBy(throwStatement, source);
	
	SingleNameReference varName = new SingleNameReference(variable.name, p);
	setGeneratedBy(varName, source);
	NullLiteral nullLiteral = new NullLiteral(pS, pE);
	setGeneratedBy(nullLiteral, source);
	EqualExpression equalExpression = new EqualExpression(varName, nullLiteral, OperatorIds.EQUAL_EQUAL);
	equalExpression.sourceStart = pS; equalExpression.statementEnd = equalExpression.sourceEnd = pE;
	setGeneratedBy(equalExpression, source);
	IfStatement ifStatement = new IfStatement(equalExpression, throwStatement, 0, 0);
	setGeneratedBy(ifStatement, source);
	return ifStatement;
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
private IfStatement generateCompareFloatOrDouble(Expression thisRef, Expression otherRef, char[] floatOrDouble, ASTNode source) {
	int pS = source.sourceStart, pE = source.sourceEnd;
	/* if (Float.compare(fieldName, other.fieldName) != 0) return false */
	MessageSend floatCompare = new MessageSend();
	floatCompare.sourceStart = pS; floatCompare.sourceEnd = pE;
	setGeneratedBy(floatCompare, source);
	floatCompare.receiver = generateQualifiedNameRef(source, TypeConstants.JAVA, TypeConstants.LANG, floatOrDouble);
	floatCompare.selector = "compare".toCharArray();
	floatCompare.arguments = new Expression[] {thisRef, otherRef};
	IntLiteral int0 = makeIntLiteral("0".toCharArray(), source);
	EqualExpression ifFloatCompareIsNot0 = new EqualExpression(floatCompare, int0, OperatorIds.NOT_EQUAL);
	ifFloatCompareIsNot0.sourceStart = pS; ifFloatCompareIsNot0.sourceEnd = pE;
	setGeneratedBy(ifFloatCompareIsNot0, source);
	FalseLiteral falseLiteral = new FalseLiteral(pS, pE);
	setGeneratedBy(falseLiteral, source);
	ReturnStatement returnFalse = new ReturnStatement(falseLiteral, pS, pE);
	setGeneratedBy(returnFalse, source);
	IfStatement ifStatement = new IfStatement(ifFloatCompareIsNot0, returnFalse, pS, pE);
	setGeneratedBy(ifStatement, source);
	return ifStatement;
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
protected Statement createConstructBuilderVarIfNeeded(SingularData data, EclipseNode builderType) {
	FieldReference thisDotField = new FieldReference(data.getPluralName(), 0L);
	thisDotField.receiver = new ThisReference(0, 0);
	FieldReference thisDotField2 = new FieldReference(data.getPluralName(), 0L);
	thisDotField2.receiver = new ThisReference(0, 0);
	Expression cond = new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.EQUAL_EQUAL);
	
	MessageSend createBuilderInvoke = new MessageSend();
	char[][] tokenizedName = makeGuavaTypeName(getSimpleTargetTypeName(data), false);
	createBuilderInvoke.receiver = new QualifiedNameReference(tokenizedName, NULL_POSS, 0, 0);
	createBuilderInvoke.selector = getBuilderMethodName(data);
	return new IfStatement(cond, new Assignment(thisDotField2, createBuilderInvoke, 0), 0, 0);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
private void generateClearMethod(TypeReference returnType, Statement returnStatement, SingularData data, EclipseNode builderType) {
	MethodDeclaration md = new MethodDeclaration(((CompilationUnitDeclaration) builderType.top().get()).compilationResult);
	md.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
	md.modifiers = ClassFileConstants.AccPublic;
	
	String pN = new String(data.getPluralName());
	char[] keyFieldName = (pN + "$key").toCharArray();
	char[] valueFieldName = (pN + "$value").toCharArray();
	
	FieldReference thisDotField = new FieldReference(keyFieldName, 0L);
	thisDotField.receiver = new ThisReference(0, 0);
	FieldReference thisDotField2 = new FieldReference(keyFieldName, 0L);
	thisDotField2.receiver = new ThisReference(0, 0);
	FieldReference thisDotField3 = new FieldReference(valueFieldName, 0L);
	thisDotField3.receiver = new ThisReference(0, 0);
	md.selector = HandlerUtil.buildAccessorName("clear", new String(data.getPluralName())).toCharArray();
	MessageSend clearMsg1 = new MessageSend();
	clearMsg1.receiver = thisDotField2;
	clearMsg1.selector = "clear".toCharArray();
	MessageSend clearMsg2 = new MessageSend();
	clearMsg2.receiver = thisDotField3;
	clearMsg2.selector = "clear".toCharArray();
	Block clearMsgs = new Block(2);
	clearMsgs.statements = new Statement[] {clearMsg1, clearMsg2};
	Statement clearStatement = new IfStatement(new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.NOT_EQUAL), clearMsgs, 0, 0);
	md.statements = returnStatement != null ? new Statement[] {clearStatement, returnStatement} : new Statement[] {clearStatement};
	md.returnType = returnType;
	injectMethod(builderType, md);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
/**
 * @see org.eclipse.jdt.internal.compiler.ASTVisitor#visit(org.eclipse.jdt.internal.compiler.ast.EqualExpression, org.eclipse.jdt.internal.compiler.lookup.BlockScope)
 */
public boolean visit(EqualExpression equalExpression, BlockScope scope) {

	if ((equalExpression.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT == OperatorIds.EQUAL_EQUAL) {
		return dumpEqualityExpression(equalExpression, TerminalTokens.TokenNameEQUAL_EQUAL, scope);
	} else {
		return dumpEqualityExpression(equalExpression, TerminalTokens.TokenNameNOT_EQUAL, scope);
	}
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
protected void consumeEqualityExpression(int op) {
	// EqualityExpression ::= EqualityExpression '==' RelationalExpression
	// EqualityExpression ::= EqualityExpression '!=' RelationalExpression

	//optimize the push/pop

	this.expressionPtr--;
	this.expressionLengthPtr--;
	this.expressionStack[this.expressionPtr] =
		new EqualExpression(
			this.expressionStack[this.expressionPtr],
			this.expressionStack[this.expressionPtr + 1],
			op);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
protected void consumeEqualityExpressionWithName(int op) {
	// EqualityExpression ::= Name '==' RelationalExpression
	// EqualityExpression ::= Name '!=' RelationalExpression
	pushOnExpressionStack(getUnspecifiedReferenceOptimized());
	this.expressionPtr--;
	this.expressionLengthPtr--;
	this.expressionStack[this.expressionPtr] =
		new EqualExpression(
			this.expressionStack[this.expressionPtr + 1],
			this.expressionStack[this.expressionPtr],
			op);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
public void uninternedIdentityComparison(EqualExpression expr, TypeBinding lhs, TypeBinding rhs, CompilationUnitDeclaration unit) {
	
	char [] lhsName = lhs.sourceName();
	char [] rhsName = rhs.sourceName();
	
	if (CharOperation.equals(lhsName, "VoidTypeBinding".toCharArray())  //$NON-NLS-1$
			|| CharOperation.equals(lhsName, "NullTypeBinding".toCharArray())  //$NON-NLS-1$
			|| CharOperation.equals(lhsName, "ProblemReferenceBinding".toCharArray())) //$NON-NLS-1$
		return;
	
	if (CharOperation.equals(rhsName, "VoidTypeBinding".toCharArray())  //$NON-NLS-1$
			|| CharOperation.equals(rhsName, "NullTypeBinding".toCharArray())  //$NON-NLS-1$
			|| CharOperation.equals(rhsName, "ProblemReferenceBinding".toCharArray())) //$NON-NLS-1$
		return;
	
	boolean[] validIdentityComparisonLines = unit.validIdentityComparisonLines;
	if (validIdentityComparisonLines != null) {
		int problemStartPosition = expr.left.sourceStart;
		int[] lineEnds;
		int lineNumber = problemStartPosition >= 0
				? Util.getLineNumber(problemStartPosition, lineEnds = unit.compilationResult().getLineSeparatorPositions(), 0, lineEnds.length-1)
						: 0;
		if (lineNumber <= validIdentityComparisonLines.length && validIdentityComparisonLines[lineNumber - 1])
			return;
	}
	
	this.handle(
			IProblem.UninternedIdentityComparison,
			new String[] {
					new String(lhs.readableName()),
					new String(rhs.readableName())
			},
			new String[] {
					new String(lhs.shortReadableName()),
					new String(rhs.shortReadableName())
			},
			expr.sourceStart,
			expr.sourceEnd);
}
 

import org.eclipse.jdt.internal.compiler.ast.EqualExpression; //导入依赖的package包/类
/**
 * Generates a new statement that checks if the given variable is null, and if so, throws a specified exception with the
 * variable name as message.
 * 
 * @param exName The name of the exception to throw; normally {@code java.lang.NullPointerException}.
 */
public static Statement generateNullCheck(AbstractVariableDeclaration variable, EclipseNode sourceNode) {
	NullCheckExceptionType exceptionType = sourceNode.getAst().readConfiguration(ConfigurationKeys.NON_NULL_EXCEPTION_TYPE);
	if (exceptionType == null) exceptionType = NullCheckExceptionType.NULL_POINTER_EXCEPTION;
	
	ASTNode source = sourceNode.get();
	
	int pS = source.sourceStart, pE = source.sourceEnd;
	long p = (long)pS << 32 | pE;
	
	if (isPrimitive(variable.type)) return null;
	AllocationExpression exception = new AllocationExpression();
	setGeneratedBy(exception, source);
	int partCount = 1;
	String exceptionTypeStr = exceptionType.getExceptionType();
	for (int i = 0; i < exceptionTypeStr.length(); i++) if (exceptionTypeStr.charAt(i) == '.') partCount++;
	long[] ps = new long[partCount];
	Arrays.fill(ps, 0L);
	exception.type = new QualifiedTypeReference(fromQualifiedName(exceptionTypeStr), ps);
	setGeneratedBy(exception.type, source);
	exception.arguments = new Expression[] {
			new StringLiteral(exceptionType.toExceptionMessage(new String(variable.name)).toCharArray(), pS, pE, 0)
	};
	setGeneratedBy(exception.arguments[0], source);
	ThrowStatement throwStatement = new ThrowStatement(exception, pS, pE);
	setGeneratedBy(throwStatement, source);
	
	SingleNameReference varName = new SingleNameReference(variable.name, p);
	setGeneratedBy(varName, source);
	NullLiteral nullLiteral = new NullLiteral(pS, pE);
	setGeneratedBy(nullLiteral, source);
	EqualExpression equalExpression = new EqualExpression(varName, nullLiteral, OperatorIds.EQUAL_EQUAL);
	equalExpression.sourceStart = pS; equalExpression.statementEnd = equalExpression.sourceEnd = pE;
	setGeneratedBy(equalExpression, source);
	Block throwBlock = new Block(0);
	throwBlock.statements = new Statement[] {throwStatement};
	throwBlock.sourceStart = pS; throwBlock.sourceEnd = pE;
	setGeneratedBy(throwBlock, source);
	IfStatement ifStatement = new IfStatement(equalExpression, throwBlock, 0, 0);
	setGeneratedBy(ifStatement, source);
	return ifStatement;
}