org.eclipse.jdt.internal.compiler.lookup.VariableBinding.java Source code

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Here is the source code for org.eclipse.jdt.internal.compiler.lookup.VariableBinding.java

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/*******************************************************************************
 * Copyright (c) 2000, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Stephan Herrmann - Contribution for
 *                        bug 331649 - [compiler][null] consider null annotations for fields
 *                        Bug 392099 - [1.8][compiler][null] Apply null annotation on types for null analysis
 *                        Bug 458396 - NPE in CodeStream.invoke()
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.lookup;

import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.impl.Constant;

public abstract class VariableBinding extends Binding {

    public int modifiers;
    public TypeBinding type;
    public char[] name;
    protected Constant constant;
    public int id; // for flow-analysis (position in flowInfo bit vector)
    public long tagBits;

    public VariableBinding(char[] name, TypeBinding type, int modifiers, Constant constant) {
        this.name = name;
        this.type = type;
        this.modifiers = modifiers;
        this.constant = constant;
        if (type != null) {
            this.tagBits |= (type.tagBits & TagBits.HasMissingType);
        }
    }

    public Constant constant() {
        return this.constant;
    }

    /**
     * Call this variant during resolve / analyse, so we can handle the case 
     * when a tentative lambda resolve triggers resolving of outside code.
     */
    public Constant constant(Scope scope) {
        return constant();
    }

    @Override
    public abstract AnnotationBinding[] getAnnotations();

    public final boolean isBlankFinal() {
        return (this.modifiers & ExtraCompilerModifiers.AccBlankFinal) != 0;
    }

    /* Answer true if the receiver is explicitly or implicitly final
     * and cannot be changed. Resources on try and multi catch variables are
     * marked as implicitly final.
    */
    public final boolean isFinal() {
        return (this.modifiers & ClassFileConstants.AccFinal) != 0;
    }

    public final boolean isEffectivelyFinal() {
        return (this.tagBits & TagBits.IsEffectivelyFinal) != 0;
    }

    /** Answer true if null annotations are enabled and this field is specified @NonNull */
    public boolean isNonNull() {
        return (this.tagBits & TagBits.AnnotationNonNull) != 0
                || (this.type != null && (this.type.tagBits & TagBits.AnnotationNonNull) != 0);
    }

    /** Answer true if null annotations are enabled and this field is specified @Nullable */
    public boolean isNullable() {
        return (this.tagBits & TagBits.AnnotationNullable) != 0
                || (this.type != null && (this.type.tagBits & TagBits.AnnotationNullable) != 0);
    }

    @Override
    public char[] readableName() {
        return this.name;
    }

    public void setConstant(Constant constant) {
        this.constant = constant;
    }

    @Override
    public String toString() {
        StringBuffer output = new StringBuffer(10);
        ASTNode.printModifiers(this.modifiers, output);
        if ((this.modifiers & ExtraCompilerModifiers.AccUnresolved) != 0) {
            output.append("[unresolved] "); //$NON-NLS-1$
        }
        output.append(this.type != null ? this.type.debugName() : "<no type>"); //$NON-NLS-1$
        output.append(" "); //$NON-NLS-1$
        output.append((this.name != null) ? new String(this.name) : "<no name>"); //$NON-NLS-1$
        return output.toString();
    }
}