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/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2003-2007 University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.classfile.analysis;
import java.lang.annotation.ElementType;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.CheckForNull;
import org.apache.bcel.Constants;
import org.objectweb.asm.Opcodes;
import edu.umd.cs.findbugs.ba.ComparableField;
import edu.umd.cs.findbugs.ba.SignatureParser;
import edu.umd.cs.findbugs.ba.XClass;
import edu.umd.cs.findbugs.ba.XFactory;
import edu.umd.cs.findbugs.ba.XField;
import edu.umd.cs.findbugs.ba.jsr305.TypeQualifierApplications;
import edu.umd.cs.findbugs.classfile.CheckedAnalysisException;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.DescriptorFactory;
import edu.umd.cs.findbugs.classfile.FieldDescriptor;
import edu.umd.cs.findbugs.classfile.FieldOrMethodDescriptor;
import edu.umd.cs.findbugs.classfile.Global;
import edu.umd.cs.findbugs.internalAnnotations.DottedClassName;
import edu.umd.cs.findbugs.internalAnnotations.SlashedClassName;
import edu.umd.cs.findbugs.util.ClassName;
import edu.umd.cs.findbugs.util.Util;
/**
* @author pugh
*/
public class FieldInfo extends FieldDescriptor implements XField {
public static final FieldInfo[] EMPTY_ARRAY = new FieldInfo[0];
static public class Builder {
final int accessFlags;
final String className, fieldName, fieldSignature;
String fieldSourceSignature;
final Map fieldAnnotations = new HashMap(3);
public Builder(@SlashedClassName String className, String fieldName, String fieldSignature, int accessFlags) {
this.className = className;
this.fieldName = fieldName;
this.fieldSignature = fieldSignature;
this.accessFlags = accessFlags;
}
public void setSourceSignature(String fieldSourceSignature) {
this.fieldSourceSignature = fieldSourceSignature;
}
public void addAnnotation(String name, AnnotationValue value) {
ClassDescriptor annotationClass = DescriptorFactory.createClassDescriptorFromSignature(name);
fieldAnnotations.put(annotationClass, value);
}
public FieldInfo build() {
return new FieldInfo(className, fieldName, fieldSignature, fieldSourceSignature, accessFlags, fieldAnnotations, true);
}
}
final int accessFlags;
final @CheckForNull
String fieldSourceSignature;
Map fieldAnnotations;
final boolean isResolved;
private FieldInfo(@SlashedClassName String className, String fieldName, String fieldSignature,
@CheckForNull String fieldSourceSignature, int accessFlags, Map fieldAnnotations,
boolean isResolved) {
super(className, fieldName, fieldSignature, (accessFlags & Constants.ACC_STATIC) != 0);
this.accessFlags = accessFlags | (fieldName.startsWith("this$") ? Constants.ACC_FINAL : 0);
this.fieldSourceSignature = fieldSourceSignature;
this.fieldAnnotations = Util.immutableMap(fieldAnnotations);
this.isResolved = isResolved;
}
public int getNumParams() {
return new SignatureParser(getSignature()).getNumParameters();
}
private boolean checkFlag(int flag) {
return (accessFlags & flag) != 0;
}
public boolean isNative() {
return checkFlag(Constants.ACC_NATIVE);
}
public boolean isSynchronized() {
return checkFlag(Constants.ACC_SYNCHRONIZED);
}
@Override
public boolean isDeprecated() {
return checkFlag(Opcodes.ACC_DEPRECATED);
}
@Override
public @DottedClassName
String getClassName() {
return getClassDescriptor().toDottedClassName();
}
@Override
public @DottedClassName
String getPackageName() {
return getClassDescriptor().getPackageName();
}
@Override
public String getSourceSignature() {
return fieldSourceSignature;
}
/*
* (non-Javadoc)
*
* @see java.lang.Comparable#compareTo(java.lang.Object)
*/
@Override
public int compareTo(ComparableField rhs) {
if (rhs instanceof FieldDescriptor) {
return FieldOrMethodDescriptor.compareTo(this, (FieldDescriptor) rhs);
}
if (rhs instanceof XField) {
return XFactory.compare((XField) this, (XField) rhs);
}
throw new ClassCastException("Can't compare a " + this.getClass().getName() + " to a " + rhs.getClass().getName());
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#getAccessFlags()
*/
@Override
public int getAccessFlags() {
return accessFlags;
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#isFinal()
*/
@Override
public boolean isFinal() {
return checkFlag(Constants.ACC_FINAL);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#isPrivate()
*/
@Override
public boolean isPrivate() {
return checkFlag(Constants.ACC_PRIVATE);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#isProtected()
*/
@Override
public boolean isProtected() {
return checkFlag(Constants.ACC_PROTECTED);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#isPublic()
*/
@Override
public boolean isPublic() {
return checkFlag(Constants.ACC_PUBLIC);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.AccessibleEntity#isResolved()
*/
@Override
public boolean isResolved() {
return this.isResolved;
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.XField#isReferenceType()
*/
@Override
public boolean isReferenceType() {
return getSignature().startsWith("L") || getSignature().startsWith("[");
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.XField#isVolatile()
*/
@Override
public boolean isVolatile() {
return checkFlag(Constants.ACC_VOLATILE);
}
@Override
public boolean isSynthetic() {
return checkFlag(Constants.ACC_SYNTHETIC);
}
@Override
public Collection getAnnotationDescriptors() {
return fieldAnnotations.keySet();
}
@Override
public AnnotationValue getAnnotation(ClassDescriptor desc) {
return fieldAnnotations.get(desc);
}
@Override
public Collection getAnnotations() {
return fieldAnnotations.values();
}
/**
* Destructively add an annotation. We do this for "built-in" annotations
* that might not be directly evident in the code. It's not a great idea in
* general, but we can get away with it as long as it's done early enough
* (i.e., before anyone asks what annotations this field has.)
*
* @param annotationValue
* an AnnotationValue representing a field annotation
*/
public void addAnnotation(AnnotationValue annotationValue) {
HashMap updatedAnnotations = new HashMap(
fieldAnnotations);
updatedAnnotations.put(annotationValue.getAnnotationClass(), annotationValue);
fieldAnnotations = updatedAnnotations;
TypeQualifierApplications.updateAnnotations(this);
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.ba.XField#getFieldDescriptor()
*/
@Override
public FieldDescriptor getFieldDescriptor() {
return this;
}
/**
* Create a FieldInfo object to represent an unresolved field.
* Don't call this directly - use XFactory instead.
*
* @param className
* name of class containing the field
* @param name
* name of field
* @param signature
* field signature
* @param isStatic
* true if field is static, false otherwise
* @return FieldInfo object representing the unresolved field
*/
public static FieldInfo createUnresolvedFieldInfo(String className, String name, String signature, boolean isStatic) {
className = ClassName.toSlashedClassName(className);
return new FieldInfo(className, name, signature, null, // without seeing
// the definition
// we don't know
// if it has a
// generic type
isStatic ? Constants.ACC_STATIC : 0, new HashMap(), false);
}
@Override
public ElementType getElementType() {
return ElementType.FIELD;
}
@Override
public @CheckForNull
AnnotatedObject getContainingScope() {
try {
return Global.getAnalysisCache().getClassAnalysis(XClass.class, getClassDescriptor());
} catch (CheckedAnalysisException e) {
return null;
}
}
}