| /* |
| * Copyright 2012, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.jf.dexlib2.dexbacked; |
| |
| import org.jf.dexlib2.base.reference.BaseFieldReference; |
| import org.jf.dexlib2.dexbacked.raw.FieldIdItem; |
| import org.jf.dexlib2.dexbacked.util.AnnotationsDirectory; |
| import org.jf.dexlib2.dexbacked.util.StaticInitialValueIterator; |
| import org.jf.dexlib2.iface.ClassDef; |
| import org.jf.dexlib2.iface.Field; |
| import org.jf.dexlib2.iface.value.EncodedValue; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| import java.util.Set; |
| |
| public class DexBackedField extends BaseFieldReference implements Field { |
| @Nonnull public final DexBackedDexFile dexFile; |
| @Nonnull public final ClassDef classDef; |
| |
| public final int accessFlags; |
| @Nullable public final EncodedValue initialValue; |
| public final int annotationSetOffset; |
| |
| public final int fieldIndex; |
| |
| private int fieldIdItemOffset; |
| |
| public DexBackedField(@Nonnull DexReader reader, |
| @Nonnull DexBackedClassDef classDef, |
| int previousFieldIndex, |
| @Nonnull StaticInitialValueIterator staticInitialValueIterator, |
| @Nonnull AnnotationsDirectory.AnnotationIterator annotationIterator) { |
| this.dexFile = reader.dexBuf; |
| this.classDef = classDef; |
| |
| // large values may be used for the index delta, which cause the cumulative index to overflow upon |
| // addition, effectively allowing out of order entries. |
| int fieldIndexDiff = reader.readLargeUleb128(); |
| this.fieldIndex = fieldIndexDiff + previousFieldIndex; |
| this.accessFlags = reader.readSmallUleb128(); |
| |
| this.annotationSetOffset = annotationIterator.seekTo(fieldIndex); |
| this.initialValue = staticInitialValueIterator.getNextOrNull(); |
| } |
| |
| public DexBackedField(@Nonnull DexReader reader, |
| @Nonnull DexBackedClassDef classDef, |
| int previousFieldIndex, |
| @Nonnull AnnotationsDirectory.AnnotationIterator annotationIterator) { |
| this.dexFile = reader.dexBuf; |
| this.classDef = classDef; |
| |
| // large values may be used for the index delta, which cause the cumulative index to overflow upon |
| // addition, effectively allowing out of order entries. |
| int fieldIndexDiff = reader.readLargeUleb128(); |
| this.fieldIndex = fieldIndexDiff + previousFieldIndex; |
| this.accessFlags = reader.readSmallUleb128(); |
| |
| this.annotationSetOffset = annotationIterator.seekTo(fieldIndex); |
| this.initialValue = null; |
| } |
| |
| @Nonnull |
| @Override |
| public String getName() { |
| return dexFile.getString(dexFile.readSmallUint(getFieldIdItemOffset() + FieldIdItem.NAME_OFFSET)); |
| } |
| |
| @Nonnull |
| @Override |
| public String getType() { |
| return dexFile.getType(dexFile.readUshort(getFieldIdItemOffset() + FieldIdItem.TYPE_OFFSET)); |
| } |
| |
| @Nonnull @Override public String getDefiningClass() { return classDef.getType(); } |
| @Override public int getAccessFlags() { return accessFlags; } |
| @Nullable @Override public EncodedValue getInitialValue() { return initialValue; } |
| |
| @Nonnull |
| @Override |
| public Set<? extends DexBackedAnnotation> getAnnotations() { |
| return AnnotationsDirectory.getAnnotations(dexFile, annotationSetOffset); |
| } |
| |
| /** |
| * Skips the reader over the specified number of encoded_field structures |
| * |
| * @param reader The reader to skip |
| * @param count The number of encoded_field structures to skip over |
| */ |
| public static void skipFields(@Nonnull DexReader reader, int count) { |
| for (int i=0; i<count; i++) { |
| reader.skipUleb128(); |
| reader.skipUleb128(); |
| } |
| } |
| |
| private int getFieldIdItemOffset() { |
| if (fieldIdItemOffset == 0) { |
| fieldIdItemOffset = dexFile.getFieldIdItemOffset(fieldIndex); |
| } |
| return fieldIdItemOffset; |
| } |
| } |