| /* |
| * 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 com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import org.jf.dexlib2.base.reference.BaseMethodReference; |
| import org.jf.dexlib2.dexbacked.raw.MethodIdItem; |
| import org.jf.dexlib2.dexbacked.raw.ProtoIdItem; |
| import org.jf.dexlib2.dexbacked.raw.TypeListItem; |
| import org.jf.dexlib2.dexbacked.util.AnnotationsDirectory; |
| import org.jf.dexlib2.dexbacked.util.FixedSizeList; |
| import org.jf.dexlib2.dexbacked.util.ParameterIterator; |
| import org.jf.dexlib2.iface.Annotation; |
| import org.jf.dexlib2.iface.Method; |
| import org.jf.dexlib2.iface.MethodParameter; |
| import org.jf.util.AbstractForwardSequentialList; |
| |
| import javax.annotation.Nonnull; |
| import javax.annotation.Nullable; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| public class DexBackedMethod extends BaseMethodReference implements Method { |
| @Nonnull public final DexBackedDexFile dexFile; |
| @Nonnull public final DexBackedClassDef classDef; |
| |
| public final int accessFlags; |
| |
| private final int codeOffset; |
| private final int parameterAnnotationSetListOffset; |
| private final int methodAnnotationSetOffset; |
| |
| public final int methodIndex; |
| |
| private int methodIdItemOffset; |
| private int protoIdItemOffset; |
| private int parametersOffset = -1; |
| |
| public DexBackedMethod(@Nonnull DexReader reader, |
| @Nonnull DexBackedClassDef classDef, |
| int previousMethodIndex) { |
| 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 methodIndexDiff = reader.readLargeUleb128(); |
| this.methodIndex = methodIndexDiff + previousMethodIndex; |
| this.accessFlags = reader.readSmallUleb128(); |
| this.codeOffset = reader.readSmallUleb128(); |
| |
| this.methodAnnotationSetOffset = 0; |
| this.parameterAnnotationSetListOffset = 0; |
| } |
| |
| public DexBackedMethod(@Nonnull DexReader reader, |
| @Nonnull DexBackedClassDef classDef, |
| int previousMethodIndex, |
| @Nonnull AnnotationsDirectory.AnnotationIterator methodAnnotationIterator, |
| @Nonnull AnnotationsDirectory.AnnotationIterator paramaterAnnotationIterator) { |
| 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 methodIndexDiff = reader.readLargeUleb128(); |
| this.methodIndex = methodIndexDiff + previousMethodIndex; |
| this.accessFlags = reader.readSmallUleb128(); |
| this.codeOffset = reader.readSmallUleb128(); |
| |
| this.methodAnnotationSetOffset = methodAnnotationIterator.seekTo(methodIndex); |
| this.parameterAnnotationSetListOffset = paramaterAnnotationIterator.seekTo(methodIndex); |
| } |
| |
| public int getMethodIndex() { return methodIndex; } |
| @Nonnull @Override public String getDefiningClass() { return classDef.getType(); } |
| @Override public int getAccessFlags() { return accessFlags; } |
| |
| @Nonnull |
| @Override |
| public String getName() { |
| return dexFile.getString(dexFile.readSmallUint(getMethodIdItemOffset() + MethodIdItem.NAME_OFFSET)); |
| } |
| |
| @Nonnull |
| @Override |
| public String getReturnType() { |
| return dexFile.getType(dexFile.readSmallUint(getProtoIdItemOffset() + ProtoIdItem.RETURN_TYPE_OFFSET)); |
| } |
| |
| @Nonnull |
| @Override |
| public List<? extends MethodParameter> getParameters() { |
| int parametersOffset = getParametersOffset(); |
| if (parametersOffset > 0) { |
| final List<String> parameterTypes = getParameterTypes(); |
| |
| return new AbstractForwardSequentialList<MethodParameter>() { |
| @Nonnull @Override public Iterator<MethodParameter> iterator() { |
| return new ParameterIterator(parameterTypes, |
| getParameterAnnotations(), |
| getParameterNames()); |
| } |
| |
| @Override public int size() { |
| return parameterTypes.size(); |
| } |
| }; |
| } |
| return ImmutableList.of(); |
| } |
| |
| @Nonnull |
| public List<? extends Set<? extends DexBackedAnnotation>> getParameterAnnotations() { |
| return AnnotationsDirectory.getParameterAnnotations(dexFile, parameterAnnotationSetListOffset); |
| } |
| |
| @Nonnull |
| public Iterator<String> getParameterNames() { |
| DexBackedMethodImplementation methodImpl = getImplementation(); |
| if (methodImpl != null) { |
| return methodImpl.getParameterNames(null); |
| } |
| return ImmutableSet.<String>of().iterator(); |
| } |
| |
| @Nonnull |
| @Override |
| public List<String> getParameterTypes() { |
| final int parametersOffset = getParametersOffset(); |
| if (parametersOffset > 0) { |
| final int parameterCount = dexFile.readSmallUint(parametersOffset + TypeListItem.SIZE_OFFSET); |
| final int paramListStart = parametersOffset + TypeListItem.LIST_OFFSET; |
| return new FixedSizeList<String>() { |
| @Nonnull |
| @Override |
| public String readItem(final int index) { |
| return dexFile.getType(dexFile.readUshort(paramListStart + 2*index)); |
| } |
| @Override public int size() { return parameterCount; } |
| }; |
| } |
| return ImmutableList.of(); |
| } |
| |
| @Nonnull |
| @Override |
| public Set<? extends Annotation> getAnnotations() { |
| return AnnotationsDirectory.getAnnotations(dexFile, methodAnnotationSetOffset); |
| } |
| |
| @Nullable |
| @Override |
| public DexBackedMethodImplementation getImplementation() { |
| if (codeOffset > 0) { |
| return new DexBackedMethodImplementation(dexFile, this, codeOffset); |
| } |
| return null; |
| } |
| |
| private int getMethodIdItemOffset() { |
| if (methodIdItemOffset == 0) { |
| methodIdItemOffset = dexFile.getMethodIdItemOffset(methodIndex); |
| } |
| return methodIdItemOffset; |
| } |
| |
| private int getProtoIdItemOffset() { |
| if (protoIdItemOffset == 0) { |
| int protoIndex = dexFile.readUshort(getMethodIdItemOffset() + MethodIdItem.PROTO_OFFSET); |
| protoIdItemOffset = dexFile.getProtoIdItemOffset(protoIndex); |
| } |
| return protoIdItemOffset; |
| } |
| |
| private int getParametersOffset() { |
| if (parametersOffset == -1) { |
| parametersOffset = dexFile.readSmallUint(getProtoIdItemOffset() + ProtoIdItem.PARAMETERS_OFFSET); |
| } |
| return parametersOffset; |
| } |
| |
| /** |
| * Skips the reader over the specified number of encoded_method structures |
| * |
| * @param reader The reader to skip |
| * @param count The number of encoded_method structures to skip over |
| */ |
| public static void skipMethods(@Nonnull DexReader reader, int count) { |
| for (int i=0; i<count; i++) { |
| reader.skipUleb128(); |
| reader.skipUleb128(); |
| reader.skipUleb128(); |
| } |
| } |
| } |