smalidea/src/main/java/org/jf/smalidea/dexlib/SmalideaMethod.java

/*
 * Copyright 2014, 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.
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 * 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,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.jf.smalidea.dexlib;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiParameter;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jf.dexlib2.base.reference.BaseMethodReference;
import org.jf.dexlib2.iface.*;
import org.jf.dexlib2.iface.debug.DebugItem;
import org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.smalidea.dexlib.instruction.SmalideaInstruction;
import org.jf.smalidea.psi.impl.SmaliCatchStatement;
import org.jf.smalidea.psi.impl.SmaliInstruction;
import org.jf.smalidea.psi.impl.SmaliMethod;
import org.jf.smalidea.psi.impl.SmaliMethodParameter;
import org.jf.smalidea.util.NameUtils;

import javax.annotation.Nonnull;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

public class SmalideaMethod extends BaseMethodReference implements Method {
    private final SmaliMethod psiMethod;

    public SmalideaMethod(@NotNull SmaliMethod psiMethod) {
        this.psiMethod = psiMethod;
    }

    @Nonnull @Override public String getDefiningClass() {
        PsiClass cls = psiMethod.getContainingClass();
        assert cls != null;
        String qualifiedName = cls.getQualifiedName();
        assert qualifiedName != null;
        return NameUtils.javaToSmaliType(qualifiedName);
    }

    @Nonnull @Override public List<? extends MethodParameter> getParameters() {
        SmaliMethodParameter[] parameters = psiMethod.getParameterList().getParameters();

        return Lists.transform(Arrays.asList(parameters), new Function<SmaliMethodParameter, MethodParameter>() {
            @Nullable @Override
            public MethodParameter apply(@Nullable SmaliMethodParameter smaliParameter) {
                if (smaliParameter == null) {
                    return null;
                }
                return new SmalideaMethodParameter(smaliParameter);
            }
        });
    }

    @Override public int getAccessFlags() {
        return psiMethod.getModifierList().getAccessFlags();
    }

    @Nonnull @Override public Set<? extends Annotation> getAnnotations() {
        // TODO: implement this
        return ImmutableSet.of();
    }

    @Nullable @Override public MethodImplementation getImplementation() {
        List<SmaliInstruction> instructions = psiMethod.getInstructions();
        if (instructions.size() == 0) {
            return null;
        }

        // TODO: cache this?
        return new MethodImplementation() {
            @Override public int getRegisterCount() {
                return psiMethod.getRegisterCount();
            }

            @Nonnull @Override public Iterable<? extends Instruction> getInstructions() {
                return Lists.transform(psiMethod.getInstructions(),
                        new Function<SmaliInstruction, Instruction>() {
                            @Override
                            public Instruction apply(SmaliInstruction smaliInstruction) {
                                return SmalideaInstruction.of(smaliInstruction);
                            }
                        });
            }

            @Nonnull @Override public List<? extends TryBlock<? extends ExceptionHandler>> getTryBlocks() {
                return Lists.transform(psiMethod.getCatchStatements(),
                        new Function<SmaliCatchStatement, TryBlock<? extends ExceptionHandler>>() {
                            @Override
                            public TryBlock<? extends ExceptionHandler> apply(
                                    SmaliCatchStatement smaliCatchStatement) {
                                assert smaliCatchStatement != null;
                                return new SmalideaTryBlock(smaliCatchStatement);
                            }
                        });
            }

            @Nonnull @Override public Iterable<? extends DebugItem> getDebugItems() {
                // TODO: implement this
                return ImmutableList.of();
            }
        };
    }

    @Nonnull @Override public String getName() {
        return psiMethod.getName();
    }

    @Nonnull @Override public List<? extends CharSequence> getParameterTypes() {
        PsiParameter[] parameters = psiMethod.getParameterList().getParameters();

        return Lists.transform(Arrays.asList(parameters), new Function<PsiParameter, CharSequence>() {
            @Nullable @Override
            public CharSequence apply(@Nullable PsiParameter psiParameter) {
                if (psiParameter == null) {
                    return null;
                }
                return psiParameter.getText();
            }
        });
    }

    @Nonnull @Override public String getReturnType() {
        return psiMethod.getReturnTypeElement().getText();
    }
}