BuilderContext.java

/*
 * Copyright 2013, Google Inc.
 * All rights reserved.
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 * 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.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * 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,
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package org.jf.dexlib2.writer.builder;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterators;

import org.jf.dexlib2.ValueType;
import org.jf.dexlib2.iface.AnnotationElement;
import org.jf.dexlib2.iface.value.AnnotationEncodedValue;
import org.jf.dexlib2.iface.value.ArrayEncodedValue;
import org.jf.dexlib2.iface.value.BooleanEncodedValue;
import org.jf.dexlib2.iface.value.ByteEncodedValue;
import org.jf.dexlib2.iface.value.CharEncodedValue;
import org.jf.dexlib2.iface.value.DoubleEncodedValue;
import org.jf.dexlib2.iface.value.EncodedValue;
import org.jf.dexlib2.iface.value.EnumEncodedValue;
import org.jf.dexlib2.iface.value.FieldEncodedValue;
import org.jf.dexlib2.iface.value.FloatEncodedValue;
import org.jf.dexlib2.iface.value.IntEncodedValue;
import org.jf.dexlib2.iface.value.LongEncodedValue;
import org.jf.dexlib2.iface.value.MethodEncodedValue;
import org.jf.dexlib2.iface.value.ShortEncodedValue;
import org.jf.dexlib2.iface.value.StringEncodedValue;
import org.jf.dexlib2.iface.value.TypeEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderAnnotationEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderArrayEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderBooleanEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderByteEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderCharEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderDoubleEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderEnumEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderFieldEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderFloatEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderIntEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderLongEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderMethodEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderNullEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderShortEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderStringEncodedValue;
import org.jf.dexlib2.writer.builder.BuilderEncodedValues.BuilderTypeEncodedValue;
import org.jf.util.ExceptionWithContext;

import java.util.Set;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

class BuilderContext {
    // keep our own local references to the various pools, using the Builder specific pool type;
    @Nonnull
    final BuilderStringPool stringPool;
    @Nonnull
    final BuilderTypePool typePool;
    @Nonnull
    final BuilderFieldPool fieldPool;
    @Nonnull
    final BuilderMethodPool methodPool;
    @Nonnull
    final BuilderProtoPool protoPool;
    @Nonnull
    final BuilderClassPool classPool;

    @Nonnull
    final BuilderTypeListPool typeListPool;
    @Nonnull
    final BuilderAnnotationPool annotationPool;
    @Nonnull
    final BuilderAnnotationSetPool annotationSetPool;


    BuilderContext() {
        this.stringPool = new BuilderStringPool();
        this.typePool = new BuilderTypePool(this);
        this.fieldPool = new BuilderFieldPool(this);
        this.methodPool = new BuilderMethodPool(this);
        this.protoPool = new BuilderProtoPool(this);
        this.classPool = new BuilderClassPool();

        this.typeListPool = new BuilderTypeListPool(this);
        this.annotationPool = new BuilderAnnotationPool(this);
        this.annotationSetPool = new BuilderAnnotationSetPool(this);
    }

    @Nonnull
    Set<? extends BuilderAnnotationElement> internAnnotationElements(
            @Nonnull Set<? extends AnnotationElement> elements) {
        return ImmutableSet.copyOf(
                Iterators.transform(elements.iterator(),
                        new Function<AnnotationElement, BuilderAnnotationElement>() {
                            @Nullable
                            @Override
                            public BuilderAnnotationElement apply(AnnotationElement input) {
                                return internAnnotationElement(input);
                            }
                        }));
    }

    @Nonnull
    private BuilderAnnotationElement internAnnotationElement(@Nonnull AnnotationElement annotationElement) {
        return new BuilderAnnotationElement(stringPool.internString(annotationElement.getName()),
                internEncodedValue(annotationElement.getValue()));
    }

    @Nullable
    BuilderEncodedValue internNullableEncodedValue(@Nullable EncodedValue encodedValue) {
        if (encodedValue == null) {
            return null;
        }
        return internEncodedValue(encodedValue);
    }

    @Nonnull
    private BuilderEncodedValue internEncodedValue(@Nonnull EncodedValue encodedValue) {
        switch (encodedValue.getValueType()) {
            case ValueType.ANNOTATION:
                return internAnnotationEncodedValue((AnnotationEncodedValue) encodedValue);
            case ValueType.ARRAY:
                return internArrayEncodedValue((ArrayEncodedValue) encodedValue);
            case ValueType.BOOLEAN:
                boolean value = ((BooleanEncodedValue) encodedValue).getValue();
                return value ? BuilderBooleanEncodedValue.TRUE_VALUE : BuilderBooleanEncodedValue.FALSE_VALUE;
            case ValueType.BYTE:
                return new BuilderByteEncodedValue(((ByteEncodedValue) encodedValue).getValue());
            case ValueType.CHAR:
                return new BuilderCharEncodedValue(((CharEncodedValue) encodedValue).getValue());
            case ValueType.DOUBLE:
                return new BuilderDoubleEncodedValue(((DoubleEncodedValue) encodedValue).getValue());
            case ValueType.ENUM:
                return internEnumEncodedValue((EnumEncodedValue) encodedValue);
            case ValueType.FIELD:
                return internFieldEncodedValue((FieldEncodedValue) encodedValue);
            case ValueType.FLOAT:
                return new BuilderFloatEncodedValue(((FloatEncodedValue) encodedValue).getValue());
            case ValueType.INT:
                return new BuilderIntEncodedValue(((IntEncodedValue) encodedValue).getValue());
            case ValueType.LONG:
                return new BuilderLongEncodedValue(((LongEncodedValue) encodedValue).getValue());
            case ValueType.METHOD:
                return internMethodEncodedValue((MethodEncodedValue) encodedValue);
            case ValueType.NULL:
                return BuilderNullEncodedValue.INSTANCE;
            case ValueType.SHORT:
                return new BuilderShortEncodedValue(((ShortEncodedValue) encodedValue).getValue());
            case ValueType.STRING:
                return internStringEncodedValue((StringEncodedValue) encodedValue);
            case ValueType.TYPE:
                return internTypeEncodedValue((TypeEncodedValue) encodedValue);
            default:
                throw new ExceptionWithContext("Unexpected encoded value type: %d", encodedValue.getValueType());
        }
    }

    @Nonnull
    private BuilderAnnotationEncodedValue internAnnotationEncodedValue(@Nonnull AnnotationEncodedValue value) {
        return new BuilderAnnotationEncodedValue(
                typePool.internType(value.getType()),
                internAnnotationElements(value.getElements()));
    }

    @Nonnull
    private BuilderArrayEncodedValue internArrayEncodedValue(@Nonnull ArrayEncodedValue value) {
        return new BuilderArrayEncodedValue(
                ImmutableList.copyOf(
                        Iterators.transform(value.getValue().iterator(),
                                new Function<EncodedValue, BuilderEncodedValue>() {
                                    @Nullable
                                    @Override
                                    public BuilderEncodedValue apply(EncodedValue input) {
                                        return internEncodedValue(input);
                                    }
                                })));
    }

    @Nonnull
    private BuilderEnumEncodedValue internEnumEncodedValue(@Nonnull EnumEncodedValue value) {
        return new BuilderEnumEncodedValue(fieldPool.internField(value.getValue()));
    }

    @Nonnull
    private BuilderFieldEncodedValue internFieldEncodedValue(@Nonnull FieldEncodedValue value) {
        return new BuilderFieldEncodedValue(fieldPool.internField(value.getValue()));
    }

    @Nonnull
    private BuilderMethodEncodedValue internMethodEncodedValue(@Nonnull MethodEncodedValue value) {
        return new BuilderMethodEncodedValue(methodPool.internMethod(value.getValue()));
    }

    @Nonnull
    private BuilderStringEncodedValue internStringEncodedValue(@Nonnull StringEncodedValue string) {
        return new BuilderStringEncodedValue(stringPool.internString(string.getValue()));
    }

    @Nonnull
    private BuilderTypeEncodedValue internTypeEncodedValue(@Nonnull TypeEncodedValue type) {
        return new BuilderTypeEncodedValue(typePool.internType(type.getValue()));
    }
}