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/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma.analysis;

import com.strobel.assembler.metadata.FieldDefinition;
import com.strobel.assembler.metadata.MethodDefinition;
import com.strobel.assembler.metadata.TypeDefinition;
import com.strobel.assembler.metadata.TypeReference;
import com.strobel.decompiler.languages.TextLocation;
import com.strobel.decompiler.languages.java.ast.*;

import cuchaz.enigma.mapping.*;

public class SourceIndexClassVisitor extends SourceIndexVisitor {

    private ClassEntry m_classEntry;

    public SourceIndexClassVisitor(ClassEntry classEntry) {
        m_classEntry = classEntry;
    }

    @Override
    public Void visitTypeDeclaration(TypeDeclaration node, SourceIndex index) {
        // is this this class, or a subtype?
        TypeDefinition def = node.getUserData(Keys.TYPE_DEFINITION);
        ClassEntry classEntry = new ClassEntry(def.getInternalName());
        if (!classEntry.equals(m_classEntry)) {
            // it's a sub-type, recurse
            index.addDeclaration(node.getNameToken(), classEntry);
            return node.acceptVisitor(new SourceIndexClassVisitor(classEntry), index);
        }

        return recurse(node, index);
    }

    @Override
    public Void visitSimpleType(SimpleType node, SourceIndex index) {
        TypeReference ref = node.getUserData(Keys.TYPE_REFERENCE);
        if (node.getIdentifierToken().getStartLocation() != TextLocation.EMPTY) {
            ClassEntry classEntry = new ClassEntry(ref.getInternalName());
            index.addReference(node.getIdentifierToken(), classEntry, m_classEntry);
        }

        return recurse(node, index);
    }

    @Override
    public Void visitMethodDeclaration(MethodDeclaration node, SourceIndex index) {
        MethodDefinition def = node.getUserData(Keys.METHOD_DEFINITION);
        BehaviorEntry behaviorEntry = ProcyonEntryFactory.getBehaviorEntry(def);
        AstNode tokenNode = node.getNameToken();

        if (behaviorEntry instanceof ConstructorEntry) {
            ConstructorEntry constructorEntry = (ConstructorEntry) behaviorEntry;
            if (constructorEntry.isStatic()) {
                // for static initializers, check elsewhere for the token node
                tokenNode = node.getModifiers().firstOrNullObject();
            }
        }
        index.addDeclaration(tokenNode, behaviorEntry);
        return node.acceptVisitor(new SourceIndexBehaviorVisitor(behaviorEntry), index);
    }

    @Override
    public Void visitConstructorDeclaration(ConstructorDeclaration node, SourceIndex index) {
        MethodDefinition def = node.getUserData(Keys.METHOD_DEFINITION);
        ConstructorEntry constructorEntry = ProcyonEntryFactory.getConstructorEntry(def);
        index.addDeclaration(node.getNameToken(), constructorEntry);
        return node.acceptVisitor(new SourceIndexBehaviorVisitor(constructorEntry), index);
    }

    @Override
    public Void visitFieldDeclaration(FieldDeclaration node, SourceIndex index) {
        FieldDefinition def = node.getUserData(Keys.FIELD_DEFINITION);
        FieldEntry fieldEntry = ProcyonEntryFactory.getFieldEntry(def);
        assert (node.getVariables().size() == 1);
        VariableInitializer variable = node.getVariables().firstOrNullObject();
        index.addDeclaration(variable.getNameToken(), fieldEntry);

        return recurse(node, index);
    }

    @Override
    public Void visitEnumValueDeclaration(EnumValueDeclaration node, SourceIndex index) {
        // treat enum declarations as field declarations
        FieldDefinition def = node.getUserData(Keys.FIELD_DEFINITION);
        FieldEntry fieldEntry = ProcyonEntryFactory.getFieldEntry(def);
        index.addDeclaration(node.getNameToken(), fieldEntry);

        return recurse(node, index);
    }
}