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JSimpleDB classes that map Java model classes onto the core API.
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/*
 * Copyright (C) 2015 Archie L. Cobbs. All rights reserved.
 */

package org.jsimpledb;

import com.google.common.base.Converter;
import com.google.common.base.Preconditions;
import com.google.common.reflect.TypeParameter;
import com.google.common.reflect.TypeToken;

import java.lang.reflect.Method;
import java.util.List;
import java.util.NavigableSet;

import org.jsimpledb.change.SetFieldAdd;
import org.jsimpledb.change.SetFieldClear;
import org.jsimpledb.change.SetFieldRemove;
import org.jsimpledb.schema.SetSchemaField;

/**
 * Represents a set field in a {@link JClass}.
 */
public class JSetField extends JCollectionField {

    JSetField(JSimpleDB jdb, String name, int storageId, JSimpleField elementField, String description, Method getter) {
        super(jdb, name, storageId, elementField, description, getter);
    }

    @Override
    public NavigableSet getValue(JObject jobj) {
        Preconditions.checkArgument(jobj != null, "null jobj");
        return jobj.getTransaction().readSetField(jobj.getObjId(), this.storageId, false);
    }

    @Override
    public  R visit(JFieldSwitch target) {
        return target.caseJSetField(this);
    }

    @Override
    SetSchemaField toSchemaItem(JSimpleDB jdb) {
        final SetSchemaField schemaField = new SetSchemaField();
        super.initialize(jdb, schemaField);
        return schemaField;
    }

    @Override
    SetElementIndexInfo toIndexInfo(JSimpleField subField) {
        assert subField == this.elementField;
        return new SetElementIndexInfo(this);
    }

    @Override
    @SuppressWarnings("serial")
     TypeToken> buildTypeToken(TypeToken elementType) {
        return new TypeToken>() { }.where(new TypeParameter() { }, elementType);
    }

    // This method exists solely to bind the generic type parameters
    @Override
    @SuppressWarnings("serial")
     void addChangeParameterTypes(List> types, Class targetType, TypeToken elementType) {
        types.add(new TypeToken>() { }
          .where(new TypeParameter() { }, targetType)
          .where(new TypeParameter() { }, elementType.wrap()));
        types.add(new TypeToken>() { }
          .where(new TypeParameter() { }, targetType));
        types.add(new TypeToken>() { }
          .where(new TypeParameter() { }, targetType)
          .where(new TypeParameter() { }, elementType.wrap()));
    }

    @Override
    public NavigableSetConverter getConverter(JTransaction jtx) {
        final Converter elementConverter = this.elementField.getConverter(jtx);
        return elementConverter != null ? this.createConverter(elementConverter) : null;
    }

    // This method exists solely to bind the generic type parameters
    private  NavigableSetConverter createConverter(Converter elementConverter) {
        return new NavigableSetConverter<>(elementConverter);
    }

// Bytecode generation

    @Override
    Method getFieldReaderMethod() {
        return ClassGenerator.JTRANSACTION_READ_SET_FIELD_METHOD;
    }
}