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/*
 Copyright 2016 Goldman Sachs.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 */

package com.gs.fw.common.mithra.attribute;

import com.gs.collections.api.set.primitive.CharSet;
import com.gs.fw.common.mithra.attribute.calculator.procedure.CharacterProcedure;
import com.gs.fw.common.mithra.cache.offheap.OffHeapCharExtractorWithOffset;
import com.gs.fw.common.mithra.cache.offheap.OffHeapExtractor;
import com.gs.fw.common.mithra.extractor.asm.ExtractorWriter;
import com.gs.fw.common.mithra.finder.*;
import com.gs.fw.common.mithra.finder.charop.*;
import com.gs.fw.common.mithra.databasetype.DatabaseType;
import com.gs.fw.common.mithra.util.ColumnInfo;
import com.gs.fw.common.mithra.tempobject.TupleTempContext;
import com.gs.fw.common.mithra.util.fileparser.BitsInBytes;
import com.gs.fw.common.mithra.util.fileparser.ColumnarInStream;
import com.gs.fw.common.mithra.util.fileparser.ColumnarOutStream;
import org.slf4j.Logger;

import java.io.IOException;
import java.io.ObjectStreamException;
import java.io.OutputStream;
import java.sql.ResultSet;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;
import java.sql.Types;
import java.sql.PreparedStatement;
import java.sql.SQLException;


public abstract class SingleColumnCharAttribute extends CharAttribute implements SingleColumnAttribute
{
    private static final ExtractorWriter extractorWriter = ExtractorWriter.charExtractorWriter();

    private transient String columnName;
    private transient String uniqueAlias;

    private static final long serialVersionUID = 8582522398246912713L;

    protected SingleColumnCharAttribute(String columnName, String uniqueAlias, String attributeName,
            String busClassNameWithDots, String busClassName, boolean isNullablePrimitive,
            boolean hasBusDate, RelatedFinder relatedFinder, Map properties,
            boolean isTransactional, boolean isOptimistic)
    {
        this.columnName = columnName;
        this.uniqueAlias = uniqueAlias;
        this.setAll(attributeName, busClassNameWithDots, busClassName, isNullablePrimitive, relatedFinder, properties, isTransactional);
    }

    protected SingleColumnCharAttribute() {}

    public void setSqlParameters(PreparedStatement pps, Object mithraDataObject, int pos, TimeZone databaseTimeZone, DatabaseType databaseType)
            throws SQLException
    {
        if (this.isAttributeNull((T) mithraDataObject))
        {
            pps.setNull(pos, java.sql.Types.CHAR);
        }
        else
        {
            pps.setString(pos, "" + this.charValueOf((T) mithraDataObject));
        }
    }

    public void setColumnName(String columnName)
    {
        this.columnName = columnName;
    }

    public boolean isSourceAttribute()
    {
        return this.columnName == null;
    }

    public String getColumnName()
    {
        return this.columnName;
    }

    public Operation eq(char other)
    {
        return new CharEqOperation(this, other);
    }

    public Operation notEq(char other)
    {
        return new CharNotEqOperation(this, other);
    }

    @Override
    public Operation in(CharSet charSet)
    {
        if (charSet.isEmpty())
        {
            return new None(this);
        }
        if (charSet.size() == 1)
        {
            return this.eq(charSet.charIterator().next());
        }
        return new CharInOperation(this, charSet);
    }

    @Override
    public Operation notIn(CharSet charSet)
    {
        if (charSet.isEmpty())
        {
            return new All(this);
        }
        if (charSet.size() == 1)
        {
            return this.notEq(charSet.charIterator().next());
        }
        return new CharNotInOperation(this, charSet);
    }

    public Operation greaterThan(char target)
    {
        return new CharGreaterThanOperation(this, target);
    }

    public Operation greaterThanEquals(char target)
    {
        return new CharGreaterThanEqualsOperation(this, target);
    }

    public Operation lessThan(char target)
    {
        return new CharLessThanOperation(this, target);
    }

    public Operation lessThanEquals(char target)
    {
        return new CharLessThanEqualsOperation(this, target);
    }

    // join operation:
    public Operation eq(CharAttribute other)
    {
        return this.joinEqWithSourceAndAsOfCheck(other);
    }

    public Operation joinEq(CharAttribute other)
    {
        return this.joinEqWithSourceAndAsOfCheck(other);
    }

    public Operation filterEq(CharAttribute other)
    {
        return this.filterEqWithCheck(other);
    }

    public Operation notEq(CharAttribute other)
    {
        if (this.getOwnerPortal().equals(other.getOwnerPortal()))
        {
            return new AtomicSelfNotEqualityOperation(this, other);
        }
        throw new RuntimeException("Non-equality join is not yet supported");
    }

    public String getFullyQualifiedLeftHandExpression(SqlQuery query)
    {
        String result = this.getColumnName();
        String databaseAlias = query.getDatabaseAlias(this.getOwnerPortal());
        if (databaseAlias != null)
        {
            if (this.uniqueAlias != null)
            {
                result = databaseAlias + this.uniqueAlias + "." + result;
            }
            else
            {
                result = databaseAlias + "." + result;
            }
        }
        return result;
    }

    public void forEach(final CharacterProcedure proc, T o, Object context)
    {
        if (this.isAttributeNull(o))
        {
            proc.executeForNull(context);
        }
        else
        {
            proc.execute(this.charValueOf(o), context);
        }
    }

    protected Object writeReplace() throws ObjectStreamException
    {
        return this.getSerializationReplacement();
    }

    public void appendColumnDefinition(StringBuilder sb, DatabaseType dt, Logger sqlLogger, boolean mustBeIndexable)
    {
        sb.append(this.columnName).append(' ').append(dt.getSqlDataTypeForChar());
        appendNullable(sb, dt);
    }

    public boolean verifyColumn(ColumnInfo info)
    {
        if (info.isNullable() != this.isNullable()) return false;
        if (info.getSize() != 1) return false;
        return info.getType() == Types.CHAR || info.getType() == Types.VARCHAR;
    }

    public SingleColumnAttribute createTupleAttribute(int pos, TupleTempContext tupleTempContext)
    {
        return new SingleColumnTupleCharAttribute(pos, this.isNullable(), tupleTempContext);
    }

    public static SingleColumnCharAttribute generate(String columnName, String uniqueAlias, String attributeName,
            String busClassNameWithDots, String busClassName, boolean isNullablePrimitive,
            boolean hasBusDate, RelatedFinder relatedFinder, Map properties,
            boolean isTransactional, boolean isOptimistic, int offHeapFieldOffset, int offHeapNullBitsOffset, int offHeapNullBitsPosition, boolean hasShadowAttribute)
    {
        SingleColumnCharAttribute e = generateInternal(columnName, uniqueAlias, attributeName, busClassNameWithDots,
                busClassName, isNullablePrimitive, hasBusDate, relatedFinder, properties, isTransactional,
                isOptimistic, offHeapFieldOffset, offHeapNullBitsOffset, offHeapNullBitsPosition, false);
        if (hasShadowAttribute)
        {
            SingleColumnCharAttribute shadow = generateInternal(columnName, uniqueAlias, attributeName, busClassNameWithDots,
                    busClassName, isNullablePrimitive, hasBusDate, relatedFinder, properties, isTransactional,
                    isOptimistic, offHeapFieldOffset, offHeapNullBitsOffset, offHeapNullBitsPosition, true);
            e.setShadowAttribute(shadow);
        }
        return e;

    }

    private static SingleColumnCharAttribute generateInternal(String columnName, String uniqueAlias, String attributeName, String busClassNameWithDots,
            String busClassName, boolean isNullablePrimitive, boolean hasBusDate, RelatedFinder relatedFinder, Map properties,
            boolean isTransactional, boolean isOptimistic, int offHeapFieldOffset, int offHeapNullBitsOffset, int offHeapNullBitsPosition, boolean hasShadowAttribute)
    {
        SingleColumnCharAttribute e;
        try
        {
            e = (SingleColumnCharAttribute) extractorWriter.createClass(attributeName, isNullablePrimitive, hasBusDate, busClassNameWithDots,
                    busClassName, isOptimistic, offHeapFieldOffset, offHeapNullBitsOffset, offHeapNullBitsPosition, "com/gs/fw/common/mithra/attribute/SingleColumnCharAttribute", false, hasShadowAttribute).newInstance();
        }
        catch (Exception excp)
        {
            throw new RuntimeException("could not create class for "+attributeName+" in "+busClassName, excp);
        }
        e.columnName = columnName;
        e.uniqueAlias = uniqueAlias;
        e.setAll(attributeName, busClassNameWithDots, busClassName, isNullablePrimitive, relatedFinder, properties, isTransactional);
        e.setOffHeapOffsets(offHeapFieldOffset, offHeapNullBitsOffset, offHeapNullBitsPosition);
        return e;
    }

    public Object readResultSet(ResultSet rs, int pos, DatabaseType databaseType, TimeZone timeZone) throws SQLException
    {
        String result = rs.getString(pos);
        if (result == null || result.length() < 1)
        {
            return null;
        }
        return result.charAt(0);
    }

    public void writeValueToStream(T object, OutputStreamFormatter formatter, OutputStream os) throws IOException
    {
        formatter.write(this.charValueOf(object), os);
    }

    @Override
    public OffHeapExtractor zCreateOffHeapExtractor()
    {
        return new OffHeapCharExtractorWithOffset(this.offHeapFieldOffset, this.offHeapNullBitsOffset, this.offHeapNullBitsPosition);
    }

    @Override
    public void zEncodeColumnarData(List data, ColumnarOutStream out) throws IOException
    {
        BitsInBytes nulls = out.encodeColumnarNull(data, this);
        CharAttribute attr = (CharAttribute) this;

        for(int i=0;i>> 8);
                out.write(c & 0xFF);
            }
        }
    }

    @Override
    public void zDecodeColumnarData(List data, ColumnarInStream in) throws IOException
    {
        BitsInBytes nulls = in.decodeColumnarNull(this, data);
        CharAttribute attr = (CharAttribute) this;
        for(int i=0;i




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