org.soulwing.jawb.poi.ApachePoiCell.java Source code

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Here is the source code for org.soulwing.jawb.poi.ApachePoiCell.java

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/*
 * File created on Dec 21, 2013 
 *
 * Copyright (c) 2013 Carl Harris, Jr.
 *
 * 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 org.soulwing.jawb.poi;

import java.util.Date;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.soulwing.jawb.spi.BoundCell;
import org.soulwing.jawb.spi.BoundCellReference;

/**
 * A {@link BoundCell} that delegates to a POI {@link Cell}.
 *
 * @author Carl Harris
 */
class ApachePoiCell implements BoundCell {

    private final Cell delegate;
    private final BoundCellReference ref;
    private final boolean useDate1904;

    public ApachePoiCell(Cell delegate, BoundCellReference ref, boolean useDate1904) {
        this.delegate = delegate;
        this.ref = ref;
        this.useDate1904 = useDate1904;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public BoundCellReference getReference() {
        return ref;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isBlank() {
        return delegate == null || delegate.getCellType() == Cell.CELL_TYPE_BLANK;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Object getValue() {
        if (isBlank())
            return null;
        try {
            return getStringValue();
        } catch (IllegalStateException ex1) {
            try {
                return getNumericValue();
            } catch (IllegalStateException ex2) {
                try {
                    return getBooleanValue();
                } catch (IllegalStateException ex3) {
                    throw new IllegalStateException("unrecognized cell content");
                }
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean getBooleanValue() {
        if (isBlank()) {
            throw new IllegalStateException("blank value");
        }
        return delegate.getBooleanCellValue();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Date getDateValue() {
        if (isBlank()) {
            return null;
        }
        double numericValue = delegate.getNumericCellValue();
        if (!DateUtil.isValidExcelDate(numericValue)) {
            throw new IllegalStateException("not a valid date");
        }
        return DateUtil.getJavaDate(numericValue, useDate1904);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public double getNumericValue() {
        if (isBlank()) {
            throw new IllegalStateException("blank value");
        }
        return delegate.getNumericCellValue();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String getStringValue() {
        if (isBlank()) {
            throw new IllegalStateException("blank value");
        }
        return delegate.getStringCellValue();
    }

}