net.sf.jasperreports.data.cache.StandardColumnCacheData.java Source code

Introduction

Here is the source code for net.sf.jasperreports.data.cache.StandardColumnCacheData.java

Source

/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with JasperReports. If not, see <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.data.cache;

import java.io.IOException;
import java.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.data.IndexedDataSource;

/**
 * @author Lucian Chirita (lucianc@users.sourceforge.net)
 */
public class StandardColumnCacheData implements Serializable, ColumnCacheData {

    private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;

    private static final Log log = LogFactory.getLog(StandardColumnCacheData.class);

    private String[] fieldNames;
    private int size;
    private ColumnValues[] values;
    private LinkedHashMap<String, Object> parameters;

    public StandardColumnCacheData(String[] fieldNames, int size, ColumnValues[] values,
            LinkedHashMap<String, Object> parameters) {
        if (fieldNames == null || values == null || fieldNames.length != values.length) {
            throw new IllegalArgumentException();
        }

        this.fieldNames = fieldNames;
        this.size = size;
        this.values = values;
        this.parameters = parameters;
    }

    private void writeObject(java.io.ObjectOutputStream out) throws IOException {
        int paramsCount = parameters == null ? 0 : parameters.size();
        out.writeInt(paramsCount);
        if (parameters != null) {
            for (Map.Entry<String, Object> entry : parameters.entrySet()) {
                out.writeObject(entry.getKey());
                out.writeObject(entry.getValue());
            }
        }

        out.writeInt(size);
        out.writeInt(fieldNames.length);
        for (int i = 0; i < fieldNames.length; i++) {
            out.writeObject(fieldNames[i]);
            out.writeObject(values[i]);
        }
    }

    private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
        int paramsCount = in.readInt();
        if (paramsCount > 0) {
            parameters = new LinkedHashMap<String, Object>(paramsCount * 4 / 3);
            for (int i = 0; i < paramsCount; i++) {
                String key = (String) in.readObject();
                Object value = in.readObject();
                parameters.put(key, value);
            }
        }

        size = in.readInt();
        int fieldCount = in.readInt();
        fieldNames = new String[fieldCount];
        values = new ColumnValues[fieldCount];
        for (int i = 0; i < fieldCount; i++) {
            fieldNames[i] = (String) in.readObject();
            values[i] = (ColumnValues) in.readObject();
        }
    }

    /* (non-Javadoc)
     * @see net.sf.jasperreports.data.cache.ColumnCacheData#isSerializable()
     */
    @Override
    public boolean isSerializable() {
        // only checking parameters because we know that field values are serializable
        boolean serializable = true;
        if (parameters != null) {
            for (Map.Entry<String, Object> parameter : parameters.entrySet()) {
                Object value = parameter.getValue();
                if (value != null && !(value instanceof Serializable)) {
                    if (log.isDebugEnabled()) {
                        log.debug("parameter " + parameter.getKey() + " has unserializable value of type "
                                + value.getClass().getName());
                    }

                    serializable = false;
                    break;
                }
            }
        }
        return serializable;
    }

    /* (non-Javadoc)
     * @see net.sf.jasperreports.data.cache.ColumnCacheData#createDataSource()
     */
    @Override
    public IndexedDataSource createDataSource() {
        return new ColumnValuesDataSource(fieldNames, size, values);
    }

    /* (non-Javadoc)
     * @see net.sf.jasperreports.data.cache.ColumnCacheData#size()
     */
    @Override
    public int size() {
        return size;
    }

    /* (non-Javadoc)
     * @see net.sf.jasperreports.data.cache.ColumnCacheData#getParameters()
     */
    @Override
    public Map<String, Object> getParameters() {
        return parameters;
    }
}