org.pentaho.reporting.platform.plugin.gwt.client.ParameterValues.java Source code

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Here is the source code for org.pentaho.reporting.platform.plugin.gwt.client.ParameterValues.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program 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.
 *
 * Copyright 2010-2013 Pentaho Corporation.  All rights reserved.
 */

package org.pentaho.reporting.platform.plugin.gwt.client;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import com.google.gwt.http.client.URL;
import com.google.gwt.user.client.Window;

public class ParameterValues {
    private HashMap<String, ArrayList<String>> backend;
    private boolean trace;

    public ParameterValues() {
        backend = new HashMap<String, ArrayList<String>>();
    }

    public void setSelectedValue(final String parameter, final String value) {
        setSelectedValues(parameter, new String[] { value });
    }

    public void setSelectedValues(final String parameter, final String[] values) {
        if (values.length == 0) {
            backend.remove(parameter);
            return;
        }

        ArrayList<String> strings = backend.get(parameter);
        if (strings == null) {
            strings = new ArrayList<String>();
            backend.put(parameter, strings);
        }
        strings.clear();
        strings.addAll(Arrays.asList(values));
    }

    public void addSelectedValue(final String parameter, final String value) {
        ArrayList<String> strings = backend.get(parameter);
        if (strings == null) {
            strings = new ArrayList<String>();
            backend.put(parameter, strings);
        }
        strings.add(value);
    }

    public void removeSelectedValue(final String parameter, final String value) {
        final ArrayList<String> strings = backend.get(parameter);
        if (strings == null) {
            return;
        }
        strings.remove(value);
        if (strings.isEmpty()) {
            backend.remove(parameter);
        }
    }

    public String[] getParameterNames() {
        return backend.keySet().toArray(new String[backend.size()]);
    }

    public String[] getParameterValues(final String name) {
        final ArrayList<String> strings = backend.get(name);
        if (strings == null) {
            return null;
        }
        return strings.toArray(new String[strings.size()]);
    }

    public boolean containsParameter(final String name) {
        return backend.containsKey(name);
    }

    public String toURL() {
        final StringBuffer b = new StringBuffer();
        for (final Map.Entry<String, ArrayList<String>> entry : backend.entrySet()) {
            final String key = URL.encodeComponent(entry.getKey());
            final ArrayList<String> list = entry.getValue();
            for (final String value : list) {
                if (value == null) {
                    continue;
                }

                if (b.length() > 0) {
                    b.append("&");
                }
                b.append(key);
                b.append('=');
                b.append(URL.encodeComponent(value));
            }
        }
        return b.toString();
    }
}