1 /**

     2  * SQL-DK

     3  * Copyright © 2013 František Kučera (frantovo.cz)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 package info.globalcode.sql.dk.configuration;

    19 

    20 import java.util.ArrayList;

    21 import javax.xml.bind.annotation.XmlTransient;

    22 import static info.globalcode.sql.dk.Functions.findByName;

    23 import java.util.Collections;

    24 

    25 /**

    26  * <p>

    27  * List of configurables.</p>

    28  *

    29  * <p>

    30  * Can be backed by defaults – if value for given name is nof found in this instance, we will

    31  * look into defaults. Methods also accept defaultValue parameter – is used if property is nof found

    32  * even in default properties.</p>

    33  *

    34  * <p>

    35  * Typical use: </p>

    36  * <ul>

    37  * <li>this instance – ad-hoc properties from CLI options</li>

    38  * <li>default properties – from config file</li>

    39  * <li>defaultValue – hardcoded default</li>

    40  * </ul>

    41  *

    42  * @author Ing. František Kučera (frantovo.cz)

    43  */

    44 public class Properties extends ArrayList<Property> implements Cloneable {

    45 

    46 	private Properties defaults;

    47 

    48 	public Properties() {

    49 	}

    50 

    51 	public Properties(int initialCapacity) {

    52 		super(initialCapacity);

    53 	}

    54 

    55 	@XmlTransient

    56 	public Properties getDefaults() {

    57 		return defaults;

    58 	}

    59 

    60 	public void setDefaults(Properties defaults) {

    61 		this.defaults = defaults;

    62 	}

    63 

    64 	/**

    65 	 * @param defaults the last/deepest defaults

    66 	 */

    67 	public void setLastDefaults(Properties defaults) {

    68 		if (this.defaults == null) {

    69 			this.defaults = defaults;

    70 		} else {

    71 			this.defaults.setLastDefaults(defaults);

    72 		}

    73 	}

    74 

    75 	private Property findProperty(String name) {

    76 		Property p = findByName(this, name);

    77 		if (p == null && defaults != null) {

    78 			p = defaults.findProperty(name);

    79 		}

    80 		return p;

    81 	}

    82 

    83 	public String getString(String name, String defaultValue) {

    84 		Property p = findProperty(name);

    85 		return p == null ? defaultValue : p.getValue();

    86 	}

    87 

    88 	public boolean getBoolean(String name, boolean defaultValue) {

    89 		Property p = findProperty(name);

    90 		return p == null ? defaultValue : Boolean.valueOf(p.getValue());

    91 	}

    92 

    93 	public int getInteger(String name, int defaultValue) {

    94 		Property p = findProperty(name);

    95 		return p == null ? defaultValue : Integer.valueOf(p.getValue());

    96 	}

    97 

    98 	public boolean hasProperty(String name) {

    99 		return findByName(this, name) != null;

   100 	}

   101 

   102 	@Override

   103 	public Properties clone() {

   104 		Properties clone = new Properties(size());

   105 		Collections.copy(clone, this);

   106 		return clone;

   107 	}

   108 

   109 	/**

   110 	 * @return merged this and backing defaults as Java Properties

   111 	 */

   112 	public java.util.Properties getJavaProperties() {

   113 		java.util.Properties javaProperties = new java.util.Properties();

   114 		duplicateTo(javaProperties);

   115 		return javaProperties;

   116 	}

   117 

   118 	private void duplicateTo(java.util.Properties javaProperties) {

   119 		if (defaults != null) {

   120 			defaults.duplicateTo(javaProperties);

   121 		}

   122 		for (Property p : this) {

   123 			String value = p.getValue();

   124 			if (value != null) {

   125 				javaProperties.setProperty(p.getName(), value);

   126 			}

   127 		}

   128 	}

   129 }