sascha@4068: package de.intevation.db;
sascha@4068: 
sascha@4068: import java.util.Properties;
sascha@4068: 
sascha@4068: import java.io.IOException;
sascha@4068: import java.io.InputStream;
sascha@4068: 
sascha@4068: import org.apache.log4j.Logger;
sascha@4068: 
sascha@4069: import java.util.Map;
sascha@4069: import java.util.HashMap;
sascha@4069: import java.util.Enumeration;
sascha@4069: 
sascha@4068: public class Statements
sascha@4068: {
sascha@4068:     private static Logger log = Logger.getLogger(Statements.class);
sascha@4068: 
sascha@4068:     public static final String RESOURCE_PATH = "/sql/";
sascha@4068:     public static final String COMMON_PROPERTIES = "-common.properties";
sascha@4068: 
sascha@4068:     protected String type;
sascha@4068:     protected String driver;
sascha@4068: 
sascha@4069:     protected Map<String, SymbolicStatement> statements;
sascha@4068: 
sascha@4068:     public Statements(String type, String driver) {
sascha@4068:         this.type   = type;
sascha@4068:         this.driver = driver;
sascha@4068:     }
sascha@4068: 
sascha@4069:     public SymbolicStatement getStatement(String key) {
sascha@4074:         return getStatements().get(key);
sascha@4074:     }
sascha@4074: 
sascha@4074:     public Map<String, SymbolicStatement> getStatements() {
sascha@4069:         if (statements == null) {
sascha@4069:             statements = loadStatements();
sascha@4069:         }
sascha@4074:         return statements;
sascha@4069:     }
sascha@4069: 
sascha@4069:     protected Map<String, SymbolicStatement> loadStatements() {
sascha@4069:         Map<String, SymbolicStatement> statements =
sascha@4069:             new HashMap<String, SymbolicStatement>();
sascha@4069: 
sascha@4069:         Properties properties = loadProperties();
sascha@4069: 
sascha@4069:         for (Enumeration e = properties.propertyNames(); e.hasMoreElements();) {
sascha@4069:             String key = (String)e.nextElement();
sascha@4069:             String value = properties.getProperty(key);
sascha@4069:             SymbolicStatement symbolic = new SymbolicStatement(value);
sascha@4069:             statements.put(key, symbolic);
sascha@4069:         }
sascha@4069: 
sascha@4069:         return statements;
sascha@4069:     }
sascha@4069: 
sascha@4068:     protected String driverToProperties() {
sascha@4068:         return
sascha@4068:             type + "-" + 
sascha@4068:             driver.replace('.', '-').toLowerCase() + ".properties";
sascha@4068:     }
sascha@4068: 
sascha@4068:     protected Properties loadCommon() {
sascha@4068:         Properties common = new Properties();
sascha@4068: 
sascha@4068:         String path = RESOURCE_PATH + type + COMMON_PROPERTIES;
sascha@4068: 
sascha@4068:         InputStream in = Statements.class.getResourceAsStream(path);
sascha@4068: 
sascha@4068:         if (in != null) {
sascha@4068:             try {
sascha@4068:                 common.load(in);
sascha@4068:             }
sascha@4068:             catch (IOException ioe) {
sascha@4068:                 log.error("cannot load defaults: " + path, ioe);
sascha@4068:             }
sascha@4068:             finally {
sascha@4068:                 try {
sascha@4068:                     in.close();
sascha@4068:                 }
sascha@4068:                 catch (IOException ioe) {
sascha@4068:                 }
sascha@4068:             }
sascha@4068:         }
sascha@4068:         else {
sascha@4068:             log.warn("cannot find: " + path);
sascha@4068:         }
sascha@4068: 
sascha@4068:         return common;
sascha@4068:     }
sascha@4068: 
sascha@4069:     protected Properties loadProperties() {
sascha@4068: 
sascha@4068:         Properties common = loadCommon();
sascha@4068: 
sascha@4069:         Properties properties = new Properties(common);
sascha@4068: 
sascha@4068:         String path = RESOURCE_PATH + driverToProperties();
sascha@4068: 
sascha@4068:         InputStream in = Statements.class.getResourceAsStream(path);
sascha@4068: 
sascha@4068:         if (in != null) {
sascha@4068:             try {
sascha@4068:                 properties.load(in);
sascha@4068:             }
sascha@4068:             catch (IOException ioe) {
sascha@4068:                 log.error("cannot load statements: " + path, ioe);
sascha@4068:             }
sascha@4068:             finally {
sascha@4068:                 try {
sascha@4068:                     in.close();
sascha@4068:                 }
sascha@4068:                 catch (IOException ioe) {
sascha@4068:                 }
sascha@4068:             }
sascha@4068:         }
sascha@4068:         else {
sascha@4068:             log.warn("cannot find: " + path);
sascha@4068:         }
sascha@4068: 
sascha@4068:         return properties;
sascha@4068:     }
sascha@4068: }
sascha@4068: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :