--- /dev/null
+/*
+ * Copyright (c) 2015-2019. Developed by Hedgecode.
+ *
+ * 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.hedgecode.xml.xspf;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.util.Properties;
+
+/**
+ * Storage class represents a persistent set of typed properties.
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public class TypedProperties extends Properties {
+
+ public TypedProperties() {
+ this(null);
+ }
+
+ public TypedProperties(TypedProperties defaults) {
+ super(defaults);
+ }
+
+ public <T> T getProperty(String key, Class<T> type) {
+ Object object = get(key);
+ T val = type.isInstance(object) ? type.cast(object) : null;
+ return val == null
+ ? getDefProperty(key, type)
+ : val;
+ }
+
+ public <T> T getProperty(String key, Class<T> type, T defaultValue) {
+ T val = getProperty(key, type);
+ return val == null ? defaultValue : val;
+ }
+
+ public synchronized Object setProperty(String key, Object value) {
+ return put(key, value);
+ }
+
+ protected <T> T getDefProperty(String key, Class<T> type) {
+ if (defaults != null) {
+ Object object = defaults.get(key);
+ return type.isInstance(object) ? type.cast(object) : null;
+ }
+ return null;
+ }
+
+ @Override
+ public synchronized void load(Reader reader) throws IOException {
+ super.load(reader);
+ TypeSupport.cast(this);
+ }
+
+ @Override
+ public synchronized void load(InputStream inStream) throws IOException {
+ super.load(inStream);
+ TypeSupport.cast(this);
+ }
+
+ public String getString(String key) {
+ return getProperty(key, String.class);
+ }
+
+ public Byte getByte(String key) {
+ return getProperty(key, Byte.class);
+ }
+
+ public Short getShort(String key) {
+ return getProperty(key, Short.class);
+ }
+
+ public Integer getInteger(String key) {
+ return getProperty(key, Integer.class);
+ }
+
+ public Long getLong(String key) {
+ return getProperty(key, Long.class);
+ }
+
+ public Float getFloat(String key) {
+ return getProperty(key, Float.class);
+ }
+
+ public Double getDouble(String key) {
+ return getProperty(key, Double.class);
+ }
+
+ public Character getCharacter(String key) {
+ return getProperty(key, Character.class);
+ }
+
+ public Boolean getBoolean(String key) {
+ return getProperty(key, Boolean.class);
+ }
+
+ private enum TypeSupport {
+
+ INT ( "^-?\\d+$" ) {
+
+ @Override
+ Object parse(String value) {
+ return Integer.parseInt(value);
+ }
+
+ },
+
+ FLOAT ( "^-?[\\d.]+$" ) {
+
+ @Override
+ Object parse(String value) {
+ return Float.parseFloat(value);
+ }
+
+ },
+
+ BOOLEAN ( "^(TRUE|FALSE|[Tt]rue|[Ff]alse)$" ) {
+
+ @Override
+ Object parse(String value) {
+ return Boolean.parseBoolean(value);
+ }
+
+ };
+
+ private final String regex;
+
+ TypeSupport(String regex) {
+ this.regex = regex;
+ }
+
+ abstract Object parse(String value);
+
+ static TypeSupport getType(String value) {
+ if (value != null) {
+ for (TypeSupport typeSupport : TypeSupport.values()) {
+ if (value.matches(typeSupport.regex)) {
+ return typeSupport;
+ }
+ }
+ }
+ return null;
+ }
+
+ static void cast(Properties props) {
+ props.forEach((key, val) -> {
+ if (String.class.isInstance(val)) {
+ String value = (String) val;
+ TypeSupport typeSupport = getType(value);
+ if (typeSupport != null) {
+ props.replace(key, typeSupport.parse(value));
+ }
+ }
+ });
+ }
+
+ }
+
+}
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