[New] Added StringHelper.replacePropertiesIn() with special prefix
- and added a test
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@ -385,6 +385,27 @@ public class StringHelper {
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*/
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public static String replacePropertiesIn(Properties properties, String value) {
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return replacePropertiesIn(properties, '$', value);
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}
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/**
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* Traverses the given string searching for occurrences of <code>prefix</code>{...} sequences. Theses sequences are
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* replaced with a {@link Properties#getProperty(String)} value if such a value exists in the properties map. If the
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* value of the sequence is not in the properties, then the sequence is not replaced
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*
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* @param properties
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* the {@link Properties} in which to get the value
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* @param prefix
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* the prefix to use, for instance use <code>$</code> to replace occurrences of <code>$</code>{...}
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* @param value
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* the value in which to replace any system properties
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*
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* @return a new string with all defined properties replaced or if an error occurred the original value is returned
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*/
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public static String replacePropertiesIn(Properties properties, char prefix, String value) {
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String prefixS = String.valueOf(prefix);
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// get a copy of the value
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String tmpValue = value;
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@ -393,7 +414,7 @@ public class StringHelper {
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int stop = 0;
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// loop on $ character positions
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while ((pos = tmpValue.indexOf('$', pos + 1)) != -1) {
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while ((pos = tmpValue.indexOf(prefix, pos + 1)) != -1) {
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// if pos+1 is not { character then continue
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if (tmpValue.charAt(pos + 1) != '{') {
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@ -414,9 +435,9 @@ public class StringHelper {
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String sequence = tmpValue.substring(pos + 2, stop);
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// make sure sequence doesn't contain $ { } characters
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if (sequence.contains("$") || sequence.contains("{") || sequence.contains("}")) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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String msg = "Enclosed sequence in offsets {0} - {1} contains one of the illegal chars: $ { }: {2}"; //$NON-NLS-1$
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msg = MessageFormat.format(msg, pos, stop, sequence);
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if (sequence.contains(prefixS) || sequence.contains("{") || sequence.contains("}")) { //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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String msg = "Enclosed sequence in offsets {0} - {1} contains one of the illegal chars: {2} { }: {3}";
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msg = MessageFormat.format(msg, pos, stop, prefixS, sequence);
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logger.error(msg);
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tmpValue = value;
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break;
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@ -432,7 +453,7 @@ public class StringHelper {
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}
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// property exists, so replace in value
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tmpValue = tmpValue.replace("${" + sequence + "}", property); //$NON-NLS-1$ //$NON-NLS-2$
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tmpValue = tmpValue.replace(prefixS + "{" + sequence + "}", property); //$NON-NLS-1$ //$NON-NLS-2$
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}
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return tmpValue;
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@ -0,0 +1,138 @@
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package ch.eitchnet.utils.helper;
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import static org.junit.Assert.assertEquals;
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import java.util.Properties;
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import org.junit.Test;
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public class ReplacePropertiesInTest {
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@Test
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public void shouldReplaceProps1() {
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String expr = "bla ${foo}";
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String expected = "bla bar";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps2() {
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String expr = "${foo} bla ";
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String expected = "bar bla ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps3() {
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String expr = "bla ${foo} ";
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String expected = "bla bar ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps4() {
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String expr = "bla${foo}abr";
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String expected = "blabarabr";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps5() {
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String expr = "bla '${foo}' ";
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String expected = "bla 'bar' ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps6() {
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String expr = "${foo}bla ${foo} ";
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String expected = "barbla bar ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps7() {
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String expr = "${foo}bla ${food} ";
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String expected = "barbla foofoo ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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properties.setProperty("food", "foofoo");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps8() {
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String expr = "foo";
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String expected = "foo";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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String result = StringHelper.replacePropertiesIn(properties, expr);
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assertEquals(expected, result);
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}
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@Test
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public void shouldReplaceProps9() {
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String expr = "%{foo}bla %{food} ";
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String expected = "barbla foofoo ";
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Properties properties = new Properties();
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properties.setProperty("foo", "bar");
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properties.setProperty("food", "foofoo");
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String result = StringHelper.replacePropertiesIn(properties, '%', expr);
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assertEquals(expected, result);
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}
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}
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