Author: sgoeschl
Date: Fri Dec 7 08:39:01 2007
New Revision: 602146
URL: http://svn.apache.org/viewvc?rev=602146&view=rev
Log:
Adding command line expansion based on user-supplied map
Added:
commons/sandbox/exec/trunk/src/main/java/org/apache/commons/exec/util/StringUtils.java
Added:
commons/sandbox/exec/trunk/src/main/java/org/apache/commons/exec/util/StringUtils.java
URL:
http://svn.apache.org/viewvc/commons/sandbox/exec/trunk/src/main/java/org/apache/commons/exec/util/StringUtils.java?rev=602146&view=auto
==============================================================================
---
commons/sandbox/exec/trunk/src/main/java/org/apache/commons/exec/util/StringUtils.java
(added)
+++
commons/sandbox/exec/trunk/src/main/java/org/apache/commons/exec/util/StringUtils.java
Fri Dec 7 08:39:01 2007
@@ -0,0 +1,130 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.commons.exec.util;
+
+
+import java.util.Map;
+
+/**
+ * Supplement of commons-lang, the stringSubstitution() was in a simpler
+ * implementation available in an older commons-lang implementation
+ *
+ * @author <a href="mailto:[EMAIL PROTECTED]">Siegfried Goeschl</a>
+ */
+public class StringUtils
+{
+ /**
+ * Perform a series of substitutions. The substitions
+ * are performed by replacing ${variable} in the target
+ * string with the value of provided by the key "variable"
+ * in the provided hashtable.
+ *
+ * @param argStr the argument string to be processed
+ * @param vars name/value pairs used for substitution
+ * @param isLenient ignore a key not found in vars?
+ * @return String target string with replacements.
+ */
+ public static StringBuffer stringSubstitution(String argStr, Map vars,
boolean isLenient)
+ {
+ StringBuffer argBuf = new StringBuffer();
+
+ if(argStr == null || argStr.length() == 0) {
+ return argBuf;
+ }
+
+ if(vars == null || vars.size() == 0) {
+ return argBuf.append(argStr);
+ }
+
+ int argStrLength = argStr.length();
+
+ for (int cIdx = 0 ; cIdx < argStrLength;)
+ {
+ char ch = argStr.charAt(cIdx);
+ char del = ' ';
+
+ switch (ch)
+ {
+ case '$':
+ StringBuffer nameBuf = new StringBuffer();
+ del = argStr.charAt(cIdx+1);
+ if( del == '{')
+ {
+ cIdx++;
+
+ for (++cIdx ; cIdx < argStr.length(); ++cIdx)
+ {
+ ch = argStr.charAt(cIdx);
+ if (ch == '_' || ch == '.' || ch == '-' || ch == '+'
|| Character.isLetterOrDigit(ch))
+ nameBuf.append(ch);
+ else
+ break;
+ }
+
+ if (nameBuf.length() > 0)
+ {
+ Object temp = vars.get(nameBuf.toString());
+ String value = ( temp != null ? temp.toString() :
null);
+
+ if (value != null)
+ {
+ argBuf.append(value);
+ }
+ else
+ {
+ if (isLenient)
+ {
+ // just append the unresolved variable
declaration
+ argBuf.append("${" + nameBuf.toString() +
"}");
+ }
+ else
+ {
+ // complain that no variable was found
+ throw new RuntimeException("No value found
for : " + nameBuf );
+ }
+ }
+
+ del = argStr.charAt(cIdx);
+
+ if( del != '}')
+ {
+ throw new RuntimeException("Delimiter not found
for : " + nameBuf );
+ }
+ }
+
+ cIdx++;
+ }
+ else
+ {
+ argBuf.append(ch);
+ ++cIdx;
+ }
+
+ break;
+
+ default:
+ argBuf.append(ch);
+ ++cIdx;
+ break;
+ }
+ }
+
+ return argBuf;
+ }
+}
