diff options
Diffstat (limited to 'id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java')
-rw-r--r-- | id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java new file mode 100644 index 000000000..3a2ee07de --- /dev/null +++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/auth/builder/Builder.java @@ -0,0 +1,59 @@ +package at.gv.egovernment.moa.id.auth.builder; + +import at.gv.egovernment.moa.id.BuildException; +import at.gv.egovernment.moa.util.StringUtils; + +/** + * Base class for HTML/XML builders providing commonly useful functions. + * + * @author Paul Ivancsics + * @version $Id$ + */ +public class Builder { + + /** + * Replaces a given number of occurences of a special tag in an XML or HTML template by a value. + * @param template html template + * @param tag special tag + * @param value value replacing the tag + * @param expected specifies if the tag is expected to present; if <code>true</code> and the tag + * is not present, an exception is thrown; if <code>false</code> and the tag is + * not present, the original string is returned + * @param maxreplacements Set -1 to replace each occurence of tag, or limit replacements by a given positive number + * @return XML or HTML code, the tag replaced + * @throws BuildException when template does not contain the tag + */ + protected String replaceTag( + String template, + String tag, + String value, + boolean expected, + int maxreplacements) + throws BuildException + { + String result = template; + int index = result.indexOf(tag); + if (index < 0) { + if (expected) { + // Substring not found but should + throw new BuildException( + "builder.01", + new Object[] {"<" + tag.substring(1, tag.length() - 1) + ">"}); + } + } else { + // replace each occurence + if (maxreplacements == -1) { + return StringUtils.replaceAll(template, tag, value); + } else { + int found = 1; + while (index > -1 && (found <= maxreplacements)) { + result = result.substring(0, index) + value + result.substring(index + tag.length()); + index = result.indexOf(tag); + if (index > -1) found += 1; + } + } + } + return result; + } + +} |