1 files changed, 187 insertions, 0 deletions
diff --git a/src/main/java/at/gv/util/ToStringUtil.java b/src/main/java/at/gv/util/ToStringUtil.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/at/gv/util/ToStringUtil.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2011 Federal Chancellery Austria and
+ * Graz University of Technology
+ * 
+ * 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 at.gv.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.Arrays;
+import java.util.Enumeration;
+import java.util.Iterator;
+
+import org.apache.commons.lang.builder.ToStringBuilder;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+/**
+ * @author <a href="mailto:thomas.knall@iaik.tugraz.at">Thomas Knall</a>
+ */
+public final class ToStringUtil {
+
+	public static final String DEFAULT_NULL = "null";
+	public static final String DEFAULT_AROUND = "";
+	public static final String DEFAULT_DELIMITER = ", ";
+
+	private ToStringUtil() {
+	}
+
+	// implementing methods
+
+	public static <E> String toString(Enum enumImpl) {
+		return enumImpl == null ? DEFAULT_NULL : enumImpl.name();
+	}
+
+	public static String toString(Throwable t) {
+		ByteArrayOutputStream baout = new ByteArrayOutputStream();
+		t.printStackTrace(new PrintStream(baout, true));
+		String result = new String(baout.toByteArray());
+		return result;
+	}
+
+	public static String toString(byte b) {
+		StringBuffer sb = new StringBuffer(2);
+		int h = (b & 0xf0) >> 4;
+		int l = (b & 0x0f);
+		sb.append(new Character((char) ((h > 9) ? 'a' + h - 10 : '0' + h)));
+		sb.append(new Character((char) ((l > 9) ? 'a' + l - 10 : '0' + l)));
+		return sb.toString();
+	}
+
+	public static String toString(byte[] data, String delimiter,
+	    boolean removeLeadingZeros) {
+		StringBuffer result = new StringBuffer();
+		int i = 0;
+		if (removeLeadingZeros) {
+			for (; i < data.length && data[i] == 0; i++)
+				;
+		}
+		for (; i < data.length; i++) {
+			result.append(toString(data[i]));
+			if (delimiter != null && (i + 1) < data.length) {
+				result.append(delimiter);
+			}
+		}
+		if (result.length() == 0 && data.length > 0) {
+			result.append("00");
+		}
+		return result.toString();
+	}
+
+	public static String toString(byte[] data, String delimiter) {
+		return toString(data, delimiter, false);
+	}
+
+	public static String toString(byte[] data) {
+		return toString(data, null);
+	}
+
+	public static String toString(Object a) {
+		if (a == null) {
+			return DEFAULT_NULL;
+		}
+
+		if (a instanceof Enum) {
+			return toString((Enum) a);
+
+		} else {
+			return a.toString();
+		}
+	}
+
+	// some convenient functions
+
+	public static <T> String[] toStringArray(T[] a) {
+		if (a == null) {
+			return null;
+		}
+		String[] result = new String[a.length];
+		for (int i = 0; i < a.length; i++) {
+			result[i] = toString(a[i]);
+		}
+		return result;
+	}
+
+	public static <T> String toString(T[] a) {
+		return toString(a, DEFAULT_DELIMITER);
+	}
+
+	public static <T> String toString(T[] a, String delimiter) {
+		return toString(a, delimiter, DEFAULT_AROUND);
+	}
+
+	public static <T> String toString(T[] a, String delimiter, String around) {
+		return toString(Arrays.asList(a), delimiter, around);
+	}
+
+	public static <T> String toString(Iterable<T> iterable) {
+		return toString(iterable, DEFAULT_DELIMITER);
+	}
+
+	public static <T> String toString(Iterable<T> iterable, String delimiter) {
+		return toString(iterable, delimiter, DEFAULT_AROUND);
+	}
+
+	public static <T> String toString(Iterable<T> iterable, String delimiter,
+	    String around) {
+		if (iterable == null) {
+			return DEFAULT_NULL;
+		}
+		StringBuffer buffer = new StringBuffer();
+		Iterator<T> it = iterable.iterator();
+		while (it.hasNext()) {
+			T next = it.next();
+			buffer.append(around).append(toString(next)).append(around);
+			if (it.hasNext()) {
+				buffer.append(delimiter);
+			}
+		}
+		return buffer.toString();
+	}
+
+	public static <T> String toString(Enumeration<T> enumeration) {
+		return toString(enumeration, DEFAULT_DELIMITER);
+	}
+
+	public static <T> String toString(Enumeration<T> enumeration, String delimiter) {
+		return toString(enumeration, delimiter, DEFAULT_AROUND);
+	}
+
+	public static <T> String toString(Enumeration<T> enumeration,
+	    String delimiter, String around) {
+		if (enumeration == null) {
+			return DEFAULT_NULL;
+		}
+		StringBuffer buffer = new StringBuffer();
+		while (enumeration.hasMoreElements()) {
+			T next = enumeration.nextElement();
+			buffer.append(around).append(toString(next)).append(around);
+			if (enumeration.hasMoreElements()) {
+				buffer.append(delimiter);
+			}
+		}
+		return buffer.toString();
+	}
+
+	public static String toString(NamedNodeMap nnm) {
+		ToStringBuilder tsb = new ToStringBuilder(nnm);
+		for (int i = 0; i < nnm.getLength(); i++) {
+			Node node = nnm.item(i);
+			tsb.append(node.getNodeName(), node.getNodeValue());
+		}
+		return tsb.toString();
+	}
+
+}