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/*
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* JBind
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*
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* Copyright (c) by Stefan Wachter. All rights reserved.
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*
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* Usage, modification, and redistribution is subject to license terms that are
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* available at 'http://www.jbind.org'. The JBind license is like the
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* 'Apache Software License V 1.1'.
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*/
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package org.jbind.xml.base;
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import org.jbind.util.other.StrBuffer;
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public class WhiteSpaceProcessing {
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public static WhiteSpaceProcessing NONE = new WhiteSpaceProcessing(0, "none");
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/**
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* The first level.
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*/
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public static WhiteSpaceProcessing PRESERVE = new WhiteSpaceProcessing(1, "preserve");
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/**
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* The second level.
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*/
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public static WhiteSpaceProcessing REPLACE = new WhiteSpaceProcessing(2, "replace");
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/**
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* The third level.
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*/
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public static WhiteSpaceProcessing COLLAPSE = new WhiteSpaceProcessing(3, "collapse");
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private int myLevel;
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private String myName = null;
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private WhiteSpaceProcessing(int aLevel, String aName) {
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myLevel = aLevel;
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myName = aName;
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}
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/**
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* Checks if this white space processing is after the specified white space processing.
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*
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* @param aWSP <i>(required)</i>.
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*/
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public boolean isAfter(WhiteSpaceProcessing aWSP) {
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return myLevel > aWSP.myLevel;
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}
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/**
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* Checks if this white space processing is before the specified white space processing.
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*
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* @param aWSP <i>(required)</i>.
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*/
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public boolean isBefore(WhiteSpaceProcessing aWSP) {
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return myLevel < aWSP.myLevel;
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}
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public String process(String aString) {
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String res = null;
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if (myLevel <= 1) {
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res = aString;
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} else {
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int length = aString.length();
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StrBuffer sb = new StrBuffer(length);
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// Suppress leading space if necessary
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boolean spaceInserted = true;
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for (int i = 0; i < length; i++) {
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char c = aString.charAt(i);
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if ((c == '\t') || (c == '\n') || (c == '\r')) {
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c = ' ';
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}
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if ((c != ' ') || (myLevel == 2) || !spaceInserted) {
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sb.append(c);
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spaceInserted = c == ' ';
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}
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}
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// Remove trailing space if necessary
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if (myLevel == 3) {
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int l = sb.length();
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if ((l > 0) && (sb.charAt(l - 1) == ' ')) {
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sb.deleteCharAt(l - 1);
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}
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}
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res = sb.toString();
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}
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return res;
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}
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/**
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* Checks if a string satisfies the white space processing.
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*
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* @param aString <i>(required)</i>.
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* @return Returns <code>true</code> iff the string satisfies the white space
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* processing.
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*/
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public boolean check(String aString) {
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boolean res = true;
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if (myLevel == 1) {}
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else {
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boolean hadSpace = true;
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for (int i = aString.length(); res && (--i >= 0); ) {
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char c = aString.charAt(i);
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res = ((c != '\t') && (c != '\n') && (c != '\r'));
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if (res) {
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res = (myLevel != 3) || (c != ' ') || !hadSpace;
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}
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hadSpace = c == ' ';
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}
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if (res) {
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res = (myLevel != 3) || (aString.length() == 0) || (aString.charAt(0) != ' ');
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}
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}
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return res;
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}
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public String toString() {
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return myName;
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}
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}
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