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/*
* 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 tinker.net.dongliu.apk.parser.utils.xml;
import java.io.IOException;
import java.io.Writer;
/**
* Translates codepoints to their XML numeric entity escaped value.
*/
class NumericEntityEscaper extends CodePointTranslator {
private final int below;
private final int above;
private final boolean between;
/**
* Constructs a NumericEntityEscaper for the specified range. This is
* the underlying method for the other constructors/builders. The below
* and above boundaries are inclusive when between is
* true and exclusive when it is false.
*
* @param below int value representing the lowest codepoint boundary
* @param above int value representing the highest codepoint boundary
* @param between whether to escape between the boundaries or outside them
*/
private NumericEntityEscaper(final int below, final int above, final boolean between) {
this.below = below;
this.above = above;
this.between = between;
}
/**
* Constructs a NumericEntityEscaper for all characters.
*/
public NumericEntityEscaper() {
this(0, Integer.MAX_VALUE, true);
}
/**
* Constructs a NumericEntityEscaper below the specified value (exclusive).
*
* @param codepoint below which to escape
* @return the newly created {@code NumericEntityEscaper} instance
*/
public static NumericEntityEscaper below(final int codepoint) {
return outsideOf(codepoint, Integer.MAX_VALUE);
}
/**
* Constructs a NumericEntityEscaper above the specified value (exclusive).
*
* @param codepoint above which to escape
* @return the newly created {@code NumericEntityEscaper} instance
*/
public static NumericEntityEscaper above(final int codepoint) {
return outsideOf(0, codepoint);
}
/**
* Constructs a NumericEntityEscaper between the specified values (inclusive).
*
* @param codepointLow above which to escape
* @param codepointHigh below which to escape
* @return the newly created {@code NumericEntityEscaper} instance
*/
public static NumericEntityEscaper between(final int codepointLow, final int codepointHigh) {
return new NumericEntityEscaper(codepointLow, codepointHigh, true);
}
/**
* Constructs a NumericEntityEscaper outside of the specified values (exclusive).
*
* @param codepointLow below which to escape
* @param codepointHigh above which to escape
* @return the newly created {@code NumericEntityEscaper} instance
*/
public static NumericEntityEscaper outsideOf(final int codepointLow, final int codepointHigh) {
return new NumericEntityEscaper(codepointLow, codepointHigh, false);
}
/**
* {@inheritDoc}
*/
@Override
public boolean translate(final int codepoint, final Writer out) throws IOException {
if(between) {
if (codepoint < below || codepoint > above) {
return false;
}
} else {
if (codepoint >= below && codepoint <= above) {
return false;
}
}
out.write("&#");
out.write(Integer.toString(codepoint, 10));
out.write(';');
return true;
}
}