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/*******************************************************************************
* Copyright (c) 2009, 2010 Alena Laskavaia
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Alena Laskavaia - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.codan.core.param;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.StreamTokenizer;
/**
* Default implementation of problem preference. It keeps preference metadata
* together with preference value. Some implementations may separate them.
*
*/
public abstract class AbstractProblemPreference implements IProblemPreference {
/**
* default key for a preference
*/
public static final String PARAM = "params"; //$NON-NLS-1$
private String key = PARAM;
private String label = ""; //$NON-NLS-1$
private String toolTip = null;
private String uiInfo;
private IProblemPreference parent;
public String getLabel() {
return label;
}
public String getToolTip() {
return toolTip;
}
public String getKey() {
return key;
}
public String getUiInfo() {
return uiInfo;
}
/**
* Set preference key for itself
*
* @param key
*/
public void setKey(String key) {
if (key == null)
throw new NullPointerException("key"); //$NON-NLS-1$
if (isValidIdentifier(key))
this.key = key;
else
throw new IllegalArgumentException(
"Key must have java identifier syntax or number, i.e no dots and other funky stuff: " + key); //$NON-NLS-1$
}
protected boolean isValidIdentifier(String id) {
if (id == null)
return false;
int n = id.length();
if (n == 0)
return false;
if (id.equals("#")) //$NON-NLS-1$
return true;
for (int i = 0; i < n; i++)
if (!Character.isJavaIdentifierPart(id.charAt(i)))
return false;
return true;
}
/**
* Sets a label for UI control
*
* @param label
*/
public void setLabel(String label) {
if (label == null)
throw new NullPointerException("Label cannot be null"); //$NON-NLS-1$
this.label = label;
}
/**
* Sets tooltip for ui control. Not supported now.
*
* @param tooltip
*/
public void setToolTip(String tooltip) {
this.toolTip = tooltip;
}
/**
* Sets uiinfo for ui control. Not supported now.
*
* @param uiinfo
*/
public void setUiInfo(String uiinfo) {
this.uiInfo = uiinfo;
}
public Object getValue() {
throw new UnsupportedOperationException();
}
public void setValue(Object value) {
throw new UnsupportedOperationException();
}
@Override
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
return null;
}
}
/**
* @param str
* @return
*/
protected StreamTokenizer getImportTokenizer(String str) {
ByteArrayInputStream st = new ByteArrayInputStream(str.getBytes());
StreamTokenizer tokenizer = new StreamTokenizer(new InputStreamReader(
st));
tokenizer.resetSyntax();
tokenizer.quoteChar('"');
tokenizer.wordChars('_', '_');
tokenizer.wordChars('-', '-');
tokenizer.wordChars('.', '.');
tokenizer.wordChars('0', '9');
tokenizer.wordChars('a', 'z');
tokenizer.wordChars('A', 'Z');
tokenizer.wordChars(128 + 32, 255);
tokenizer.whitespaceChars(0, ' ');
tokenizer.commentChar('/');
return tokenizer;
}
public IProblemPreference getParent() {
return parent;
}
/**
* @param parent
* the parent to set
*/
public void setParent(IProblemPreference parent) {
this.parent = parent;
}
public String getQualifiedKey() {
if (parent == null)
return getKey();
return parent.getQualifiedKey() + "." + getKey(); //$NON-NLS-1$
}
/**
* @param tokenizer
* @throws IOException
*/
public abstract void importValue(StreamTokenizer tokenizer)
throws IOException;
public void importValue(String str) {
StreamTokenizer tokenizer = getImportTokenizer(str);
try {
importValue(tokenizer);
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException(str, e);
} catch (IOException e) {
throw new IllegalArgumentException(e);
}
}
protected String escape(String x) {
x = x.replaceAll("[\"\\\\]", "\\\\$0"); //$NON-NLS-1$//$NON-NLS-2$
return "\"" + x + "\""; //$NON-NLS-1$//$NON-NLS-2$
}
/**
* @param str
* @return
*/
protected String unescape(String str) {
StreamTokenizer tokenizer = getImportTokenizer(str);
try {
tokenizer.nextToken();
} catch (IOException e) {
return null;
}
String sval = tokenizer.sval;
return sval;
}
}
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