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/*
* IzPack - Copyright 2001-2013 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2012 Tim Anderson
*
* 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 com.izforge.izpack.panels.userinput.field;
import com.izforge.izpack.api.adaptator.IXMLElement;
import com.izforge.izpack.api.data.binding.OsModel;
import com.izforge.izpack.api.exception.IzPackException;
import java.util.ArrayList;
import java.util.List;
/**
* Field reader.
*
* @author Tim Anderson
*/
public class FieldReader extends ElementReader implements FieldConfig
{
/**
* The field element.
*/
private final IXMLElement field;
/**
* The field specification. May be {@code null}.
*/
private final IXMLElement spec;
/**
* Variable attribute name.
*/
public static final String VARIABLE = "variable";
/**
* Variable attribute name.
*/
public static final String SUMMARY_KEY = "summaryKey";
public static final String DISPLAY_HIDDEN = "displayHidden";
public static final String DISPLAY_HIDDEN_CONDITION = "displayHiddenCondition";
public static final String READONLY = "readonly";
public static final String READONLY_CONDITION = "readonlyCondition";
/**
* Text size attribute name.
*/
public static final String TEXT_SIZE = "size";
/**
* The field specification element name.
*/
public static final String SPEC = "spec";
/**
* The validator element name.
*/
public static final String VALIDATOR = "validator";
/**
* The tooltip attribute name.
*/
public static final String TOOLTIP = "tooltip";
/**
* The omitFromAuto attribute name.
*/
public static final String OMIT_FROM_AUTO = "omitFromAuto";
/**
* Constructs a {@code FieldReader}.
*
* @param field the field element to read
* @param config the configuration
*/
public FieldReader(IXMLElement field, Config config)
{
super(config);
this.field = field;
this.spec = getSpec(field, config);
}
/**
* Returns the 'field' element.
*
* @return the 'field' element
*/
public IXMLElement getField()
{
return field;
}
/**
* Returns the 'spec' element.
*
* @return the 'spec' element, or {@code null} if none is present
*/
public IXMLElement getSpec()
{
return spec;
}
/**
* Returns the value of 'omitFromAuto' from fields spec
*
* @return the 'omitFromAuto' attribute
*/
public boolean getOmitFromAuto() {
return getConfig().getBoolean(getSpec(), OMIT_FROM_AUTO, false);
}
/**
* Returns the variable that the field reads and updates.
*
* This implementation throws an exception if the variable is not present; subclasses override and return
* {@code null} if the variable is optional.
*
* @return the 'variable' attribute, or {@code null} if the variable is optional but not present
* @throws IzPackException if the 'variable' attribute is mandatory but not present
*/
@Override
public String getVariable()
{
return getConfig().getAttribute(getField(), VARIABLE);
}
/**
* Returns the summaryKey that the field is associated with.
*
*
* @return the 'summaryKey' attribute, or {@code null}
*/
@Override
public String getSummaryKey()
{
return getConfig().getAttribute(getField(), SUMMARY_KEY, true);
}
@Override
public Boolean isDisplayHidden()
{
return getConfig().getBooleanOrNull(getField(), DISPLAY_HIDDEN);
}
@Override
public String getDisplayHiddenCondition()
{
return getConfig().getAttribute(getField(), DISPLAY_HIDDEN_CONDITION, true);
}
@Override
public Boolean isReadonly()
{
return getConfig().getBooleanOrNull(getField(), READONLY);
}
@Override
public String getReadonlyCondition()
{
return getConfig().getAttribute(getField(), READONLY_CONDITION, true);
}
/**
* Returns the packs that this field applies to.
*
* @return the list of pack names
*/
@Override
public List getPacks()
{
return getPacks(field);
}
/**
* Returns the operating systems that this field applies to.
*
* @return the operating systems, or an empty list if the field applies to all operating systems
*/
@Override
public List getOsModels()
{
return getOsModels(field);
}
/**
* Returns the default value of the field without replacing variables.
*
* This is obtained from the 'default' attribute of the 'spec' element.
*
* @return the default value. May be {@code null}
*/
@Override
public String getDefaultValue()
{
return (spec != null) ? getConfig().getRawString(spec, "default", null) : null;
}
/**
* Returns the initial value of the field without replacing variables.
*
* This is obtained from the 'set' attribute of the 'spec' element.
*
* @return the default value. May be {@code null}
*/
@Override
public String getInitialValue()
{
return (spec != null) ? getConfig().getRawString(spec, "set", null) : null;
}
/**
* Returns the field size.
*
* @return the field size, or {@code -1} if no size is specified, or the specified size is invalid
*/
@Override
public int getSize()
{
int result = -1;
if (spec != null)
{
result = getConfig().getInt(spec, TEXT_SIZE, result);
}
return result;
}
/**
* Returns the validators for the field.
*
* @return the validators for the field
*/
@Override
public List getValidators(IXMLElement field)
{
List result = new ArrayList();
Config config = getConfig();
for (IXMLElement element : field.getChildrenNamed(VALIDATOR))
{
FieldValidatorReader reader = new FieldValidatorReader(element, config);
result.add(new FieldValidator(reader.getClassName(), reader.getParameters(), reader.getMessage(),
config.getFactory()));
}
return result;
}
@Override
public List getValidators()
{
return getValidators(this.field);
}
/**
* Returns the processor the field.
*
* @return the field processor, or {@code null} if none exists
*/
@Override
public FieldProcessor getProcessor()
{
IXMLElement element = (spec != null) ? spec.getFirstChildNamed("processor") : null;
return element != null ? new FieldProcessor(element, getConfig()) : null;
}
/**
* Returns the field description.
*
* @return the field description. May be @{code null}
*/
@Override
public String getDescription()
{
return getText(field.getFirstChildNamed("description"));
}
/**
* Returns the field's tooltip.
*
* @return the field tooltip. May be @{code null}
*/
@Override
public String getTooltip() {
return getConfig().getAttribute(field, TOOLTIP, true);
}
/**
* Returns the field label.
*
* @return the field label. May be {@code null}
*/
@Override
public String getLabel()
{
return getText(getSpec());
}
/**
* Returns the condition that determines if the field is displayed or not.
*
* @return the condition. May be {@code null}
*/
@Override
public String getCondition()
{
return getConfig().getString(getField(), "conditionid", null);
}
/**
* Returns the 'spec' element.
*
* @param field the parent field element
* @param config the configuration
* @return the 'spec' element, or {@code null} if the spec element is optional and not found
* @throws IzPackException if the 'spec' element is mandatory but not present
*/
protected IXMLElement getSpec(IXMLElement field, Config config)
{
return config.getElement(field, SPEC);
}
/**
* Extracts the text from an element. The text can be defined:
*
*
in the locale's messages, under the key defined by the {@code id} attribute; or
*
as value of the attribute {@code txt}.
*
*
* @param element the element from which to extract the text
* @return the text, or {@code null} if none can be found
*/
protected String getText(IXMLElement element)
{
return getConfig().getText(element);
}
}
