package org.jboss.resteasy.core.request;

import java.math.BigDecimal;
import java.math.MathContext;

import javax.ws.rs.core.MediaType;


A individual variant quality bean for the RVSA (Remote Variant Selection Algorithm).
Author:Pascal S. de Kloe
See Also:
  • RFC 2296
/** * A individual variant quality bean for the RVSA (Remote Variant Selection Algorithm). * * @author Pascal S. de Kloe * @see "RFC 2296" */
public class VariantQuality { private QualityValue mediaTypeQualityValue = QualityValue.DEFAULT; private QualityValue characterSetQualityValue = QualityValue.DEFAULT; private QualityValue encodingQualityValue = QualityValue.DEFAULT; private QualityValue languageQualityValue = QualityValue.DEFAULT; private MediaType requestMediaType; public VariantQuality() { } public void setMediaTypeQualityValue(QualityValue value) { if (value == null) mediaTypeQualityValue = QualityValue.DEFAULT; else mediaTypeQualityValue = value; } public void setCharacterSetQualityValue(QualityValue value) { if (value == null) characterSetQualityValue = QualityValue.DEFAULT; else characterSetQualityValue = value; } public void setEncodingQualityValue(QualityValue value) { if (value == null) encodingQualityValue = QualityValue.DEFAULT; else encodingQualityValue = value; } public void setLanguageQualityValue(QualityValue value) { if (value == null) languageQualityValue = QualityValue.DEFAULT; else languageQualityValue = value; } public MediaType getRequestMediaType() { return requestMediaType; } public void setRequestMediaType(MediaType requestMediaType) { this.requestMediaType = requestMediaType; }
See Also:
  • 3.3 Computing overall quality values
Returns:the quality value between zero and one with five decimal places after the point.
/** * @return the quality value between zero and one with five decimal places after the point. * @see "3.3 Computing overall quality values" */
public BigDecimal getOverallQuality() { BigDecimal qt = BigDecimal.valueOf(mediaTypeQualityValue.intValue(), 3); BigDecimal qc = BigDecimal.valueOf(characterSetQualityValue.intValue(), 3); BigDecimal qe = BigDecimal.valueOf(encodingQualityValue.intValue(), 3); BigDecimal ql = BigDecimal.valueOf(languageQualityValue.intValue(), 3); assert qt.compareTo(BigDecimal.ZERO) >= 0 && qt.compareTo(BigDecimal.ONE) <= 0; assert qc.compareTo(BigDecimal.ZERO) >= 0 && qc.compareTo(BigDecimal.ONE) <= 0; assert qe.compareTo(BigDecimal.ZERO) >= 0 && qe.compareTo(BigDecimal.ONE) <= 0; assert ql.compareTo(BigDecimal.ZERO) >= 0 && ql.compareTo(BigDecimal.ONE) <= 0; BigDecimal result = qt; result = result.multiply(qc, MathContext.DECIMAL32); result = result.multiply(qe, MathContext.DECIMAL32); result = result.multiply(ql, MathContext.DECIMAL32); assert result.compareTo(BigDecimal.ZERO) >= 0 && result.compareTo(BigDecimal.ONE) <= 0; long round5 = result.scaleByPowerOfTen(5).longValue(); result = BigDecimal.valueOf(round5, 5); assert result.compareTo(BigDecimal.ZERO) >= 0 && result.compareTo(BigDecimal.ONE) <= 0; return result; } }